import {
  useCallback,
  useEffect,
  forwardRef,
  useMemo,
  useRef,
  useState,
  type Dispatch,
  type FormEvent,
  type ReactNode,
  type SetStateAction,
} from "react";
import {
  Activity,
  ArrowUpCircle,
  ArrowUpDown,
  Bot,
  Brain,
  Check,
  CircleAlert,
  ChevronDown,
  ChevronLeft,
  ChevronRight,
  Cloud,
  Clipboard,
  Cpu,
  Database,
  Eye,
  EyeOff,
  ExternalLink,
  Gem,
  Globe2,
  GripVertical,
  Grid3X3,
  HardDrive,
  Hexagon,
  ImageIcon,
  Layers,
  ListOrdered,
  Loader2,
  LogOut,
  MessageCircle,
  Mic,
  Moon,
  PauseCircle,
  PlayCircle,
  Plus,
  Orbit,
  Palette,
  Pencil,
  RotateCcw,
  Search,
  Server,
  ShieldCheck,
  SlidersHorizontal,
  Sparkles,
  Trash2,
  Triangle,
  Waves,
  X,
  Zap,
  type LucideIcon,
} from "lucide-react";
import { useTranslation } from "react-i18next";

import { channelUiPresentation } from "@/channel-plugins/registry";
import { LanguageSwitcher } from "@/components/LanguageSwitcher";
import {
  SIDEBAR_SELECTION_ITEM_CLASS,
  SidebarSelectionHighlight,
} from "@/components/SidebarSelectionHighlight";
import { SkillsCatalogSettings } from "@/components/settings/SkillsCatalogSettings";
import { TokenUsageHeatmap } from "@/components/settings/TokenUsageHeatmap";
import { ToggleButton } from "@/components/settings/ToggleButton";
import {
  channelIsRunning,
  channelMatchesFilter,
  channelSearchText,
  localizedChannelDisplayName,
  type ChannelFilter,
} from "@/components/settings/channels/ChannelIdentity";
import {
  ChannelCatalogRow,
  ChannelSetupPanel,
} from "@/components/settings/channels/ChannelSetupPanel";
import { Button } from "@/components/ui/button";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { Input } from "@/components/ui/input";
import { Textarea } from "@/components/ui/textarea";
import { isLoopbackHost } from "@/lib/network";
import {
  checkVersion,
  completeProviderOAuth,
  createModelConfiguration,
  createProviderSettings,
  deleteModelConfiguration,
  disableNanobotFeature,
  enableNanobotFeature,
  fetchApiService,
  fetchAutomations,
  fetchSettings,
  fetchSettingsUsage,
  fetchCliApps,
  fetchMcpPresets,
  fetchNanobotFeatures,
  fetchProviderModels,
  importMcpConfig,
  loginProviderOAuth,
  logoutProviderOAuth,
  migrateModelConfigurations,
  runAutomationAction,
  runCliAppAction,
  runMcpPresetAction,
  saveCustomMcpServer,
  startApiService,
  stopApiService,
  updateAutomation,
  updateImageGenerationSettings,
  updateMcpServerTools,
  updateModelCallOrder,
  updateModelConfiguration,
  updateNetworkSafetySettings,
  updateProviderSettings,
  updateSettings,
  updateTranscriptionSettings,
  updateWebSearchSettings,
} from "@/lib/api";
import { notifyCliAppsChanged } from "@/lib/cli-app-events";
import { copyTextToClipboard } from "@/lib/clipboard";
import {
  readLocalPreferences,
  writeLocalPreferences,
  type FileEditDisplayMode,
  type LocalActivityMode,
  type LocalDensity,
  type LocalPreferences,
} from "@/lib/local-preferences";
import { getRuntimeHost, isNativeRuntime } from "@/lib/runtime";
import { notifyMcpPresetsChanged } from "@/lib/mcp-preset-events";
import { fmtDateTime, relativeTime } from "@/lib/format";
import { useLogoFallback } from "@/hooks/useLogoFallback";
import { useMediaQuery } from "@/hooks/useMediaQuery";
import { usePageVisibility } from "@/hooks/usePageVisibility";
import {
  isGenericRepositoryLogoUrl,
  logoFallbackUrls,
  providerBrand,
  providerDisplayLabel,
} from "@/lib/provider-brand";
import { cn } from "@/lib/utils";
import { shortWorkspacePath } from "@/lib/workspace";
import { useClient } from "@/providers/ClientProvider";
import type {
  ApiServicePayload,
  AutomationsPayload,
  AutomationUpdatePayload,
  CliAppInfo,
  CliAppsPayload,
  ImageGenerationSettingsUpdate,
  McpPresetInfo,
  McpPresetsPayload,
  NanobotFeatureInfo,
  NanobotFeaturesPayload,
  NetworkSafetySettingsUpdate,
  ProviderModelsPayload,
  ProviderOAuthAuthorizationRequired,
  ProviderOAuthCompletionResult,
  ProviderOAuthLoginResult,
  ProviderOAuthPending,
  ProviderSettingsUpdate,
  SessionAutomationJob,
  SettingsPayload,
  SkillSummary,
  TranscriptionSettingsUpdate,
  WebSearchSettingsUpdate,
  WebuiDefaultAccessMode,
} from "@/lib/types";

export type SettingsSectionKey =
  | "overview"
  | "appearance"
  | "models"
  | "image"
  | "voice"
  | "browser"
  | "channels"
  | "apps"
  | "automations"
  | "skills"
  | "runtime"
  | "advanced";

function isProviderOAuthAuthorizationRequired(
  payload: ProviderOAuthLoginResult,
): payload is ProviderOAuthAuthorizationRequired {
  return (payload as ProviderOAuthAuthorizationRequired).status === "authorization_required";
}

function isProviderOAuthPending(
  payload: ProviderOAuthCompletionResult,
): payload is ProviderOAuthPending {
  return (payload as ProviderOAuthPending).status === "pending";
}

type AppsKindFilter = "ready" | "cli" | "mcp";
type AutomationFilter = "all" | "active" | "paused" | "failed" | "system";
type AutomationSort = "next" | "last" | "updated" | "name";
type AutomationAction = "enable" | "disable" | "delete" | "run";
type AppsCatalogItem =
  | { id: string; kind: "cli"; app: CliAppInfo }
  | { id: string; kind: "mcp"; preset: McpPresetInfo };

interface AgentSettingsDraft {
  model: string;
  provider: string;
  modelPreset: string;
  presetLabel: string;
  maxTokens: number;
  contextWindowTokens: number;
  temperature: number;
  reasoningEffort: string;
  timezone: string;
  toolHintMaxLength: number;
}

type PendingRestartSection = "runtime" | "browser" | "image";
type PendingRestartSections = Record<PendingRestartSection, boolean>;
type RestartAwarePayload = {
  requires_restart?: boolean;
  surface?: SettingsPayload["surface"];
  runtime_surface?: SettingsPayload["runtime_surface"];
  runtime_capabilities?: SettingsPayload["runtime_capabilities"];
};
type ProviderApiType = "auto" | "chat_completions" | "responses";
type ProviderAdvancedField = NonNullable<
  SettingsPayload["providers"][number]["advanced_fields"]
>[number];
type ProviderForm = {
  displayName: string;
  apiKey: string;
  apiBase: string;
  apiType: ProviderApiType;
  proxy: string;
  extraHeaders: string;
  extraBody: string;
  extraQuery: string;
  thinkingStyle: string;
  region: string;
  profile: string;
};
type CustomProviderDraft = ProviderForm & { name: string };
type CustomMcpTransport = "stdio" | "streamableHttp" | "sse";

const CONTEXT_WINDOW_TOKEN_OPTIONS = [65_536, 200_000, 262_144, 500_000, 1_048_576] as const;
const OAUTH_PROXY_PROVIDERS = new Set(["openai_codex", "xai_grok"]);
const CUSTOM_PROVIDER_CREATION_KEY = "__custom_provider__";
const CUSTOM_PROVIDER_ADVANCED_FIELDS: ProviderAdvancedField[] = [
  "extra_headers",
  "extra_body",
  "extra_query",
  "proxy",
  "thinking_style",
];
const DEFERRED_MODEL_LIST_PROVIDERS = new Set([
  "aihubmix",
  "atomic_chat",
  "byteplus",
  "byteplus_coding_plan",
  "huggingface",
  "lm_studio",
  "modelscope",
  "novita",
  "ollama",
  "openrouter",
  "ovms",
  "siliconflow",
  "vllm",
  "volcengine",
  "volcengine_coding_plan",
]);

function providerJsonValue(value: Record<string, unknown> | null | undefined): string {
  return value && Object.keys(value).length > 0 ? JSON.stringify(value, null, 2) : "";
}

function providerFormFromRow(
  provider: SettingsPayload["providers"][number],
): ProviderForm {
  return {
    displayName: provider.is_custom ? provider.label : "",
    apiKey: "",
    apiBase: provider.api_base ?? provider.default_api_base ?? "",
    apiType: provider.api_type ?? "auto",
    proxy: provider.proxy ?? "",
    extraHeaders: providerJsonValue(provider.extra_headers),
    extraBody: providerJsonValue(provider.extra_body),
    extraQuery: providerJsonValue(provider.extra_query),
    thinkingStyle: provider.thinking_style ?? "",
    region: provider.region ?? "",
    profile: provider.profile ?? "",
  };
}

function emptyCustomProviderDraft(): CustomProviderDraft {
  return {
    name: "",
    displayName: "",
    apiKey: "",
    apiBase: "",
    apiType: "auto",
    proxy: "",
    extraHeaders: "",
    extraBody: "",
    extraQuery: "",
    thinkingStyle: "",
    region: "",
    profile: "",
  };
}
const DEFERRED_MODEL_LIST_QUERY_MIN_LENGTH = 2;
const CLI_APPS_REFRESH_RETRY_MS = 2_000;
const CLI_APPS_REFRESH_MAX_RETRIES = 30;
const SETTINGS_SEARCH_INPUT_CLASS = cn(
  "border-border/45 bg-settings-surface transition-colors hover:border-border/70",
  "focus-visible:border-border/70 focus-visible:bg-background",
  "focus-visible:ring-0 focus-visible:ring-offset-0",
);

const FALLBACK_TIMEZONES = [
  "UTC",
  "Asia/Shanghai",
  "Asia/Hong_Kong",
  "Asia/Tokyo",
  "Asia/Seoul",
  "Asia/Singapore",
  "Asia/Taipei",
  "Asia/Dubai",
  "Asia/Kolkata",
  "Europe/London",
  "Europe/Paris",
  "Europe/Berlin",
  "Europe/Amsterdam",
  "America/New_York",
  "America/Chicago",
  "America/Denver",
  "America/Los_Angeles",
  "America/Toronto",
  "America/Sao_Paulo",
  "Australia/Sydney",
  "Pacific/Auckland",
];

interface CustomMcpForm {
  name: string;
  transport: CustomMcpTransport;
  command: string;
  args: string;
  url: string;
  env: string;
  headers: string;
  toolTimeout: string;
}

const OPENAI_API_TYPE_OPTIONS: Array<{ value: ProviderApiType; label: string }> = [
  { value: "auto", label: "Auto" },
  { value: "chat_completions", label: "Chat Completions" },
  { value: "responses", label: "Responses" },
];

const LOCAL_UNCONFIGURED_PROVIDER_ORDER = new Map(
  ["vllm", "ollama", "lm_studio", "atomic_chat", "ovms"].map((name, index) => [
    name,
    index,
  ]),
);

const IMAGE_ASPECT_RATIO_OPTIONS = ["1:1", "3:4", "9:16", "4:3", "16:9", "3:2", "2:3", "21:9"];
const IMAGE_SIZE_OPTIONS = ["1K", "2K", "4K", "1024x1024", "1536x1024", "1024x1536"];
const EMPTY_PENDING_RESTART_SECTIONS: PendingRestartSections = {
  runtime: false,
  browser: false,
  image: false,
};

const DEFAULT_CUSTOM_MCP_FORM: CustomMcpForm = {
  name: "",
  transport: "stdio",
  command: "",
  args: "",
  url: "",
  env: "",
  headers: "",
  toolTimeout: "30",
};

interface SettingsViewProps {
  theme: "light" | "dark";
  initialSection?: SettingsSectionKey;
  initialSettings?: SettingsPayload | null;
  showSidebar?: boolean;
  onToggleTheme: () => void;
  onBackToChat: () => void;
  onModelNameChange: (modelName: string | null) => void;
  onSettingsChange?: (payload: SettingsPayload) => void;
  skills?: SkillSummary[];
  onWorkspaceSettingsChange?: () => void | Promise<void>;
  onSectionChange?: (section: SettingsSectionKey) => void;
  onLogout?: () => void;
  onRestart?: () => void;
  onNativeEngineRestart?: () => Promise<string>;
  isRestarting?: boolean;
  hostChromeInset?: boolean;
}

function modelPresetValue(payload: SettingsPayload): string {
  return (
    payload.model_call_order?.[0] ??
    payload.model_presets.find((preset) => !preset.is_default)?.name ??
    ""
  );
}

function normalizeContextWindowTokens(value: number | null | undefined): number {
  return typeof value === "number" && Number.isFinite(value) && value > 0 ? value : 200_000;
}

function settingsProviderRow(
  payload: SettingsPayload,
  provider: string | null | undefined,
): SettingsPayload["providers"][number] | null {
  if (!provider) return null;
  return payload.providers.find((row) => row.name === provider) ?? null;
}

function settingsProviderConfigured(
  payload: SettingsPayload,
  provider: string | null | undefined,
  resolvedProvider?: string | null,
): boolean {
  const row = settingsProviderRow(payload, provider);
  if (row) return row.configured;
  if (provider === "auto") {
    const resolvedRow = settingsProviderRow(
      payload,
      resolvedProvider ?? payload.agent.resolved_provider ?? payload.agent.provider,
    );
    if (resolvedRow) return resolvedRow.configured;
  }
  return payload.agent.has_api_key;
}

const DEFAULT_AGENT_SETTINGS_DRAFT: AgentSettingsDraft = {
  model: "",
  provider: "",
  modelPreset: "",
  presetLabel: "",
  maxTokens: 8192,
  contextWindowTokens: 200_000,
  temperature: 0.1,
  reasoningEffort: "",
  timezone: "UTC",
  toolHintMaxLength: 40,
};

const DEFAULT_WEB_SEARCH_FORM: WebSearchSettingsUpdate = {
  provider: "duckduckgo",
  apiKey: "",
  baseUrl: "",
  maxResults: 5,
  timeout: 30,
  useJinaReader: true,
};

const DEFAULT_IMAGE_GENERATION_FORM: ImageGenerationSettingsUpdate = {
  enabled: false,
  provider: "openrouter",
  model: "openai/gpt-5.4-image-2",
  defaultAspectRatio: "1:1",
  defaultImageSize: "1K",
  maxImagesPerTurn: 4,
};

const DEFAULT_TRANSCRIPTION_FORM: TranscriptionSettingsUpdate = {
  enabled: true,
  provider: "groq",
  model: "",
  language: "",
  maxDurationSec: 120,
  maxUploadMb: 25,
};

const DEFAULT_TRANSCRIPTION_SETTINGS: NonNullable<SettingsPayload["transcription"]> = {
  enabled: true,
  provider: "groq",
  provider_configured: false,
  model: "whisper-large-v3",
  language: null,
  max_duration_sec: 120,
  max_upload_mb: 25,
  providers: [],
};

const DEFAULT_NETWORK_SAFETY_FORM: NetworkSafetySettingsUpdate = {
  webuiAllowLocalServiceAccess: true,
  webuiDefaultAccessMode: "default",
};

function agentDraftFromPayload(
  payload: SettingsPayload,
  preferredPresetName?: string,
): AgentSettingsDraft {
  const activePresetName = preferredPresetName ?? modelPresetValue(payload);
  const activePreset =
    payload.model_presets.find(
      (preset) => !preset.is_default && preset.name === activePresetName,
    ) ?? null;
  return {
    model: activePreset?.model ?? payload.agent.model,
    provider: activePreset?.provider ?? payload.agent.provider ?? payload.agent.resolved_provider ?? "",
    modelPreset: activePresetName,
    presetLabel: activePreset?.label ?? activePresetName,
    maxTokens: activePreset?.max_tokens ?? payload.agent.max_tokens,
    contextWindowTokens: normalizeContextWindowTokens(
      activePreset?.context_window_tokens ?? payload.agent.context_window_tokens,
    ),
    temperature: activePreset?.temperature ?? payload.agent.temperature,
    reasoningEffort: activePreset?.reasoning_effort ?? "",
    timezone: payload.agent.timezone,
    toolHintMaxLength: payload.agent.tool_hint_max_length,
  };
}

function webSearchFormFromPayload(
  payload: SettingsPayload,
  previous?: WebSearchSettingsUpdate,
): WebSearchSettingsUpdate {
  return {
    provider: payload.web_search.provider,
    apiKey: previous?.provider === payload.web_search.provider ? previous.apiKey ?? "" : "",
    baseUrl: payload.web_search.base_url ?? "",
    maxResults: payload.web_search.max_results,
    timeout: payload.web_search.timeout,
    useJinaReader: payload.web.fetch.use_jina_reader,
  };
}

type WebSearchProviderOption = SettingsPayload["web_search"]["providers"][number];

function webSearchProviderAcceptsApiKey(provider?: WebSearchProviderOption): boolean {
  return provider?.credential === "api_key" || provider?.credential === "optional_api_key";
}

function webSearchProviderRequiresApiKey(provider?: WebSearchProviderOption): boolean {
  return provider?.credential === "api_key";
}

function imageGenerationFormFromPayload(payload: SettingsPayload): ImageGenerationSettingsUpdate {
  return {
    enabled: payload.image_generation.enabled,
    provider: payload.image_generation.provider,
    model: payload.image_generation.model,
    defaultAspectRatio: payload.image_generation.default_aspect_ratio,
    defaultImageSize: payload.image_generation.default_image_size,
    maxImagesPerTurn: payload.image_generation.max_images_per_turn,
  };
}

function transcriptionFormFromPayload(payload: SettingsPayload): TranscriptionSettingsUpdate {
  const transcription = payload.transcription ?? DEFAULT_TRANSCRIPTION_SETTINGS;
  return {
    enabled: transcription.enabled,
    provider: transcription.provider,
    model: transcription.model,
    language: transcription.language ?? "",
    maxDurationSec: transcription.max_duration_sec,
    maxUploadMb: transcription.max_upload_mb,
  };
}

function networkSafetyFormFromPayload(payload: SettingsPayload): NetworkSafetySettingsUpdate {
  return {
    webuiAllowLocalServiceAccess:
      payload.advanced.webui_allow_local_service_access ??
      payload.advanced.allow_local_preview_access ??
      true,
    webuiDefaultAccessMode: visibleWebuiDefaultAccessMode(
      payload.advanced.webui_default_access_mode,
    ),
  };
}

function pendingRestartSectionsFromPayload(payload: SettingsPayload): PendingRestartSections {
  const sections = payload.restart_required_sections ?? [];
  return {
    runtime: sections.includes("runtime"),
    browser: sections.includes("browser"),
    image: sections.includes("image"),
  };
}

export function SettingsView({
  theme,
  initialSection = "overview",
  initialSettings = null,
  showSidebar = true,
  onToggleTheme,
  onBackToChat,
  onModelNameChange,
  onSettingsChange,
  skills = [],
  onWorkspaceSettingsChange,
  onSectionChange,
  onLogout,
  onRestart,
  onNativeEngineRestart,
  isRestarting = false,
  hostChromeInset = false,
}: SettingsViewProps) {
  const { t } = useTranslation();
  const { getToken, token } = useClient();
  const pageVisible = usePageVisibility();
  const remoteBrowserAccess =
    typeof window !== "undefined" && !isLoopbackHost(window.location.hostname);
  const [settings, setSettings] = useState<SettingsPayload | null>(() => initialSettings);
  const [cliApps, setCliApps] = useState<CliAppsPayload | null>(null);
  const [nanobotFeatures, setNanobotFeatures] = useState<NanobotFeaturesPayload | null>(null);
  const featureCatalog = nanobotFeatures?.features ?? [];
  const [mcpPresets, setMcpPresets] = useState<McpPresetsPayload | null>(null);
  const [automations, setAutomations] = useState<AutomationsPayload | null>(null);
  const [loading, setLoading] = useState(() => initialSettings === null);
  const [cliAppsLoading, setCliAppsLoading] = useState(true);
  const [nanobotFeaturesLoading, setNanobotFeaturesLoading] = useState(true);
  const [mcpPresetsLoading, setMcpPresetsLoading] = useState(true);
  const [automationsLoading, setAutomationsLoading] = useState(false);
  const [saving, setSaving] = useState(false);
  const [modelPresetCreating, setModelPresetCreating] = useState(false);
  const [modelConfigurationSaving, setModelConfigurationSaving] = useState(false);
  const [modelCallOrderSaving, setModelCallOrderSaving] = useState(false);
  const [modelMigrationSaving, setModelMigrationSaving] = useState(false);
  const [modelPresetPendingDelete, setModelPresetPendingDelete] =
    useState<SettingsPayload["model_presets"][number] | null>(null);
  const modelPresetBeforeCreateRef = useRef<string | null>(null);
  const [cliAppsAction, setCliAppsAction] = useState<string | null>(null);
  const [nanobotFeatureAction, setNanobotFeatureAction] = useState<string | null>(null);
  const [nanobotFeatureConfirm, setNanobotFeatureConfirm] = useState<NanobotFeatureInfo | null>(null);
  const [mcpPresetAction, setMcpPresetAction] = useState<string | null>(null);
  const [providerSaving, setProviderSaving] = useState<string | null>(null);
  const [providerOAuthFlow, setProviderOAuthFlow] =
    useState<ProviderOAuthAuthorizationRequired | null>(null);
  const providerOAuthFlowRef = useRef<ProviderOAuthAuthorizationRequired | null>(null);
  const [providerOAuthResponse, setProviderOAuthResponse] = useState("");
  const [providerOAuthCompleting, setProviderOAuthCompleting] = useState(false);
  const [providerOAuthDialogError, setProviderOAuthDialogError] = useState<string | null>(null);
  const [webSearchSaving, setWebSearchSaving] = useState(false);
  const [imageGenerationSaving, setImageGenerationSaving] = useState(false);
  const [transcriptionSaving, setTranscriptionSaving] = useState(false);
  const [networkSafetySaving, setNetworkSafetySaving] = useState(false);
  const [apiService, setApiService] = useState<ApiServicePayload | null>(null);
  const [apiServiceLoading, setApiServiceLoading] = useState(false);
  const [apiServiceAction, setApiServiceAction] = useState<"start" | "stop" | null>(null);
  const [apiServiceError, setApiServiceError] = useState<string | null>(null);
  const [hostEngineApplying, setHostEngineApplying] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [activeSection, setActiveSection] = useState<SettingsSectionKey>(initialSection);
  const [expandedProvider, setExpandedProvider] = useState<string | null>(null);
  const [appsQuery, setAppsQuery] = useState("");
  const [channelsQuery, setChannelsQuery] = useState("");
  const [automationsQuery, setAutomationsQuery] = useState("");
  const [automationsFilter, setAutomationsFilter] = useState<AutomationFilter>("all");
  const [automationsSort, setAutomationsSort] = useState<AutomationSort>("next");
  const [cliAppsMessage, setCliAppsMessage] = useState<string | null>(null);
  const [cliAppsError, setCliAppsError] = useState<string | null>(null);
  const [nanobotFeaturesError, setNanobotFeaturesError] = useState<string | null>(null);
  const [cliAppsFocusName, setCliAppsFocusName] = useState<string | null>(null);
  const [appsKindFilter, setAppsKindFilter] = useState<AppsKindFilter>("cli");
  const [mcpMessage, setMcpMessage] = useState<string | null>(null);
  const [mcpError, setMcpError] = useState<string | null>(null);
  const [automationsError, setAutomationsError] = useState<string | null>(null);
  const [automationAction, setAutomationAction] = useState<string | null>(null);
  const [automationPendingDelete, setAutomationPendingDelete] =
    useState<SessionAutomationJob | null>(null);
  const [automationPendingEdit, setAutomationPendingEdit] =
    useState<SessionAutomationJob | null>(null);
  const [mcpFieldValues, setMcpFieldValues] = useState<Record<string, Record<string, string>>>({});
  const [customMcpForm, setCustomMcpForm] = useState<CustomMcpForm>(DEFAULT_CUSTOM_MCP_FORM);
  const [mcpConfigImport, setMcpConfigImport] = useState("");
  const [providerForms, setProviderForms] = useState<Record<string, ProviderForm>>({});
  const [visibleProviderKeys, setVisibleProviderKeys] = useState<Record<string, boolean>>({});
  const [editingProviderKeys, setEditingProviderKeys] = useState<Record<string, boolean>>({});
  const [pendingRestartSections, setPendingRestartSections] = useState<PendingRestartSections>(
    EMPTY_PENDING_RESTART_SECTIONS,
  );
  const [localPrefs, setLocalPrefs] = useState<LocalPreferences>(() => readLocalPreferences());
  const [webSearchForm, setWebSearchForm] = useState<WebSearchSettingsUpdate>(() =>
    initialSettings ? webSearchFormFromPayload(initialSettings) : DEFAULT_WEB_SEARCH_FORM,
  );
  const [imageGenerationForm, setImageGenerationForm] = useState<ImageGenerationSettingsUpdate>(
    () =>
      initialSettings
        ? imageGenerationFormFromPayload(initialSettings)
        : DEFAULT_IMAGE_GENERATION_FORM,
  );
  const [transcriptionForm, setTranscriptionForm] = useState<TranscriptionSettingsUpdate>(
    () => initialSettings ? transcriptionFormFromPayload(initialSettings) : DEFAULT_TRANSCRIPTION_FORM,
  );
  const [networkSafetyForm, setNetworkSafetyForm] = useState<NetworkSafetySettingsUpdate>(() =>
    initialSettings ? networkSafetyFormFromPayload(initialSettings) : DEFAULT_NETWORK_SAFETY_FORM,
  );

  useEffect(() => {
    setActiveSection(initialSection);
  }, [initialSection]);

  const selectSection = useCallback(
    (section: SettingsSectionKey) => {
      setActiveSection(section);
      onSectionChange?.(section);
    },
    [onSectionChange],
  );
  const [webSearchKeyVisible, setWebSearchKeyVisible] = useState(false);
  const [webSearchKeyEditing, setWebSearchKeyEditing] = useState(false);
  const [form, setForm] = useState<AgentSettingsDraft>(() =>
    initialSettings ? agentDraftFromPayload(initialSettings) : DEFAULT_AGENT_SETTINGS_DRAFT,
  );
  const [modelCallOrder, setModelCallOrder] = useState<string[]>(
    () => initialSettings?.model_call_order ?? [],
  );

  const applyPayload = useCallback(
    (
      payload: SettingsPayload,
      options: { preserveAgentForm?: boolean } = {},
    ) => {
      setSettings(payload);
      if (!options.preserveAgentForm) {
        setForm(agentDraftFromPayload(payload));
        setModelPresetCreating(false);
      }
      setModelCallOrder(payload.model_call_order ?? []);
      setWebSearchForm((prev) => webSearchFormFromPayload(payload, prev));
      setImageGenerationForm(imageGenerationFormFromPayload(payload));
      setTranscriptionForm(transcriptionFormFromPayload(payload));
      setNetworkSafetyForm(networkSafetyFormFromPayload(payload));
      if (payload.restart_required_sections) {
        setPendingRestartSections(pendingRestartSectionsFromPayload(payload));
      }
      onSettingsChange?.(payload);
    },
    [onSettingsChange],
  );

  const closeProviderOAuthFlow = useCallback(() => {
    providerOAuthFlowRef.current = null;
    setProviderOAuthFlow(null);
    setProviderOAuthResponse("");
    setProviderOAuthCompleting(false);
    setProviderOAuthDialogError(null);
  }, []);

  useEffect(() => {
    if (!providerOAuthFlow) return;
    let cancelled = false;
    let timer: number | null = null;
    const poll = async () => {
      try {
        const payload = await completeProviderOAuth(
          getToken(),
          providerOAuthFlow.provider,
          providerOAuthFlow.flow_id,
        );
        if (
          cancelled
          || providerOAuthFlowRef.current?.flow_id !== providerOAuthFlow.flow_id
        ) return;
        if (isProviderOAuthPending(payload)) {
          timer = window.setTimeout(() => void poll(), 1000);
          return;
        }
        applyPayload(payload);
        setExpandedProvider(providerOAuthFlow.provider);
        setError(null);
        closeProviderOAuthFlow();
      } catch (err) {
        if (
          cancelled
          || providerOAuthFlowRef.current?.flow_id !== providerOAuthFlow.flow_id
        ) return;
        setError((err as Error).message);
        closeProviderOAuthFlow();
      }
    };
    timer = window.setTimeout(() => void poll(), 1000);
    return () => {
      cancelled = true;
      if (timer !== null) window.clearTimeout(timer);
    };
  }, [applyPayload, closeProviderOAuthFlow, getToken, providerOAuthFlow]);

  useEffect(() => {
    if (!initialSettings || settings !== null) return;
    applyPayload(initialSettings);
    setLoading(false);
  }, [applyPayload, initialSettings, settings]);

  useEffect(() => {
    let cancelled = false;
    const showLoading = settings === null;
    if (showLoading) setLoading(true);
    fetchSettings(getToken())
      .then((payload) => {
        if (!cancelled) {
          applyPayload(payload);
          setError(null);
        }
      })
      .catch((err) => {
        if (!cancelled && showLoading) setError((err as Error).message);
      })
      .finally(() => {
        if (!cancelled) setLoading(false);
      });
    return () => {
      cancelled = true;
    };
  }, [applyPayload, getToken]);

  const hasSettings = settings !== null;
  useEffect(() => {
    if (activeSection !== "overview" || !hasSettings || !pageVisible) return;
    let cancelled = false;
    let refreshing = false;
    const refresh = async () => {
      if (refreshing) return;
      refreshing = true;
      try {
        const usage = await fetchSettingsUsage(getToken());
        if (!cancelled) {
          setSettings((current) => (current ? { ...current, usage } : current));
        }
      } catch {
        // Usage is best-effort telemetry; the settings snapshot remains usable.
      } finally {
        refreshing = false;
      }
    };
    void refresh();
    const interval = window.setInterval(() => void refresh(), 5000);
    const onFocus = () => void refresh();
    window.addEventListener("focus", onFocus);
    return () => {
      cancelled = true;
      window.clearInterval(interval);
      window.removeEventListener("focus", onFocus);
    };
  }, [activeSection, getToken, hasSettings, pageVisible]);

  useEffect(() => {
    if (activeSection !== "apps") return;
    let cancelled = false;
    let retry: number | null = null;
    let retryCount = 0;
    const loadCliApps = (showLoading: boolean) => {
      if (showLoading) setCliAppsLoading(true);
      fetchCliApps(getToken())
        .then((payload) => {
          if (cancelled) return;
          if (payload.catalog_refresh_pending && retryCount < CLI_APPS_REFRESH_MAX_RETRIES) {
            retryCount += 1;
            retry = window.setTimeout(() => {
              retry = null;
              loadCliApps(false);
            }, CLI_APPS_REFRESH_RETRY_MS);
          }
          setCliApps(payload);
          setCliAppsError(null);
          setCliAppsLoading(false);
        })
        .catch((err) => {
          if (!cancelled) {
            setCliAppsError((err as Error).message);
            setCliAppsLoading(false);
          }
        });
    };
    loadCliApps(true);
    return () => {
      cancelled = true;
      if (retry !== null) window.clearTimeout(retry);
    };
  }, [activeSection, getToken]);

  useEffect(() => {
    if (
      !pageVisible
      || !["channels", "models", "browser", "runtime"].includes(activeSection)
    ) {
      return;
    }
    let cancelled = false;
    let refreshing = false;
    const refresh = async (showLoading = false): Promise<void> => {
      if (refreshing) return;
      refreshing = true;
      if (showLoading) setNanobotFeaturesLoading(true);
      try {
        const payload = await fetchNanobotFeatures(getToken());
        if (!cancelled) {
          setNanobotFeatures(payload);
          setNanobotFeaturesError(null);
        }
      } catch (err) {
        const message = (err as Error).message;
        if (!cancelled && message !== "HTTP 404") setNanobotFeaturesError(message);
      } finally {
        refreshing = false;
        if (!cancelled && showLoading) setNanobotFeaturesLoading(false);
      }
    };
    void refresh(true);
    const interval = activeSection === "channels"
      ? window.setInterval(() => void refresh(false), 5000)
      : null;
    const refreshOnFocus = () => {
      if (activeSection === "channels" && document.visibilityState !== "hidden") {
        void refresh(false);
      }
    };
    window.addEventListener("focus", refreshOnFocus);
    document.addEventListener("visibilitychange", refreshOnFocus);
    return () => {
      cancelled = true;
      if (interval !== null) window.clearInterval(interval);
      window.removeEventListener("focus", refreshOnFocus);
      document.removeEventListener("visibilitychange", refreshOnFocus);
    };
  }, [activeSection, getToken, pageVisible]);

  useEffect(() => {
    if (activeSection !== "runtime") return;
    let cancelled = false;
    setApiServiceLoading(true);
    fetchApiService(getToken())
      .then((payload) => {
        if (!cancelled) {
          setApiService(payload);
          setApiServiceError(null);
        }
      })
      .catch((err) => {
        if (!cancelled) setApiServiceError((err as Error).message);
      })
      .finally(() => {
        if (!cancelled) setApiServiceLoading(false);
      });
    return () => {
      cancelled = true;
    };
  }, [activeSection, getToken]);

  useEffect(() => {
    if (activeSection !== "apps") return;
    let cancelled = false;
    setMcpPresetsLoading(true);
    fetchMcpPresets(getToken())
      .then((payload) => {
        if (!cancelled) {
          setMcpPresets(payload);
          setMcpError(null);
        }
      })
      .catch((err) => {
        if (!cancelled) setMcpError((err as Error).message);
      })
      .finally(() => {
        if (!cancelled) setMcpPresetsLoading(false);
      });
    return () => {
      cancelled = true;
    };
  }, [activeSection, getToken]);

  const refreshAutomations = useCallback(
    async (showLoading = false) => {
      if (showLoading) setAutomationsLoading(true);
      try {
        const payload = await fetchAutomations(getToken());
        setAutomations(payload);
        setAutomationsError(null);
      } catch (err) {
        setAutomationsError((err as Error).message);
      } finally {
        if (showLoading) setAutomationsLoading(false);
      }
    },
    [getToken],
  );

  useEffect(() => {
    if (activeSection !== "automations" || !pageVisible) return;
    let cancelled = false;
    let refreshing = false;
    const refresh = async (showLoading = false) => {
      if (cancelled || refreshing) return;
      refreshing = true;
      if (showLoading) setAutomationsLoading(true);
      try {
        const payload = await fetchAutomations(getToken());
        if (cancelled) return;
        setAutomations(payload);
        setAutomationsError(null);
      } catch (err) {
        if (!cancelled) setAutomationsError((err as Error).message);
      } finally {
        refreshing = false;
        if (!cancelled && showLoading) setAutomationsLoading(false);
      }
    };
    void refresh(true);
    const interval = window.setInterval(() => void refresh(false), 5000);
    const refreshOnFocus = () => void refresh(false);
    window.addEventListener("focus", refreshOnFocus);
    return () => {
      cancelled = true;
      window.clearInterval(interval);
      window.removeEventListener("focus", refreshOnFocus);
    };
  }, [activeSection, getToken, pageVisible]);

  useEffect(() => {
    writeLocalPreferences(localPrefs);
  }, [localPrefs]);

  useEffect(() => {
    if (!settings) return;
    setProviderForms((prev) => {
      const next = { ...prev };
      for (const provider of settings.providers) {
        next[provider.name] = next[provider.name] ?? providerFormFromRow(provider);
      }
      return next;
    });
  }, [settings]);

  const modelDirty = useMemo(() => {
    if (!settings) return false;
    const selectedPreset = settings.model_presets.find(
      (preset) => !preset.is_default && preset.name === form.modelPreset,
    );
    if (!selectedPreset) return false;
    return (
      form.model !== selectedPreset.model ||
      form.provider !== selectedPreset.provider ||
      form.maxTokens !== selectedPreset.max_tokens ||
      form.contextWindowTokens !== normalizeContextWindowTokens(selectedPreset.context_window_tokens) ||
      form.temperature !== selectedPreset.temperature ||
      form.reasoningEffort !== (selectedPreset.reasoning_effort ?? "") ||
      form.presetLabel.trim() !== selectedPreset.label
    );
  }, [form, settings]);

  const runtimeDirty = useMemo(() => {
    if (!settings) return false;
    return form.timezone !== settings.agent.timezone;
  }, [form, settings]);

  const imageGenerationDirty = useMemo(() => {
    if (!settings) return false;
    return (
      imageGenerationForm.enabled !== settings.image_generation.enabled ||
      imageGenerationForm.provider !== settings.image_generation.provider ||
      imageGenerationForm.model !== settings.image_generation.model ||
      imageGenerationForm.defaultAspectRatio !== settings.image_generation.default_aspect_ratio ||
      imageGenerationForm.defaultImageSize !== settings.image_generation.default_image_size ||
      imageGenerationForm.maxImagesPerTurn !== settings.image_generation.max_images_per_turn
    );
  }, [imageGenerationForm, settings]);

  const transcriptionDirty = useMemo(() => {
    if (!settings) return false;
    const transcription = settings.transcription ?? DEFAULT_TRANSCRIPTION_SETTINGS;
    return (
      transcriptionForm.enabled !== transcription.enabled ||
      transcriptionForm.provider !== transcription.provider ||
      transcriptionForm.model !== transcription.model ||
      transcriptionForm.language !== (transcription.language ?? "") ||
      transcriptionForm.maxDurationSec !== transcription.max_duration_sec ||
      transcriptionForm.maxUploadMb !== transcription.max_upload_mb
    );
  }, [settings, transcriptionForm]);

  const networkSafetyDirty = useMemo(() => {
    if (!settings) return false;
    const currentLocalServiceAccess =
      settings.advanced.webui_allow_local_service_access ?? settings.advanced.allow_local_preview_access ?? true;
    const currentDefaultAccess = visibleWebuiDefaultAccessMode(settings.advanced.webui_default_access_mode);
    return (
      networkSafetyForm.webuiAllowLocalServiceAccess !== currentLocalServiceAccess ||
      networkSafetyForm.webuiDefaultAccessMode !== currentDefaultAccess
    );
  }, [networkSafetyForm, settings]);

  const configuredModelProviderOptions = useMemo(
    () =>
      settings?.providers
        .filter((provider) => provider.configured && provider.model_selectable !== false)
        .map((provider) => ({ name: provider.name, label: provider.label })) ?? [],
    [settings],
  );

  const hasPendingRestart = useMemo(
    () =>
      !!settings?.requires_restart ||
      pendingRestartSections.runtime ||
      pendingRestartSections.browser ||
      pendingRestartSections.image,
    [pendingRestartSections, settings?.requires_restart],
  );

  const restartViaSettingsSurface = useCallback(async () => {
    const isNativeHost = (settings?.surface ?? settings?.runtime_surface) === "native";
    if (
      isNativeHost &&
      settings?.runtime_capabilities?.can_restart_engine &&
      onNativeEngineRestart
    ) {
      setHostEngineApplying(true);
      try {
        const nextToken = await onNativeEngineRestart();
        const payload = await fetchSettings(nextToken);
        applyPayload(payload);
        setPendingRestartSections(EMPTY_PENDING_RESTART_SECTIONS);
        setError(null);
      } catch (err) {
        setError((err as Error).message);
      } finally {
        setHostEngineApplying(false);
      }
      return;
    }
    onRestart?.();
  }, [applyPayload, onNativeEngineRestart, onRestart, settings]);

  const maybeRestartHostEngine = useCallback(
    async (payload: RestartAwarePayload) => {
      const surface = payload.surface ?? payload.runtime_surface ?? settings?.surface ?? settings?.runtime_surface;
      const capabilities = payload.runtime_capabilities ?? settings?.runtime_capabilities;
      const isNativeHost = surface === "native";
      if (
        !payload.requires_restart ||
        !isNativeHost ||
        !capabilities?.can_restart_engine ||
        !onNativeEngineRestart
      ) {
        return;
      }
      setHostEngineApplying(true);
      try {
        const nextToken = await onNativeEngineRestart();
        const refreshed = await fetchSettings(nextToken);
        applyPayload(refreshed);
        setPendingRestartSections(EMPTY_PENDING_RESTART_SECTIONS);
        setError(null);
      } catch (err) {
        setError((err as Error).message);
      } finally {
        setHostEngineApplying(false);
      }
    },
    [applyPayload, onNativeEngineRestart, settings],
  );

  const saveModelSettings = async () => {
    if (
      !settings ||
      saving ||
      modelCallOrderSaving ||
      modelConfigurationSaving
    ) {
      return;
    }

    if (modelPresetCreating) {
      const label = form.presetLabel.trim();
      const provider = form.provider.trim();
      const model = form.model.trim();
      if (
        !label ||
        !provider ||
        !model ||
        form.maxTokens <= 0 ||
        form.contextWindowTokens <= 0 ||
        form.temperature < 0 ||
        form.temperature > 2
      ) {
        return;
      }
      setModelConfigurationSaving(true);
      try {
        const payload = await createModelConfiguration(token, {
          label,
          provider,
          model,
          maxTokens: form.maxTokens,
          contextWindowTokens: form.contextWindowTokens,
          temperature: form.temperature,
          reasoningEffort: form.reasoningEffort || null,
        });
        const createdPreset = payload.created_model_preset;
        const nextOrder = createdPreset ? [...modelCallOrder, createdPreset] : null;
        applyPayload(payload);
        if (createdPreset) {
          setForm(agentDraftFromPayload(payload, createdPreset));
        }

        let finalPayload = payload;
        if (nextOrder) {
          const orderedPayload = await updateModelCallOrder(token, nextOrder);
          applyPayload(orderedPayload);
          finalPayload = orderedPayload;
        }
        if (createdPreset) {
          setForm(agentDraftFromPayload(finalPayload, createdPreset));
        }
        modelPresetBeforeCreateRef.current = null;
        onModelNameChange(finalPayload.agent.model || null);
        setError(null);
      } catch (err) {
        setError((err as Error).message);
      } finally {
        setModelConfigurationSaving(false);
      }
      return;
    }

    if (!modelDirty) return;
    const selectedPreset = settings.model_presets.find(
      (preset) => !preset.is_default && preset.name === form.modelPreset,
    );
    if (!selectedPreset) return;
    const reasoningEffort = form.reasoningEffort || null;
    setSaving(true);
    try {
      const payload = await updateModelConfiguration(token, {
        name: selectedPreset.name,
        label:
          form.presetLabel.trim() !== selectedPreset.label
            ? form.presetLabel.trim()
            : undefined,
        model: form.model !== selectedPreset.model ? form.model : undefined,
        provider: form.provider !== selectedPreset.provider ? form.provider : undefined,
        maxTokens:
          form.maxTokens !== selectedPreset.max_tokens ? form.maxTokens : undefined,
        contextWindowTokens:
          form.contextWindowTokens !==
          normalizeContextWindowTokens(selectedPreset.context_window_tokens)
            ? form.contextWindowTokens
            : undefined,
        temperature:
          form.temperature !== selectedPreset.temperature ? form.temperature : undefined,
        reasoningEffort:
          reasoningEffort !== selectedPreset.reasoning_effort ? reasoningEffort : undefined,
      });
      applyPayload(payload);
      setForm(agentDraftFromPayload(payload, selectedPreset.name));
      onModelNameChange(payload.agent.model || null);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setSaving(false);
    }
  };

  const beginModelPresetCreation = () => {
    if (!settings || saving || modelCallOrderSaving || modelConfigurationSaving) return;
    const primaryPreset = settings.model_presets.find(
      (preset) => !preset.is_default && preset.name === settings.model_call_order?.[0],
    );
    const currentProvider = primaryPreset?.provider === "auto"
      ? primaryPreset.resolved_provider ?? settings.agent.resolved_provider
      : primaryPreset?.provider ?? settings.agent.provider;
    const provider =
      configuredModelProviderOptions.find((option) => option.name === currentProvider)?.name ??
      configuredModelProviderOptions[0]?.name ??
      "";
    modelPresetBeforeCreateRef.current = form.modelPreset;
    setForm((prev) => ({
      ...prev,
      modelPreset: "",
      presetLabel: "",
      provider,
      model: "",
      maxTokens: primaryPreset?.max_tokens ?? settings.agent.max_tokens,
      contextWindowTokens: normalizeContextWindowTokens(
        primaryPreset?.context_window_tokens ?? settings.agent.context_window_tokens,
      ),
      temperature: primaryPreset?.temperature ?? settings.agent.temperature,
      reasoningEffort: primaryPreset?.reasoning_effort ?? settings.agent.reasoning_effort ?? "",
    }));
    setModelPresetCreating(true);
  };

  const cancelModelPresetCreation = () => {
    if (!settings || modelConfigurationSaving) return;
    const previousPreset = modelPresetBeforeCreateRef.current;
    setModelPresetCreating(false);
    setForm(agentDraftFromPayload(settings, previousPreset ?? undefined));
    modelPresetBeforeCreateRef.current = null;
  };

  const changeModelCallOrder = async (nextOrder: string[]) => {
    const unchanged =
      nextOrder.length === modelCallOrder.length &&
      nextOrder.every((name, index) => name === modelCallOrder[index]);
    if (
      !settings ||
      saving ||
      modelCallOrderSaving ||
      modelConfigurationSaving ||
      nextOrder.length === 0 ||
      unchanged
    ) {
      return;
    }
    const previousOrder = [...modelCallOrder];
    setModelCallOrder(nextOrder);
    setModelCallOrderSaving(true);
    try {
      const payload = await updateModelCallOrder(token, nextOrder);
      applyPayload(payload, { preserveAgentForm: true });
      onModelNameChange(payload.agent.model || null);
      setError(null);
    } catch (err) {
      setModelCallOrder(previousOrder);
      setError((err as Error).message);
    } finally {
      setModelCallOrderSaving(false);
    }
  };

  const handleMigrateModelConfigurations = async () => {
    if (modelMigrationSaving) return;
    setModelMigrationSaving(true);
    try {
      const payload = await migrateModelConfigurations(token);
      applyPayload(payload);
      onModelNameChange(payload.agent.model || null);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setModelMigrationSaving(false);
    }
  };

  const handleDeleteModelConfiguration = async () => {
    if (
      !modelPresetPendingDelete ||
      saving ||
      modelCallOrderSaving ||
      modelConfigurationSaving
    ) {
      return;
    }
    setSaving(true);
    try {
      const payload = await deleteModelConfiguration(token, modelPresetPendingDelete.name);
      applyPayload(payload);
      setModelPresetPendingDelete(null);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setSaving(false);
    }
  };

  const saveRuntimeSettings = async () => {
    if (!settings || !runtimeDirty || saving) return;
    setSaving(true);
    try {
      const payload = await updateSettings(token, {
        timezone: form.timezone,
      });
      applyPayload(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
      }
      await onWorkspaceSettingsChange?.();
      await maybeRestartHostEngine(payload);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setSaving(false);
    }
  };

  const saveImageGenerationSettings = async () => {
    if (!settings || !imageGenerationDirty || imageGenerationSaving) return;
    setImageGenerationSaving(true);
    try {
      const payload = await updateImageGenerationSettings(token, imageGenerationForm);
      applyPayload(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, image: true }));
      }
      await maybeRestartHostEngine(payload);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setImageGenerationSaving(false);
    }
  };

  const saveTranscriptionSettings = async () => {
    if (!settings || !transcriptionDirty || transcriptionSaving) return;
    setTranscriptionSaving(true);
    try {
      const payload = await updateTranscriptionSettings(token, transcriptionForm);
      applyPayload(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, browser: true }));
      }
      await maybeRestartHostEngine(payload);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setTranscriptionSaving(false);
    }
  };

  const saveNetworkSafetySettings = async () => {
    if (!settings || !networkSafetyDirty || networkSafetySaving) return;
    setNetworkSafetySaving(true);
    try {
      const payload = await updateNetworkSafetySettings(token, networkSafetyForm);
      applyPayload(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
      }
      await maybeRestartHostEngine(payload);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setNetworkSafetySaving(false);
    }
  };

  const installCapabilities = async (names: string[]): Promise<boolean> => {
    const missing = names.filter(
      (name) => !featureCatalog.find((feature) => feature.name === name)?.installed,
    );
    if (!missing.length) return true;
    setNanobotFeatureAction(`enable:${names.join("+")}`);
    setNanobotFeaturesError(null);
    try {
      let latest = nanobotFeatures;
      for (const name of missing) {
        latest = await enableNanobotFeature(token, name);
        if (latest.requires_restart) {
          setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
        }
      }
      if (latest) setNanobotFeatures(latest);
      return true;
    } catch (err) {
      setNanobotFeaturesError((err as Error).message);
      return false;
    } finally {
      setNanobotFeatureAction(null);
    }
  };

  const handleApiServiceAction = async (
    action: "start" | "stop",
    values?: { host: string; port: number; timeout: number; apiKey?: string },
  ) => {
    if (apiServiceAction) return;
    setApiServiceAction(action);
    setApiServiceError(null);
    try {
      const payload = action === "start"
        ? await startApiService(token, values!)
        : await stopApiService(token);
      setApiService(payload);
      const refreshed = await fetchNanobotFeatures(token);
      setNanobotFeatures(refreshed);
      const nextSettings = await fetchSettings(token);
      applyPayload(nextSettings);
    } catch (err) {
      setApiServiceError((err as Error).message);
    } finally {
      setApiServiceAction(null);
    }
  };

  const saveProvider = async (providerName: string) => {
    if (providerSaving) return;
    const provider = settings?.providers.find((item) => item.name === providerName);
    if (!provider) return;
    const isOauthProvider = provider.auth_type === "oauth";
    const providerForm = providerForms[providerName] ?? providerFormFromRow(provider);
    const apiKey = providerForm.apiKey.trim();
    const apiKeyRequired = provider.api_key_required ?? true;
    if (!isOauthProvider && !provider.configured && apiKeyRequired && !apiKey) {
      setError(t("settings.byok.apiKeyRequired"));
      return;
    }
    setProviderSaving(providerName);
    try {
      const supportName = providerName === "bedrock"
        ? "bedrock"
        : providerName === "azure_openai"
          ? "azure"
          : null;
      if (supportName && !(await installCapabilities([supportName]))) return;
      const update: ProviderSettingsUpdate = { provider: providerName };
      if (!isOauthProvider) {
        update.apiKey = apiKey || undefined;
        update.apiBase = providerForm.apiBase.trim();
        if (provider.is_custom) update.displayName = providerForm.displayName.trim();
      }
      for (const field of provider.advanced_fields ?? []) {
        if (field === "api_type") update.apiType = providerForm.apiType;
        if (field === "proxy") update.proxy = providerForm.proxy.trim();
        if (field === "extra_headers") {
          update.extraHeaders = providerForm.extraHeaders.trim();
        }
        if (field === "extra_body") update.extraBody = providerForm.extraBody.trim();
        if (field === "extra_query") update.extraQuery = providerForm.extraQuery.trim();
        if (field === "thinking_style") {
          update.thinkingStyle = providerForm.thinkingStyle.trim();
        }
        if (field === "region") update.region = providerForm.region.trim();
        if (field === "profile") update.profile = providerForm.profile.trim();
      }
      const payload = await updateProviderSettings(token, update);
      applyPayload(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, image: true }));
      }
      await maybeRestartHostEngine(payload);
      setProviderForms((prev) => ({
        ...prev,
        [providerName]: {
          ...providerForm,
          displayName: providerForm.displayName.trim(),
          apiKey: "",
          apiBase: providerForm.apiBase.trim(),
          proxy: providerForm.proxy.trim(),
          thinkingStyle: providerForm.thinkingStyle.trim(),
          region: providerForm.region.trim(),
          profile: providerForm.profile.trim(),
        },
      }));
      setVisibleProviderKeys((prev) => ({ ...prev, [providerName]: false }));
      setEditingProviderKeys((prev) => ({ ...prev, [providerName]: false }));
      if (!isOauthProvider) setExpandedProvider(null);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setProviderSaving(null);
    }
  };

  const createCustomProvider = async (draft: CustomProviderDraft): Promise<boolean> => {
    if (providerSaving) return false;
    setProviderSaving(CUSTOM_PROVIDER_CREATION_KEY);
    try {
      const payload = await createProviderSettings(token, {
        name: draft.name.trim(),
        apiKey: draft.apiKey.trim() || undefined,
        apiBase: draft.apiBase.trim(),
        proxy: draft.proxy.trim(),
        extraHeaders: draft.extraHeaders.trim(),
        extraBody: draft.extraBody.trim(),
        extraQuery: draft.extraQuery.trim(),
        thinkingStyle: draft.thinkingStyle.trim(),
      });
      applyPayload(payload);
      setExpandedProvider(null);
      setError(null);
      return true;
    } catch (err) {
      setError((err as Error).message);
      return false;
    } finally {
      setProviderSaving(null);
    }
  };

  const runProviderOAuth = async (providerName: string, action: "login" | "logout") => {
    if (providerSaving) return;
    let popup: Window | null = null;
    if (
      action === "login"
      && providerName === "xai_grok"
      && !remoteBrowserAccess
    ) {
      try {
        popup = window.open("about:blank", "_blank");
        if (popup) popup.opener = null;
      } catch {
        popup = null;
      }
    }
    setProviderSaving(providerName);
    try {
      const payload =
        action === "login"
          ? await loginProviderOAuth(
              token,
              providerName,
              "",
              providerName === "openai_codex" && remoteBrowserAccess,
            )
          : await logoutProviderOAuth(token, providerName);
      if (isProviderOAuthAuthorizationRequired(payload)) {
        try {
          if (popup && !popup.closed) popup.location.href = payload.authorization_url;
        } catch {
          // The dialog keeps the authorization link available when the popup was closed.
        }
        providerOAuthFlowRef.current = payload;
        setProviderOAuthFlow(payload);
        setProviderOAuthResponse("");
        setProviderOAuthDialogError(null);
        setExpandedProvider(providerName);
        setError(null);
        return;
      }
      popup?.close();
      closeProviderOAuthFlow();
      applyPayload(payload);
      setExpandedProvider(providerName);
      setError(null);
    } catch (err) {
      popup?.close();
      setError((err as Error).message);
    } finally {
      setProviderSaving(null);
    }
  };

  const completeProviderOAuthResponse = async () => {
    const flow = providerOAuthFlowRef.current;
    const authorizationResponse = providerOAuthResponse.trim();
    if (!flow || !authorizationResponse || providerOAuthCompleting) return;
    setProviderOAuthCompleting(true);
    setProviderOAuthDialogError(null);
    try {
      const payload = await completeProviderOAuth(
        token,
        flow.provider,
        flow.flow_id,
        authorizationResponse,
      );
      if (providerOAuthFlowRef.current?.flow_id !== flow.flow_id) return;
      if (isProviderOAuthPending(payload)) return;
      applyPayload(payload);
      setExpandedProvider(flow.provider);
      setError(null);
      closeProviderOAuthFlow();
    } catch (err) {
      if (providerOAuthFlowRef.current?.flow_id === flow.flow_id) {
        setProviderOAuthDialogError((err as Error).message);
      }
    } finally {
      setProviderOAuthCompleting(false);
    }
  };

  const saveWebSearch = async () => {
    if (!settings || webSearchSaving) return;
    const provider = settings.web_search.providers.find((item) => item.name === webSearchForm.provider);
    if (!provider) return;
    const apiKey = webSearchForm.apiKey?.trim() ?? "";
    const baseUrl = webSearchForm.baseUrl?.trim() ?? "";
    const hasExistingSecret =
      webSearchProviderAcceptsApiKey(provider) &&
      webSearchForm.provider === settings.web_search.provider &&
      !!settings.web_search.api_key_hint;

    if (webSearchProviderRequiresApiKey(provider) && !apiKey && !hasExistingSecret) {
      setError(t("settings.byok.webSearch.apiKeyRequired"));
      return;
    }
    if (provider.credential === "base_url" && !baseUrl) {
      setError(t("settings.byok.webSearch.baseUrlRequired"));
      return;
    }

    setWebSearchSaving(true);
    try {
      if (provider.name === "olostep" && !(await installCapabilities(["olostep"]))) return;
      const webFetchRestartRequired =
        (webSearchForm.useJinaReader ?? settings.web.fetch.use_jina_reader) !==
        settings.web.fetch.use_jina_reader;
      const update: WebSearchSettingsUpdate = {
        provider: webSearchForm.provider,
        maxResults: webSearchForm.maxResults,
        timeout: webSearchForm.timeout,
        useJinaReader: webSearchForm.useJinaReader,
      };
      if (
        webSearchProviderAcceptsApiKey(provider) &&
        (apiKey || (provider.credential === "optional_api_key" && webSearchKeyEditing))
      ) {
        update.apiKey = apiKey;
      }
      if (provider.credential === "base_url") update.baseUrl = baseUrl;
      const payload = await updateWebSearchSettings(token, update);
      applyPayload(payload);
      if (payload.requires_restart || webFetchRestartRequired) {
        setPendingRestartSections((prev) => ({ ...prev, browser: true }));
      }
      await maybeRestartHostEngine(payload);
      setWebSearchForm((prev) => ({
        provider: payload.web_search.provider,
        apiKey: "",
        baseUrl: payload.web_search.base_url ?? prev.baseUrl ?? "",
        maxResults: payload.web_search.max_results,
        timeout: payload.web_search.timeout,
        useJinaReader: payload.web.fetch.use_jina_reader,
      }));
      setWebSearchKeyVisible(false);
      setWebSearchKeyEditing(false);
      setError(null);
    } catch (err) {
      setError((err as Error).message);
    } finally {
      setWebSearchSaving(false);
    }
  };

  const resetProviderDraft = useCallback((providerName: string) => {
    const provider = settings?.providers.find((item) => item.name === providerName);
    if (!provider) return;
    setProviderForms((prev) => ({
      ...prev,
      [providerName]: providerFormFromRow(provider),
    }));
    setVisibleProviderKeys((prev) => ({ ...prev, [providerName]: false }));
    setEditingProviderKeys((prev) => ({ ...prev, [providerName]: false }));
  }, [settings]);

  const handleToggleProvider = useCallback((providerName: string) => {
    if (expandedProvider) resetProviderDraft(expandedProvider);
    setExpandedProvider(expandedProvider === providerName ? null : providerName);
  }, [expandedProvider, resetProviderDraft]);

  const resetWebSearchDraft = useCallback(() => {
    if (!settings) return;
    setWebSearchForm({
      provider: settings.web_search.provider,
      apiKey: "",
      baseUrl: settings.web_search.base_url ?? "",
      maxResults: settings.web_search.max_results,
      timeout: settings.web_search.timeout,
      useJinaReader: settings.web.fetch.use_jina_reader,
    });
    setWebSearchKeyVisible(false);
    setWebSearchKeyEditing(false);
  }, [settings]);

  const handleWebSearchProviderChange = useCallback((provider: string) => {
    if (!settings) return;
    setWebSearchForm((prev) => ({
      provider,
      apiKey: "",
      baseUrl: provider === settings.web_search.provider ? settings.web_search.base_url ?? "" : "",
      maxResults: prev.maxResults ?? settings.web_search.max_results,
      timeout: prev.timeout ?? settings.web_search.timeout,
      useJinaReader: prev.useJinaReader ?? settings.web.fetch.use_jina_reader,
    }));
    setWebSearchKeyVisible(false);
    setWebSearchKeyEditing(false);
  }, [settings]);

  const toggleProviderKeyVisibility = (providerName: string) => {
    const isVisible = visibleProviderKeys[providerName];
    setVisibleProviderKeys((prev) => ({ ...prev, [providerName]: !isVisible }));
  };

  const toggleProviderKeyEditing = (providerName: string) => {
    setEditingProviderKeys((prev) => {
      const nextEditing = !prev[providerName];
      if (!nextEditing) {
        setProviderForms((forms) => ({
          ...forms,
          [providerName]: {
            ...(forms[providerName] ?? providerFormFromRow(
              settings?.providers.find((provider) => provider.name === providerName) ?? {
                name: providerName,
                label: providerName,
                configured: false,
              },
            )),
            apiKey: "",
          },
        }));
        setVisibleProviderKeys((visible) => ({ ...visible, [providerName]: false }));
      }
      return { ...prev, [providerName]: nextEditing };
    });
  };

  const handleCliAppAction = async (
    action: "install" | "update" | "uninstall" | "test",
    name: string,
  ) => {
    const key = `${action}:${name}`;
    setCliAppsAction(key);
    setCliAppsMessage(null);
    setCliAppsError(null);
    try {
      const payload = await runCliAppAction(token, action, name);
      setCliApps(payload);
      if (action !== "test") {
        notifyCliAppsChanged(payload);
      }
      setCliAppsMessage(payload.last_action?.message ?? null);
      setCliAppsFocusName(action === "uninstall" ? null : name);
    } catch (err) {
      setCliAppsError((err as Error).message);
    } finally {
      setCliAppsAction(null);
    }
  };

  const handleNanobotFeatureAction = async (
    action: "enable" | "disable",
    name: string,
    confirmed = false,
  ) => {
    const feature = featureCatalog.find((item) => item.name === name);
    if (action === "enable" && !confirmed && feature && !feature.installed && feature.install_supported) {
      setNanobotFeaturesError(null);
      setNanobotFeatureConfirm(feature);
      return;
    }
    const key = `${action}:${name}`;
    setNanobotFeatureAction(key);
    setNanobotFeatureConfirm(null);
    setNanobotFeaturesError(null);
    try {
      const payload = action === "enable"
        ? await enableNanobotFeature(token, name)
        : await disableNanobotFeature(token, name);
      setNanobotFeatures(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
      }
    } catch (err) {
      setNanobotFeaturesError((err as Error).message);
    } finally {
      setNanobotFeatureAction(null);
    }
  };

  const handleAutomationAction = async (
    action: AutomationAction,
    job: SessionAutomationJob,
  ) => {
    const key = `${action}:${job.id}`;
    setAutomationAction(key);
    setAutomationsError(null);
    try {
      const payload = await runAutomationAction(token, action, job.id);
      setAutomations(payload);
      if (action === "delete") setAutomationPendingDelete(null);
      if (action === "run") {
        window.setTimeout(() => void refreshAutomations(false), 1200);
        window.setTimeout(() => void refreshAutomations(false), 4000);
      }
    } catch (err) {
      setAutomationsError((err as Error).message);
    } finally {
      setAutomationAction(null);
    }
  };

  const handleAutomationEdit = async (
    job: SessionAutomationJob,
    values: AutomationUpdatePayload,
  ) => {
    const key = `update:${job.id}`;
    setAutomationAction(key);
    setAutomationsError(null);
    try {
      const payload = await updateAutomation(token, job.id, values);
      setAutomations(payload);
      setAutomationPendingEdit(null);
    } catch (err) {
      setAutomationsError((err as Error).message);
    } finally {
      setAutomationAction(null);
    }
  };

  const handleMcpPresetAction = async (
    action: "enable" | "remove" | "test",
    name: string,
    values: Record<string, string> = {},
  ) => {
    const key = `${action}:${name}`;
    setMcpPresetAction(key);
    setMcpMessage(null);
    setMcpError(null);
    try {
      const payload = await runMcpPresetAction(token, action, name, values);
      setMcpPresets(payload);
      setMcpMessage(payload.last_action?.message ?? null);
      if (action !== "test") {
        notifyMcpPresetsChanged(payload);
      }
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
      }
      await maybeRestartHostEngine(payload);
      if (action === "enable") {
        setMcpFieldValues((prev) => ({ ...prev, [name]: {} }));
      }
    } catch (err) {
      setMcpError((err as Error).message);
    } finally {
      setMcpPresetAction(null);
    }
  };

  const handleSaveCustomMcp = async () => {
    const name = customMcpForm.name.trim();
    const key = `custom:${name || "new"}`;
    setMcpPresetAction(key);
    setMcpMessage(null);
    setMcpError(null);
    try {
      const payload = await saveCustomMcpServer(token, {
        name,
        transport: customMcpForm.transport,
        command: customMcpForm.command,
        args: customMcpForm.args,
        url: customMcpForm.url,
        env: customMcpForm.env,
        headers: customMcpForm.headers,
        tool_timeout: customMcpForm.toolTimeout,
      });
      setMcpPresets(payload);
      setMcpMessage(payload.last_action?.message ?? null);
      notifyMcpPresetsChanged(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
      }
      await maybeRestartHostEngine(payload);
      setCustomMcpForm((prev) => ({ ...DEFAULT_CUSTOM_MCP_FORM, transport: prev.transport }));
    } catch (err) {
      setMcpError((err as Error).message);
    } finally {
      setMcpPresetAction(null);
    }
  };

  const handleImportMcpConfig = async () => {
    setMcpPresetAction("import");
    setMcpMessage(null);
    setMcpError(null);
    try {
      const payload = await importMcpConfig(token, mcpConfigImport);
      setMcpPresets(payload);
      setMcpMessage(payload.last_action?.message ?? null);
      notifyMcpPresetsChanged(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
      }
      await maybeRestartHostEngine(payload);
      setMcpConfigImport("");
    } catch (err) {
      setMcpError((err as Error).message);
    } finally {
      setMcpPresetAction(null);
    }
  };

  const handleMcpToolsChange = async (name: string, enabledTools: string[]) => {
    setMcpPresetAction(`tools:${name}`);
    setMcpMessage(null);
    setMcpError(null);
    try {
      const payload = await updateMcpServerTools(token, name, enabledTools);
      setMcpPresets(payload);
      setMcpMessage(payload.last_action?.message ?? null);
      notifyMcpPresetsChanged(payload);
      if (payload.requires_restart) {
        setPendingRestartSections((prev) => ({ ...prev, runtime: true }));
      }
      await maybeRestartHostEngine(payload);
    } catch (err) {
      setMcpError((err as Error).message);
    } finally {
      setMcpPresetAction(null);
    }
  };

  const renderSection = () => {
    if (!settings) return null;
    switch (activeSection) {
      case "overview":
        return (
          <OverviewSettings
            settings={settings}
            requiresRestart={hasPendingRestart}
            showBrandLogos={localPrefs.brandLogos}
            onSelectSection={selectSection}
          />
        );
      case "appearance":
        return (
          <AppearanceSettings
            theme={theme}
            onToggleTheme={onToggleTheme}
            localPrefs={localPrefs}
            onChangeLocalPrefs={setLocalPrefs}
          />
        );
      case "models":
        return (
          <div className="space-y-8">
            <ModelsSettings
              token={token}
              form={form}
              setForm={setForm}
              settings={settings}
              dirty={modelDirty}
              creating={modelPresetCreating}
              creatingSaving={modelConfigurationSaving}
              callOrder={modelCallOrder}
              saving={saving}
              orderSaving={modelCallOrderSaving || modelConfigurationSaving}
              migrationSaving={modelMigrationSaving}
              showBrandLogos={localPrefs.brandLogos}
              providerSaving={providerSaving}
              onChangeCallOrder={changeModelCallOrder}
              onProviderOAuthLogin={(provider) => runProviderOAuth(provider, "login")}
              onSave={saveModelSettings}
              onMigrate={handleMigrateModelConfigurations}
              onBeginCreate={beginModelPresetCreation}
              onCancelCreate={cancelModelPresetCreation}
              onSelectConfiguration={() => {
                setModelPresetCreating(false);
                modelPresetBeforeCreateRef.current = null;
              }}
              onDeleteConfiguration={setModelPresetPendingDelete}
            />
            <ProvidersSettings
              settings={settings}
              nanobotFeatures={nanobotFeatures}
              featureAction={nanobotFeatureAction}
              capabilityError={nanobotFeaturesError}
              expandedProvider={expandedProvider}
              providerForms={providerForms}
              visibleProviderKeys={visibleProviderKeys}
              editingProviderKeys={editingProviderKeys}
              providerSaving={providerSaving}
              showBrandLogos={localPrefs.brandLogos}
              remoteBrowserAccess={remoteBrowserAccess}
              onToggleProvider={handleToggleProvider}
              onToggleProviderKey={toggleProviderKeyVisibility}
              onToggleProviderKeyEditing={toggleProviderKeyEditing}
              onChangeProviderForm={(provider, value) =>
                setProviderForms((prev) => ({
                  ...prev,
                  [provider]: {
                    ...(prev[provider] ?? providerFormFromRow(
                      settings.providers.find((row) => row.name === provider) ?? {
                        name: provider,
                        label: provider,
                        configured: false,
                      },
                    )),
                    ...value,
                  },
                }))
              }
              onSaveProvider={saveProvider}
              onCreateCustomProvider={createCustomProvider}
              onProviderOAuthLogin={(provider) => runProviderOAuth(provider, "login")}
              onProviderOAuthLogout={(provider) => runProviderOAuth(provider, "logout")}
              imageProviderRestartPending={pendingRestartSections.image || pendingRestartSections.runtime}
              onRestart={restartViaSettingsSurface}
              isRestarting={isRestarting || hostEngineApplying}
            />
          </div>
        );
      case "image":
        return (
          <ImageGenerationSettings
            token={token}
            settings={settings}
            form={imageGenerationForm}
            dirty={imageGenerationDirty}
            saving={imageGenerationSaving}
            onChangeForm={setImageGenerationForm}
            onSave={saveImageGenerationSettings}
            onOpenProviders={() => selectSection("models")}
            showBrandLogos={localPrefs.brandLogos}
            onRestart={restartViaSettingsSurface}
            isRestarting={isRestarting || hostEngineApplying}
            requiresRestartPending={pendingRestartSections.image}
          />
        );
      case "voice":
        return (
          <TranscriptionSettings
            settings={settings}
            form={transcriptionForm}
            dirty={transcriptionDirty}
            saving={transcriptionSaving}
            onChangeForm={setTranscriptionForm}
            onSave={saveTranscriptionSettings}
            onOpenProviders={() => selectSection("models")}
            showBrandLogos={localPrefs.brandLogos}
            onRestart={restartViaSettingsSurface}
            isRestarting={isRestarting || hostEngineApplying}
            requiresRestartPending={pendingRestartSections.browser}
          />
        );
      case "browser":
        return (
          <WebSettings
            settings={settings}
            form={webSearchForm}
            keyVisible={webSearchKeyVisible}
            keyEditing={webSearchKeyEditing}
            saving={webSearchSaving}
            onChangeForm={setWebSearchForm}
            onChangeProvider={handleWebSearchProviderChange}
            onToggleKey={() => setWebSearchKeyVisible((visible) => !visible)}
            onToggleKeyEditing={() => {
              setWebSearchKeyEditing((editing) => !editing);
              setWebSearchKeyVisible(false);
              setWebSearchForm((prev) => ({ ...prev, apiKey: "" }));
            }}
            onReset={resetWebSearchDraft}
            onSave={saveWebSearch}
            showBrandLogos={localPrefs.brandLogos}
            onRestart={restartViaSettingsSurface}
            isRestarting={isRestarting || hostEngineApplying}
            requiresRestartPending={pendingRestartSections.browser}
            olostepFeature={featureCatalog.find((feature) => feature.name === "olostep")}
            olostepInstalling={nanobotFeatureAction === "enable:olostep"}
            capabilityError={nanobotFeaturesError}
          />
        );
      case "channels":
        return (
          <ChannelsSettings
            token={token}
            nanobotFeatures={nanobotFeatures}
            loading={nanobotFeaturesLoading}
            query={channelsQuery}
            actionKey={nanobotFeatureAction}
            chatAppsDocsUrl={settings.docs?.chat_apps_url}
            showBrandLogos={localPrefs.brandLogos}
            error={nanobotFeaturesError}
            requiresRestartPending={pendingRestartSections.runtime}
            onQueryChange={setChannelsQuery}
            onAction={handleNanobotFeatureAction}
            onFeaturesUpdate={setNanobotFeatures}
            onDismissStatus={() => {
              setNanobotFeaturesError(null);
            }}
            onRestart={restartViaSettingsSurface}
            isRestarting={isRestarting || hostEngineApplying}
          />
        );
      case "apps":
        return (
          <AppsCatalogSettings
            cliApps={cliApps}
            mcpPresets={mcpPresets}
            cliAppsLoading={cliAppsLoading}
            mcpPresetsLoading={mcpPresetsLoading}
            query={appsQuery}
            filter={appsKindFilter}
            cliActionKey={cliAppsAction}
            mcpActionKey={mcpPresetAction}
            cliMessage={cliAppsMessage}
            cliError={cliAppsError}
            cliFocusName={cliAppsFocusName}
            mcpMessage={mcpMessage}
            mcpError={mcpError}
            mcpFieldValues={mcpFieldValues}
            customMcpForm={customMcpForm}
            mcpConfigImport={mcpConfigImport}
            showBrandLogos={localPrefs.brandLogos}
            requiresRestartPending={pendingRestartSections.runtime}
            onQueryChange={setAppsQuery}
            onFilterChange={setAppsKindFilter}
            onCliAction={handleCliAppAction}
            onMcpAction={handleMcpPresetAction}
            onDismissStatus={() => {
              setCliAppsMessage(null);
              setCliAppsError(null);
              setMcpMessage(null);
              setMcpError(null);
            }}
            onBackToChat={onBackToChat}
            onMcpFieldChange={(presetName, fieldName, value) => {
              setMcpFieldValues((prev) => ({
                ...prev,
                [presetName]: {
                  ...(prev[presetName] ?? {}),
                  [fieldName]: value,
                },
              }));
            }}
            onCustomMcpFormChange={setCustomMcpForm}
            onMcpConfigImportChange={setMcpConfigImport}
            onSaveCustomMcp={handleSaveCustomMcp}
            onImportMcpConfig={handleImportMcpConfig}
            onMcpToolsChange={handleMcpToolsChange}
            onRestart={restartViaSettingsSurface}
            isRestarting={isRestarting || hostEngineApplying}
          />
        );
      case "automations":
        return (
          <AutomationsSettings
            payload={automations}
            loading={automationsLoading}
            query={automationsQuery}
            filter={automationsFilter}
            sort={automationsSort}
            actionKey={automationAction}
            error={automationsError}
            onQueryChange={setAutomationsQuery}
            onFilterChange={setAutomationsFilter}
            onSortChange={setAutomationsSort}
            onAction={handleAutomationAction}
            onRequestEdit={setAutomationPendingEdit}
            onRequestDelete={setAutomationPendingDelete}
          />
        );
      case "skills":
        return <SkillsCatalogSettings skills={skills} />;
      case "runtime":
        return (
          <RuntimeSettings
            form={form}
            setForm={setForm}
            settings={settings}
            dirty={runtimeDirty}
            saving={saving}
            onSave={saveRuntimeSettings}
            onRestart={restartViaSettingsSurface}
            isRestarting={isRestarting || hostEngineApplying}
            requiresRestartPending={pendingRestartSections.runtime}
            apiService={apiService}
            apiServiceLoading={apiServiceLoading}
            apiServiceAction={apiServiceAction}
            apiServiceError={apiServiceError}
            langfuseFeature={featureCatalog.find((feature) => feature.name === "langfuse")}
            capabilitiesLoading={nanobotFeaturesLoading}
            capabilityAction={nanobotFeatureAction}
            capabilityError={nanobotFeaturesError}
            onApiServiceAction={handleApiServiceAction}
            onInstallCapability={(name) => void installCapabilities([name])}
          />
        );
      case "advanced":
        return (
          <AdvancedSettings
            form={networkSafetyForm}
            dirty={networkSafetyDirty}
            saving={networkSafetySaving}
            isNativeHostSurface={(settings.surface ?? settings.runtime_surface) === "native"}
            onChangeForm={setNetworkSafetyForm}
            onSave={saveNetworkSafetySettings}
            onRestart={restartViaSettingsSurface}
            isRestarting={isRestarting || hostEngineApplying}
            requiresRestartPending={pendingRestartSections.runtime}
          />
        );
      default:
        return null;
    }
  };

  return (
    <div className="flex min-h-0 flex-1 flex-col overflow-hidden bg-settings-canvas lg:flex-row">
      {showSidebar ? (
        <SettingsSidebar
          activeSection={activeSection}
          onSelectSection={selectSection}
          onBackToChat={onBackToChat}
          onLogout={onLogout}
          hostChromeInset={hostChromeInset}
        />
      ) : null}

      <ModelPresetDeleteDialog
        preset={modelPresetPendingDelete}
        deleting={saving}
        onOpenChange={(open) => {
          if (!open) setModelPresetPendingDelete(null);
        }}
        onConfirm={handleDeleteModelConfiguration}
      />

      <ProviderOAuthLoginDialog
        flow={providerOAuthFlow}
        providerLabel={
          providerOAuthFlow
            ? settings?.providers.find((provider) => provider.name === providerOAuthFlow.provider)
              ?.label ?? providerOAuthFlow.provider
            : ""
        }
        authorizationResponse={providerOAuthResponse}
        completing={providerOAuthCompleting}
        error={providerOAuthDialogError}
        remoteBrowserAccess={remoteBrowserAccess}
        onAuthorizationResponseChange={(value) => {
          setProviderOAuthResponse(value);
          setProviderOAuthDialogError(null);
        }}
        onOpenAuthorization={() => {
          if (!providerOAuthFlow) return;
          const opened = window.open(
            providerOAuthFlow.authorization_url,
            "_blank",
            "noopener,noreferrer",
          );
          if (opened) opened.opener = null;
        }}
        onComplete={() => void completeProviderOAuthResponse()}
        onClose={closeProviderOAuthFlow}
      />

      <NanobotFeatureInstallDialog
        feature={nanobotFeatureConfirm}
        installing={nanobotFeatureAction === `enable:${nanobotFeatureConfirm?.name ?? ""}`}
        onOpenChange={(open) => {
          if (!open) setNanobotFeatureConfirm(null);
        }}
        onConfirm={(feature) => handleNanobotFeatureAction("enable", feature.name, true)}
      />

      <AutomationDeleteDialog
        job={automationPendingDelete}
        deleting={automationAction === `delete:${automationPendingDelete?.id ?? ""}`}
        onOpenChange={(open) => {
          if (!open) setAutomationPendingDelete(null);
        }}
        onConfirm={(job) => handleAutomationAction("delete", job)}
      />

      <AutomationEditDialog
        job={automationPendingEdit}
        saving={automationAction === `update:${automationPendingEdit?.id ?? ""}`}
        onOpenChange={(open) => {
          if (!open) setAutomationPendingEdit(null);
        }}
        onSave={handleAutomationEdit}
      />

      <main
        className={cn(
          "min-w-0 flex-1 bg-settings-canvas [scrollbar-gutter:stable]",
          activeSection === "channels" ? "overflow-y-auto xl:overflow-hidden" : "overflow-y-auto",
        )}
      >
        <div
          key={activeSection}
          data-testid="settings-section-transition"
          data-settings-section={activeSection}
          className={cn(
            "mx-auto w-full animate-in fade-in-0 slide-in-from-bottom-1 px-4 py-6 duration-200 ease-out",
            "motion-reduce:animate-none sm:px-8 sm:py-8 lg:py-12",
            activeSection === "channels" ? "max-w-[1240px] xl:px-10" : "max-w-[920px]",
            activeSection === "channels" && "flex min-h-full flex-col xl:h-full xl:min-h-0",
            hostChromeInset && "pt-[4.25rem] sm:pt-[4.25rem] lg:pt-[4.75rem]",
          )}
        >
          {!showSidebar ? (
            <div className="mb-7">
              <button
                type="button"
                onClick={onBackToChat}
                className="touch-target mb-4 inline-flex items-center gap-1.5 rounded-full px-2.5 py-1.5 text-[12px] font-medium text-muted-foreground transition-colors hover:bg-muted/70 hover:text-foreground lg:hidden"
              >
                <ChevronLeft className="h-3.5 w-3.5" aria-hidden />
                {t("settings.backToChat")}
              </button>
              <h1 className="text-[24px] font-normal leading-tight tracking-normal text-foreground sm:text-[28px]">
                {t(`settings.nav.${activeSection}`, {
                  defaultValue: standaloneSectionTitle(activeSection),
                })}
              </h1>
            </div>
          ) : null}

          {loading ? (
            <div className="flex h-48 items-center justify-center rounded-[22px] bg-settings-surface text-sm text-muted-foreground">
              <Loader2 className="mr-2 h-4 w-4 animate-spin" />
              {t("settings.status.loading")}
            </div>
          ) : error && !settings ? (
            <SettingsGroup>
              <SettingsRow title={t("settings.status.loadError")}>
                <span className="max-w-[520px] text-sm text-muted-foreground">{error}</span>
              </SettingsRow>
            </SettingsGroup>
          ) : settings ? (
            <div
              className={cn(
                "space-y-5",
                activeSection === "channels" &&
                  "flex min-h-0 flex-1 flex-col xl:overflow-hidden",
              )}
            >
              {error ? (
                <div className="rounded-[18px] border border-destructive/20 bg-destructive/5 px-4 py-3 text-[13px] text-destructive">
                  {error}
                </div>
              ) : null}
              {renderSection()}
            </div>
          ) : null}
        </div>
      </main>
    </div>
  );
}

const SETTINGS_NAV_ITEMS: Array<{ key: SettingsSectionKey; icon: LucideIcon; fallback: string }> = [
  { key: "overview", icon: Activity, fallback: "Overview" },
  { key: "appearance", icon: Palette, fallback: "Appearance" },
  { key: "models", icon: SlidersHorizontal, fallback: "Models" },
  { key: "image", icon: ImageIcon, fallback: "Image" },
  { key: "voice", icon: Mic, fallback: "Voice" },
  { key: "browser", icon: Globe2, fallback: "Web" },
  { key: "channels", icon: MessageCircle, fallback: "Channels" },
  { key: "runtime", icon: Server, fallback: "System" },
  { key: "advanced", icon: ShieldCheck, fallback: "Security" },
];

function visibleWebuiDefaultAccessMode(mode: string | null | undefined): WebuiDefaultAccessMode {
  return mode === "full" ? "full" : "default";
}

function standaloneSectionTitle(section: SettingsSectionKey): string {
  if (section === "apps") return "Apps";
  if (section === "automations") return "Automations";
  if (section === "skills") return "Skills";
  return SETTINGS_NAV_ITEMS.find((item) => item.key === section)?.fallback ?? "Settings";
}

function SettingsSidebar({
  activeSection,
  onSelectSection,
  onBackToChat,
  onLogout,
  hostChromeInset,
}: {
  activeSection: SettingsSectionKey;
  onSelectSection: (section: SettingsSectionKey) => void;
  onBackToChat: () => void;
  onLogout?: () => void;
  hostChromeInset?: boolean;
}) {
  const { t } = useTranslation();
  const activeNavItemRef = useRef<HTMLButtonElement>(null);
  const activeItem = SETTINGS_NAV_ITEMS.find((item) => item.key === activeSection)
    ?? SETTINGS_NAV_ITEMS[0];
  const ActiveIcon = activeItem.icon;
  const activeLabel = t(`settings.nav.${activeItem.key}`, {
    defaultValue: activeItem.fallback,
  });

  return (
    <aside
      className={cn(
        "flex w-full shrink-0 flex-col bg-settings-surface px-3 pb-2 lg:w-[17rem] lg:px-3 lg:pb-4",
        hostChromeInset ? "pt-[4.25rem] lg:pt-[4.25rem]" : "pt-4 lg:pt-4",
      )}
    >
      <button
        type="button"
        onClick={onBackToChat}
        className="touch-target mb-2 inline-flex w-fit items-center gap-1.5 rounded-full px-2.5 py-1.5 text-[12px] font-medium text-muted-foreground transition-colors hover:bg-muted/70 hover:text-foreground lg:mb-3"
      >
        <ChevronLeft className="h-3.5 w-3.5" aria-hidden />
        {t("settings.backToChat")}
      </button>
      <div className="mb-3 px-1 lg:mb-4 lg:px-2">
        <h2 className="text-[18px] font-normal tracking-normal text-foreground">
          {t("settings.sidebar.title")}
        </h2>
      </div>

      <nav
        aria-label={t("settings.sidebar.ariaLabel")}
        className="w-full"
      >
        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <button
              type="button"
              aria-label={`${t("settings.sidebar.title")}: ${activeLabel}`}
              className="touch-target flex h-11 w-full items-center gap-2.5 rounded-[14px] bg-sidebar-accent px-3 text-left text-[13px] font-medium text-foreground transition-colors hover:bg-sidebar-accent/80 lg:hidden"
            >
              <ActiveIcon className="h-4 w-4 shrink-0" strokeWidth={2} aria-hidden />
              <span className="min-w-0 flex-1 truncate">{activeLabel}</span>
              <ChevronDown className="h-4 w-4 shrink-0 text-muted-foreground" aria-hidden />
            </button>
          </DropdownMenuTrigger>
          <DropdownMenuContent
            align="start"
            sideOffset={6}
            className="w-[var(--radix-dropdown-menu-trigger-width)] max-w-[calc(100vw-1.5rem)] rounded-[16px] p-1.5"
          >
            {SETTINGS_NAV_ITEMS.map(({ key, icon: Icon, fallback }) => {
              const active = key === activeSection;
              return (
                <DropdownMenuItem
                  key={key}
                  aria-current={active ? "page" : undefined}
                  onSelect={() => onSelectSection(key)}
                  className={cn(
                    "flex h-10 cursor-default items-center gap-2.5 rounded-[11px] px-2.5 text-[13px] font-medium",
                    active && "bg-sidebar-accent text-foreground focus:bg-sidebar-accent",
                  )}
                >
                  <Icon className="h-4 w-4 shrink-0" strokeWidth={2} aria-hidden />
                  <span className="min-w-0 flex-1 truncate">
                    {t(`settings.nav.${key}`, { defaultValue: fallback })}
                  </span>
                  {active ? <Check className="h-4 w-4 shrink-0" aria-hidden /> : null}
                </DropdownMenuItem>
              );
            })}
          </DropdownMenuContent>
        </DropdownMenu>

        <SidebarSelectionHighlight
          targetRef={activeNavItemRef}
          activeId={activeSection}
          scope="settings"
          className="relative hidden space-y-1 lg:block"
        >
          {SETTINGS_NAV_ITEMS.map(({ key, icon: Icon, fallback }) => {
            const active = key === activeSection;
            return (
              <button
                ref={active ? activeNavItemRef : undefined}
                key={key}
                type="button"
                aria-current={active ? "page" : undefined}
                onClick={() => onSelectSection(key)}
                className={cn(
                  "touch-target flex h-9 w-full items-center gap-2 rounded-xl px-2.5 text-left text-[13px] font-medium",
                  SIDEBAR_SELECTION_ITEM_CLASS,
                  active
                    ? "text-sidebar-accent-foreground"
                    : "text-muted-foreground/78 hover:bg-muted/45 hover:text-foreground",
                )}
              >
                <Icon className="h-4 w-4 shrink-0" strokeWidth={2} aria-hidden />
                <span className="truncate">
                  {t(`settings.nav.${key}`, { defaultValue: fallback })}
                </span>
              </button>
            );
          })}
        </SidebarSelectionHighlight>
      </nav>

      <div className="hidden lg:mt-auto lg:block lg:pt-4">
        {onLogout && !hostChromeInset ? (
          <Button
            type="button"
            variant="ghost"
            onClick={onLogout}
            className="h-9 w-full justify-start gap-2 rounded-[10px] px-2.5 text-[13px] font-medium text-muted-foreground hover:bg-destructive/8 hover:text-destructive"
          >
            <LogOut className="h-4 w-4" aria-hidden />
            {t("app.account.logout")}
          </Button>
        ) : null}
      </div>
    </aside>
  );
}

function OverviewSettings({
  settings,
  requiresRestart,
  onSelectSection,
  showBrandLogos,
}: {
  settings: SettingsPayload;
  requiresRestart: boolean;
  onSelectSection: (section: SettingsSectionKey) => void;
  showBrandLogos: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const activePresetName = settings.agent.model_preset;
  const activePreset =
    activePresetName && activePresetName !== "default"
      ? settings.model_presets.find((preset) => preset.name === activePresetName)?.label ??
        activePresetName
      : null;
  const activeProvider = settings.agent.resolved_provider ?? settings.agent.provider;
  const activeProviderConfigured = settingsProviderConfigured(settings, activeProvider);
  const activeProviderLabel = providerDisplayLabel(settings.providers, activeProvider);
  const activeModelValue = activeProviderConfigured
    ? settings.agent.model
    : tx("settings.values.notConfigured", "Not configured");
  const activeModelCaption = activeProviderConfigured
    ? [activeProvider, activePreset].filter(Boolean).join(" · ")
    : activeProviderLabel || settings.agent.model
      ? [activeProviderLabel, settings.agent.model].filter(Boolean).join(" · ")
      : tx("settings.byok.noConfiguredProviders", "No configured providers");
  const webStatus = settings.web.enable
    ? tx("settings.values.enabled", "Enabled")
    : tx("settings.values.disabled", "Disabled");
  const webSearchProvider =
    settings.web_search.providers.find((provider) => provider.name === settings.web_search.provider) ??
    settings.web_search.providers[0];
  const webSearchProviderLabel = providerDisplayLabel(
    settings.web_search.providers,
    settings.web_search.provider,
  );
  const webSearchCredentialStatus =
    webSearchProvider?.credential === "none"
      ? tx("settings.byok.webSearch.noCredentialRequired", "No key required")
      : webSearchProvider?.credential === "optional_api_key"
        ? settings.web_search.api_key_hint
          ? tx("settings.values.configured", "Configured")
          : tx("settings.byok.webSearch.noCredentialRequired", "No key required")
      : webSearchProvider?.credential === "base_url"
        ? settings.web_search.base_url
          ? tx("settings.values.configured", "Configured")
          : tx("settings.values.notConfigured", "Not configured")
        : settings.web_search.api_key_hint
          ? tx("settings.values.configured", "Configured")
          : tx("settings.values.notConfigured", "Not configured");
  const webCaption = `${webSearchProviderLabel} · ${webSearchCredentialStatus}`;
  const imageStatus = settings.image_generation.enabled
    ? tx("settings.values.enabled", "Enabled")
    : tx("settings.values.disabled", "Disabled");
  const imageCaption = `${providerDisplayLabel(settings.image_generation.providers, settings.image_generation.provider)} · ${
    settings.image_generation.provider_configured
      ? tx("settings.values.configured", "Configured")
      : tx("settings.values.notConfigured", "Not configured")
  }`;
  const transcription = settings.transcription ?? DEFAULT_TRANSCRIPTION_SETTINGS;
  const voiceStatus = transcription.enabled
    ? tx("settings.values.enabled", "Enabled")
    : tx("settings.values.disabled", "Disabled");
  const voiceCaption = `${providerDisplayLabel(transcription.providers, transcription.provider)} · ${
    transcription.provider_configured
      ? tx("settings.values.configured", "Configured")
      : tx("settings.values.notConfigured", "Not configured")
  }`;
  const isNativeHost = (settings.surface ?? settings.runtime_surface) === "native";
  const workspaceCaption = shortWorkspacePath(settings.runtime.workspace_path);
  const runtimeTitle = isNativeHost
    ? tx("settings.rows.engine", "Engine")
    : tx("settings.rows.gateway", "Gateway");
  const runtimeValue = isNativeHost
    ? tx("settings.values.privateEngine", "Private engine")
    : `${settings.runtime.gateway_host}:${settings.runtime.gateway_port}`;
  const runtimeCaption = isNativeHost
    ? tx("settings.values.unixSocket", "Unix socket")
    : requiresRestart
      ? tx("settings.values.restartPending", "Restart pending")
      : tx("settings.values.ready", "Ready");
  return (
    <div className="space-y-7">
      <section className="rounded-[22px] bg-settings-surface px-4 py-4 sm:px-5">
        <TokenUsageHeatmap usage={settings.usage} timeZone={settings.agent.timezone} />
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.sections.ai", "AI")}</SettingsSectionTitle>
        <SettingsGroup>
          <OverviewListRow
            icon={Bot}
            valueLogoProvider={activeProvider}
            title={tx("settings.overview.model", "Current model")}
            value={activeModelValue}
            caption={activeModelCaption}
            showBrandLogos={showBrandLogos}
            onClick={() => onSelectSection("models")}
          />
        </SettingsGroup>
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.sections.capabilities", "Capabilities")}</SettingsSectionTitle>
        <SettingsGroup>
          <OverviewListRow
            icon={Globe2}
            valueLogoProvider={settings.web_search.provider}
            title={tx("settings.overview.webSearch", "Web search")}
            value={webStatus}
            caption={webCaption}
            showBrandLogos={showBrandLogos}
            onClick={() => onSelectSection("browser")}
          />
          <OverviewListRow
            icon={ImageIcon}
            valueLogoProvider={settings.image_generation.provider}
            title={tx("settings.overview.imageGeneration", "Image generation")}
            value={imageStatus}
            caption={imageCaption}
            showBrandLogos={showBrandLogos}
            onClick={() => onSelectSection("image")}
          />
          <OverviewListRow
            icon={Mic}
            valueLogoProvider={transcription.provider}
            title={tx("settings.overview.voiceInput", "Voice input")}
            value={voiceStatus}
            caption={voiceCaption}
            showBrandLogos={showBrandLogos}
            onClick={() => onSelectSection("voice")}
          />
        </SettingsGroup>
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.sections.system", "System")}</SettingsSectionTitle>
        <SettingsGroup>
          <OverviewListRow
            icon={Server}
            title={runtimeTitle}
            value={runtimeValue}
            caption={runtimeCaption}
            onClick={() => onSelectSection("runtime")}
          />
          <OverviewListRow
            icon={HardDrive}
            title={tx("settings.overview.workspace", "Workspace")}
            value={tx("settings.values.defaultWorkspace", "Default workspace")}
            caption={workspaceCaption}
            onClick={() => onSelectSection("runtime")}
          />
        </SettingsGroup>
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.sections.about", "About")}</SettingsSectionTitle>
        <SettingsGroup>
          <VersionCheckRow currentVersion={settings.version?.current} />
        </SettingsGroup>
      </section>
    </div>
  );
}

function VersionCheckRow({ currentVersion }: { currentVersion?: string }) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const { token } = useClient();
  const [checking, setChecking] = useState(false);
  const [result, setResult] = useState<
    | { type: "up-to-date" }
    | { type: "update"; latestVersion: string; pypiUrl?: string }
    | { type: "error"; message: string }
    | null
  >(null);

  const handleCheck = async () => {
    setChecking(true);
    setResult(null);
    try {
      const res = await checkVersion(token);
      if (res.updateAvailable) {
        setResult({
          type: "update",
          latestVersion: res.updateAvailable.latestVersion,
          pypiUrl: res.updateAvailable.pypiUrl,
        });
      } else {
        setResult({ type: "up-to-date" });
      }
    } catch (err) {
      setResult({ type: "error", message: (err as Error).message });
    } finally {
      setChecking(false);
    }
  };

  return (
    <div className="flex min-h-[62px] flex-col gap-3 px-4 py-3.5 sm:flex-row sm:items-center sm:justify-between sm:px-5">
      <div className="min-w-0">
        <div className="text-[14px] font-medium leading-5 text-foreground">
          {tx("settings.about.version", "Version")}
        </div>
        <div className="mt-0.5 text-[12px] leading-5 text-muted-foreground">
          {currentVersion ? `v${currentVersion}` : "nanobot"}
        </div>
      </div>
      <div className="flex shrink-0 flex-col items-end gap-2">
        <Button
          size="sm"
          variant="outline"
          onClick={() => void handleCheck()}
          disabled={checking}
          className="rounded-full"
        >
          {checking ? (
            <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
          ) : (
            <ArrowUpCircle className="mr-1.5 h-3.5 w-3.5" aria-hidden />
          )}
          {checking
            ? tx("settings.about.checking", "Checking...")
            : tx("settings.about.checkForUpdates", "Check for updates")}
        </Button>
        {result?.type === "up-to-date" ? (
          <span className="inline-flex items-center gap-1.5 text-[12px] text-emerald-600 dark:text-emerald-300">
            <Check className="h-3 w-3" aria-hidden />
            {tx("settings.about.upToDate", "You're up to date")}
          </span>
        ) : null}
        {result?.type === "update" ? (
          <span className="inline-flex items-center gap-1.5 text-[12px] text-blue-600 dark:text-blue-300">
            <ArrowUpCircle className="h-3 w-3" aria-hidden />
            {t("settings.about.updateAvailable", {
              defaultValue: "Update available v{{version}}",
              version: result.latestVersion,
            })}
            {result.pypiUrl ? (
              <a
                href={result.pypiUrl}
                target="_blank"
                rel="noopener noreferrer"
                className="inline-flex items-center gap-0.5 underline-offset-2 hover:underline"
              >
                PyPI
                <ExternalLink className="h-2.5 w-2.5" aria-hidden />
              </a>
            ) : null}
          </span>
        ) : null}
        {result?.type === "error" ? (
          <span className="text-[12px] text-destructive">{result.message}</span>
        ) : null}
      </div>
    </div>
  );
}

function AppearanceSettings({
  theme,
  onToggleTheme,
  localPrefs,
  onChangeLocalPrefs,
}: {
  theme: "light" | "dark";
  onToggleTheme: () => void;
  localPrefs: LocalPreferences;
  onChangeLocalPrefs: Dispatch<SetStateAction<LocalPreferences>>;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  return (
    <div className="space-y-7">
      <section>
        <SettingsSectionTitle>{t("settings.sections.interface")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={t("settings.rows.theme")}
            description={t("settings.help.theme")}
          >
            <button
              type="button"
              onClick={onToggleTheme}
              className="inline-flex h-8 items-center rounded-full bg-muted p-0.5 text-[12px] font-medium text-muted-foreground"
            >
              <span
                className={cn(
                  "rounded-full px-3 py-1 transition-colors",
                  theme === "light" &&
                    "bg-background text-foreground ring-1 ring-inset ring-border/45",
                )}
              >
                {t("settings.values.light")}
              </span>
              <span
                className={cn(
                  "rounded-full px-3 py-1 transition-colors",
                  theme === "dark" &&
                    "bg-background text-foreground ring-1 ring-inset ring-border/45",
                )}
              >
                {t("settings.values.dark")}
              </span>
            </button>
          </SettingsRow>

          <SettingsRow
            title={t("settings.rows.language")}
            description={t("settings.help.language")}
          >
            <LanguageSwitcher />
          </SettingsRow>
        </SettingsGroup>
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.sections.localPreferences", "Local preferences")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={tx("settings.rows.density", "Density")}
            description={tx("settings.help.density", "Stored only in this browser.")}
          >
            <SegmentedControl
              value={localPrefs.density}
              options={[
                { value: "comfortable", label: tx("settings.values.comfortable", "Comfortable") },
                { value: "compact", label: tx("settings.values.compact", "Compact") },
              ]}
              onChange={(density) =>
                onChangeLocalPrefs((prev) => ({ ...prev, density: density as LocalDensity }))
              }
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.activityMode", "Activity detail")}
            description={tx("settings.help.activityMode", "Choose how much agent activity chrome to show by default.")}
          >
            <SegmentedControl
              value={localPrefs.activityMode}
              options={[
                { value: "auto", label: tx("settings.values.auto", "Auto") },
                { value: "expanded", label: tx("settings.values.expanded", "Expanded") },
              ]}
              onChange={(activityMode) =>
                onChangeLocalPrefs((prev) => ({ ...prev, activityMode: activityMode as LocalActivityMode }))
              }
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.fileEditDisplay", "File edit display")}
            description={tx("settings.help.fileEditDisplay", "Choose whether file edit activity opens as line counts or a diff.")}
          >
            <SegmentedControl
              value={localPrefs.fileEditDisplayMode}
              options={[
                { value: "summary", label: tx("settings.values.summary", "Summary") },
                { value: "diff", label: tx("settings.values.diff", "Diff") },
                { value: "collapsed_diff", label: tx("settings.values.collapsedDiff", "Collapsed diff") },
              ]}
              onChange={(fileEditDisplayMode) =>
                onChangeLocalPrefs((prev) => ({
                  ...prev,
                  fileEditDisplayMode: fileEditDisplayMode as FileEditDisplayMode,
                }))
              }
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.codeWrap", "Code wrapping")}
            description={tx("settings.help.codeWrap", "Keep long code lines readable on smaller screens.")}
          >
            <ToggleButton
              checked={localPrefs.codeWrap}
              onChange={(codeWrap) => onChangeLocalPrefs((prev) => ({ ...prev, codeWrap }))}
              ariaLabel={tx("settings.rows.codeWrap", "Code wrapping")}
              label={localPrefs.codeWrap ? tx("settings.values.on", "On") : tx("settings.values.off", "Off")}
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.brandLogos", "Brand logos")}
            description={tx("settings.help.brandLogos", "Show third-party provider and CLI logos in Settings.")}
          >
            <ToggleButton
              checked={localPrefs.brandLogos}
              onChange={(brandLogos) => onChangeLocalPrefs((prev) => ({ ...prev, brandLogos }))}
              ariaLabel={tx("settings.rows.brandLogos", "Brand logos")}
              label={localPrefs.brandLogos ? tx("settings.values.on", "On") : tx("settings.values.off", "Off")}
            />
          </SettingsRow>
        </SettingsGroup>
      </section>
    </div>
  );
}

function ProviderOAuthLoginDialog({
  flow,
  providerLabel,
  authorizationResponse,
  completing,
  error,
  remoteBrowserAccess,
  onAuthorizationResponseChange,
  onOpenAuthorization,
  onComplete,
  onClose,
}: {
  flow: ProviderOAuthAuthorizationRequired | null;
  providerLabel: string;
  authorizationResponse: string;
  completing: boolean;
  error: string | null;
  remoteBrowserAccess: boolean;
  onAuthorizationResponseChange: (value: string) => void;
  onOpenAuthorization: () => void;
  onComplete: () => void;
  onClose: () => void;
}) {
  const { t } = useTranslation();
  const expectsCallbackUrl = flow?.completion_input === "callback_url";
  const inputId = expectsCallbackUrl ? "provider-oauth-callback" : "provider-oauth-code";
  const inputLabel = expectsCallbackUrl
    ? t("settings.oauth.callbackUrl")
    : t("settings.oauth.authorizationCode");

  return (
    <Dialog
      open={Boolean(flow)}
      onOpenChange={(open) => {
        if (!open) onClose();
      }}
    >
      <DialogContent className="w-[min(calc(100vw-2rem),28rem)] rounded-[24px]">
        <form
          className="space-y-4"
          onSubmit={(event) => {
            event.preventDefault();
            onComplete();
          }}
        >
          <DialogHeader>
            <DialogTitle>{providerLabel}</DialogTitle>
            <DialogDescription>
              {expectsCallbackUrl
                ? remoteBrowserAccess
                  ? t("settings.oauth.remoteCallbackHelp")
                  : t("settings.oauth.localCallbackHelp")
                : remoteBrowserAccess
                  ? t("settings.oauth.remoteCodeHelp")
                  : t("settings.oauth.localCodeHelp")}
            </DialogDescription>
          </DialogHeader>
          <div className="flex items-center gap-2 rounded-[14px] border border-border/45 bg-muted/35 px-3 py-2.5 text-[12px] text-muted-foreground">
            {expectsCallbackUrl && remoteBrowserAccess ? (
              <Clipboard className="h-3.5 w-3.5 shrink-0" aria-hidden />
            ) : (
              <Loader2 className="h-3.5 w-3.5 shrink-0 animate-spin" aria-hidden />
            )}
            <span>
              {expectsCallbackUrl && remoteBrowserAccess
                ? t("settings.oauth.pasteCallbackToContinue")
                : t("settings.oauth.waitingForCallback")}
            </span>
          </div>
          <div className="space-y-2">
            <label
              htmlFor={inputId}
              className="block text-xs font-medium text-foreground"
            >
              {inputLabel}
            </label>
            {expectsCallbackUrl ? (
              <Textarea
                id={inputId}
                value={authorizationResponse}
                onChange={(event) => onAuthorizationResponseChange(event.target.value)}
                placeholder={t("settings.oauth.callbackUrlPlaceholder")}
                aria-label={inputLabel}
                autoComplete="off"
                spellCheck={false}
                className="min-h-[88px] resize-none break-all font-mono text-[12px] leading-5"
              />
            ) : (
              <Input
                id={inputId}
                value={authorizationResponse}
                onChange={(event) => onAuthorizationResponseChange(event.target.value)}
                placeholder={inputLabel}
                aria-label={inputLabel}
                autoComplete="off"
                spellCheck={false}
              />
            )}
          </div>
          {error ? (
            <p
              role="alert"
              className="rounded-[14px] border border-destructive/20 bg-destructive/5 px-3 py-2.5 text-[12px] text-destructive"
            >
              {error}
            </p>
          ) : null}
          <DialogFooter className="gap-2 sm:space-x-0">
            <Button type="button" variant="outline" onClick={onOpenAuthorization}>
              <ExternalLink className="mr-2 h-4 w-4" aria-hidden />
              {expectsCallbackUrl
                ? t("settings.oauth.openChatGPT")
                : t("settings.oauth.signIn")}
            </Button>
            <Button type="submit" disabled={!authorizationResponse.trim() || completing}>
              {completing ? t("settings.oauth.signingIn") : t("settings.oauth.finishSignIn")}
            </Button>
          </DialogFooter>
        </form>
      </DialogContent>
    </Dialog>
  );
}

function ModelPresetDeleteDialog({
  preset,
  deleting,
  onOpenChange,
  onConfirm,
}: {
  preset: SettingsPayload["model_presets"][number] | null;
  deleting: boolean;
  onOpenChange: (open: boolean) => void;
  onConfirm: () => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  return (
    <Dialog open={preset !== null} onOpenChange={onOpenChange}>
      <DialogContent className="max-w-[440px] rounded-[24px]">
        <DialogHeader className="text-left">
          <DialogTitle>
            {tx("settings.models.deletePresetTitle", "Delete model preset?")}
          </DialogTitle>
          <DialogDescription className="leading-5">
            {tx(
              "settings.models.deletePresetHelp",
              "This removes the preset “{{name}}”. Provider credentials are not affected.",
              { name: preset?.label ?? "" },
            )}
          </DialogDescription>
        </DialogHeader>
        <DialogFooter className="gap-2 sm:space-x-0">
          <Button
            type="button"
            variant="ghost"
            className="rounded-full"
            disabled={deleting}
            onClick={() => onOpenChange(false)}
          >
            {tx("settings.actions.cancel", "Cancel")}
          </Button>
          <Button
            type="button"
            variant="destructive"
            className="rounded-full"
            disabled={deleting}
            onClick={onConfirm}
          >
            {deleting ? (
              <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
            ) : null}
            {deleting
              ? tx("settings.actions.deleting", "Deleting...")
              : tx("settings.actions.delete", "Delete")}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}

function CapabilityInstallNotice({
  title,
  description,
  installing = false,
}: {
  title: string;
  description: string;
  installing?: boolean;
}) {
  return (
    <div className="flex items-start gap-3 rounded-[14px] border border-border/55 bg-muted/22 px-3.5 py-3">
      {installing ? (
        <Loader2 className="mt-0.5 h-4 w-4 shrink-0 animate-spin text-muted-foreground" aria-hidden />
      ) : (
        <CircleAlert className="mt-0.5 h-4 w-4 shrink-0 text-muted-foreground" aria-hidden />
      )}
      <div className="min-w-0">
        <p className="text-[12.5px] font-medium text-foreground">{title}</p>
        <p className="mt-0.5 text-[12px] leading-5 text-muted-foreground">{description}</p>
      </div>
    </div>
  );
}

function ModelsSettings({
  token,
  form,
  setForm,
  settings,
  dirty,
  creating,
  creatingSaving,
  callOrder,
  saving,
  orderSaving,
  migrationSaving,
  showBrandLogos,
  providerSaving,
  onChangeCallOrder,
  onProviderOAuthLogin,
  onSave,
  onMigrate,
  onBeginCreate,
  onCancelCreate,
  onSelectConfiguration,
  onDeleteConfiguration,
}: {
  token: string;
  form: AgentSettingsDraft;
  setForm: Dispatch<SetStateAction<AgentSettingsDraft>>;
  settings: SettingsPayload;
  dirty: boolean;
  creating: boolean;
  creatingSaving: boolean;
  callOrder: string[];
  saving: boolean;
  orderSaving: boolean;
  migrationSaving: boolean;
  showBrandLogos: boolean;
  providerSaving: string | null;
  onChangeCallOrder: (order: string[]) => void;
  onProviderOAuthLogin: (provider: string) => void;
  onSave: () => void;
  onMigrate: () => void;
  onBeginCreate: () => void;
  onCancelCreate: () => void;
  onSelectConfiguration: () => void;
  onDeleteConfiguration: (preset: SettingsPayload["model_presets"][number]) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  const [editorOpen, setEditorOpen] = useState(false);
  const [advancedOpen, setAdvancedOpen] = useState(false);
  const [draggedCallOrderIndex, setDraggedCallOrderIndex] = useState<number | null>(null);
  const [dragOverCallOrderIndex, setDragOverCallOrderIndex] = useState<number | null>(null);
  const namedPresets = settings.model_presets.filter((preset) => !preset.is_default);
  const namedPresetsByName = new Map(namedPresets.map((preset) => [preset.name, preset]));
  const unorderedPresets = namedPresets.filter((preset) => !callOrder.includes(preset.name));
  const callOrderOccurrences = new Map<string, number>();
  const presetRows = [
    ...callOrder.map((name, orderIndex) => {
      const occurrence = callOrderOccurrences.get(name) ?? 0;
      callOrderOccurrences.set(name, occurrence + 1);
      return {
        key: `ordered:${name}:${occurrence}`,
        name,
        orderIndex,
        preset: namedPresetsByName.get(name),
      };
    }),
    ...unorderedPresets.map((preset) => ({
      key: `disabled:${preset.name}`,
      name: preset.name,
      orderIndex: -1,
      preset,
    })),
  ];
  const selectedPreset = namedPresetsByName.get(form.modelPreset) ?? null;
  useEffect(() => {
    setAdvancedOpen(false);
  }, [editorOpen, selectedPreset?.name]);

  const configuredProviders = settings.providers.filter((provider) => provider.configured);
  const selectedProvider = settings.providers.find((provider) => provider.name === form.provider);
  const selectableProviders = uniqueProviders([
    ...configuredProviders,
    ...(selectedProvider ? [selectedProvider] : []),
  ]);
  const showAutoProvider = selectedPreset?.provider === "auto" || form.provider === "auto";
  const providerOptions = showAutoProvider
    ? [{ name: "auto", label: tx("settings.values.auto", "Auto") }, ...selectableProviders]
    : selectableProviders;
  const providerValue = providerOptions.some((provider) => provider.name === form.provider)
    ? form.provider
    : "";
  const selectedProviderNeedsSignIn =
    selectedProvider?.auth_type === "oauth" && !selectedProvider.configured;
  const selectedProviderSigningIn = providerSaving === selectedProvider?.name;
  const selectedProviderConfigured = settingsProviderConfigured(
    settings,
    form.provider,
    selectedPreset?.resolved_provider,
  );
  const modelFieldsMissing =
    !form.model.trim() ||
    !form.provider.trim() ||
    !form.presetLabel.trim() ||
    form.maxTokens <= 0 ||
    form.temperature < 0 ||
    form.temperature > 2;
  const selectedPresetReferenced = Boolean(
    selectedPreset && (settings.model_call_order ?? []).includes(selectedPreset.name),
  );
  const callOrderBusy = orderSaving || saving;
  const selectPreset = (preset: SettingsPayload["model_presets"][number]) => {
    const toggleCurrentPreset = !creating && selectedPreset?.name === preset.name;
    onSelectConfiguration();
    if (toggleCurrentPreset) {
      setEditorOpen((open) => !open);
      return;
    }
    setForm((prev) => ({
      ...prev,
      modelPreset: preset.name,
      model: preset.model,
      provider: preset.provider,
      presetLabel: preset.label,
      maxTokens: preset.max_tokens,
      contextWindowTokens: normalizeContextWindowTokens(preset.context_window_tokens),
      temperature: preset.temperature,
      reasoningEffort: preset.reasoning_effort ?? "",
    }));
    setEditorOpen(true);
  };

  const moveCallOrderItem = (index: number, offset: -1 | 1) => {
    if (callOrderBusy) return;
    const nextIndex = index + offset;
    if (nextIndex < 0 || nextIndex >= callOrder.length) return;
    const next = [...callOrder];
    [next[index], next[nextIndex]] = [next[nextIndex], next[index]];
    onChangeCallOrder(next);
  };

  const removeCallOrderItem = (index: number) => {
    if (callOrderBusy || callOrder.length <= 1) return;
    onChangeCallOrder(callOrder.filter((_, itemIndex) => itemIndex !== index));
  };

  const dropCallOrderItem = (targetIndex: number) => {
    if (
      callOrderBusy ||
      draggedCallOrderIndex === null ||
      draggedCallOrderIndex === targetIndex
    ) {
      setDraggedCallOrderIndex(null);
      setDragOverCallOrderIndex(null);
      return;
    }
    const next = [...callOrder];
    const moved = next.splice(draggedCallOrderIndex, 1)[0];
    if (!moved) {
      setDraggedCallOrderIndex(null);
      setDragOverCallOrderIndex(null);
      return;
    }
    next.splice(targetIndex, 0, moved);
    setDraggedCallOrderIndex(null);
    setDragOverCallOrderIndex(null);
    onChangeCallOrder(next);
  };

  return (
    <div className="space-y-7">
      <section>
        <SettingsSectionTitle>
          {tx("settings.models.presets", "Model presets")}
        </SettingsSectionTitle>
        <SettingsGroup>
          {!settings.model_call_order_editable ? (
            <div className="flex flex-col gap-4 px-4 py-4 sm:flex-row sm:items-center sm:justify-between sm:px-5">
              <div className="flex min-w-0 items-start gap-3">
                <span className="grid h-9 w-9 shrink-0 place-items-center rounded-[12px] bg-muted text-muted-foreground">
                  <ListOrdered className="h-4 w-4" aria-hidden />
                </span>
                <div className="min-w-0">
                  <p className="text-[14px] font-medium text-foreground">
                    {tx("settings.models.convertTitle", "Convert the current model setup")}
                  </p>
                  <p className="mt-0.5 max-w-[34rem] text-[12px] leading-5 text-muted-foreground">
                    {tx(
                      "settings.models.convertHelp",
                      "Turn the existing primary and fallback models into presets so their order can be managed here.",
                    )}
                  </p>
                </div>
              </div>
              <Button
                size="sm"
                variant="outline"
                className="shrink-0 rounded-full"
                disabled={migrationSaving}
                onClick={onMigrate}
              >
                {migrationSaving ? (
                  <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
                ) : null}
                {migrationSaving
                  ? tx("settings.models.converting", "Converting...")
                  : tx("settings.models.convertAction", "Convert to presets")}
              </Button>
            </div>
          ) : (
            <>
              <div role="list" className="divide-y divide-border/45">
                {presetRows.map(({ key, name, orderIndex, preset }) => {
                  const ordered = orderIndex >= 0;
                  const provider = preset
                    ? modelPresetProviderKey(preset, settings)
                    : settings.agent.resolved_provider ?? settings.agent.provider;
                  const presetConfigured = preset
                    ? settingsProviderConfigured(
                        settings,
                        preset.provider,
                        preset.resolved_provider,
                      )
                    : true;
                  const isDropTarget =
                    ordered &&
                    dragOverCallOrderIndex === orderIndex &&
                    draggedCallOrderIndex !== orderIndex;
                  const dropAfterTarget =
                    isDropTarget &&
                    draggedCallOrderIndex !== null &&
                    draggedCallOrderIndex < orderIndex;
                  return (
                    <div
                      key={key}
                      role="listitem"
                      tabIndex={ordered ? 0 : -1}
                      draggable={ordered && !callOrderBusy}
                      aria-label={
                        ordered
                          ? `${preset?.label ?? name}. ${tx(
                              "settings.models.dragToReorder",
                              "Drag to reorder",
                            )}`
                          : preset?.label ?? name
                      }
                      data-testid={`model-call-order-row-${name}`}
                      onDragStart={(event) => {
                        if (!ordered || callOrderBusy) {
                          event.preventDefault();
                          return;
                        }
                        event.dataTransfer.effectAllowed = "move";
                        event.dataTransfer.setData("text/plain", name);
                        setDraggedCallOrderIndex(orderIndex);
                        setDragOverCallOrderIndex(orderIndex);
                      }}
                      onDragEnd={() => {
                        setDraggedCallOrderIndex(null);
                        setDragOverCallOrderIndex(null);
                      }}
                      onDragEnter={(event) => {
                        if (ordered && draggedCallOrderIndex !== null) {
                          event.preventDefault();
                          setDragOverCallOrderIndex(orderIndex);
                        }
                      }}
                      onDragOver={(event) => {
                        if (!ordered || draggedCallOrderIndex === null) return;
                        event.preventDefault();
                        event.dataTransfer.dropEffect = "move";
                      }}
                      onDrop={(event) => {
                        if (!ordered) return;
                        event.preventDefault();
                        dropCallOrderItem(orderIndex);
                      }}
                      onKeyDown={(event) => {
                        if (event.currentTarget !== event.target) return;
                        if (ordered && event.key === "ArrowUp") {
                          event.preventDefault();
                          moveCallOrderItem(orderIndex, -1);
                        } else if (ordered && event.key === "ArrowDown") {
                          event.preventDefault();
                          moveCallOrderItem(orderIndex, 1);
                        } else if ((event.key === "Enter" || event.key === " ") && preset) {
                          event.preventDefault();
                          selectPreset(preset);
                        }
                      }}
                      className={cn(
                        "group relative flex min-h-[76px] select-none items-center gap-3 px-4 py-3 outline-none transition-[background-color,opacity] duration-150 sm:px-5",
                        ordered &&
                          (callOrderBusy
                            ? "cursor-wait"
                            : "cursor-grab active:cursor-grabbing"),
                        "hover:bg-muted/25",
                        isDropTarget &&
                          !dropAfterTarget &&
                          "before:absolute before:inset-x-4 before:top-0 before:z-10 before:h-0.5 before:rounded-full before:bg-foreground sm:before:inset-x-5",
                        isDropTarget &&
                          dropAfterTarget &&
                          "after:absolute after:inset-x-4 after:bottom-0 after:z-10 after:h-0.5 after:rounded-full after:bg-foreground sm:after:inset-x-5",
                        ordered && draggedCallOrderIndex === orderIndex && "opacity-35",
                        "focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-ring",
                      )}
                    >
                      {ordered ? (
                        <GripVertical
                          className="pointer-events-none h-4 w-4 shrink-0 text-muted-foreground/40 transition-colors group-hover:text-muted-foreground"
                          aria-hidden
                        />
                      ) : (
                        <span className="h-4 w-4 shrink-0" aria-hidden />
                      )}
                      <button
                        type="button"
                        aria-pressed={selectedPreset?.name === name}
                        aria-expanded={selectedPreset?.name === name && editorOpen}
                        disabled={!preset}
                        onClick={() => preset && selectPreset(preset)}
                        className="flex min-w-0 flex-1 items-center gap-3 rounded-[12px] text-left outline-none focus-visible:ring-2 focus-visible:ring-ring"
                      >
                        {ordered ? (
                          <span className="grid h-7 w-7 shrink-0 place-items-center rounded-full bg-muted font-mono text-[11px] font-semibold tabular-nums text-muted-foreground">
                            {orderIndex + 1}
                          </span>
                        ) : (
                          <span className="h-7 w-7 shrink-0" aria-hidden />
                        )}
                        <ProviderPickerIcon
                          provider={provider}
                          showBrandLogos={showBrandLogos}
                          unconfigured={!presetConfigured}
                        />
                        <span className="min-w-0 flex-1">
                          <span className="flex min-w-0 flex-wrap items-center gap-2">
                            <span className="truncate text-[14px] font-medium text-foreground">
                              {preset?.label ?? name}
                            </span>
                            {orderIndex === 0 ? (
                              <StatusPill tone="success">
                                {tx("settings.models.primary", "Primary")}
                              </StatusPill>
                            ) : !ordered ? (
                              <StatusPill tone="neutral">
                                {tx("settings.models.disabled", "Disabled")}
                              </StatusPill>
                            ) : null}
                            {!presetConfigured ? (
                              <span className="text-[11px] font-medium text-amber-700 dark:text-amber-300">
                                {tx(
                                  "settings.models.providerSetupRequired",
                                  "Provider setup required",
                                )}
                              </span>
                            ) : null}
                          </span>
                          <span className="mt-0.5 block truncate text-[12px] text-muted-foreground">
                            {preset?.model ?? name}
                          </span>
                        </span>
                        <ChevronRight
                          className={cn(
                            "h-4 w-4 shrink-0 text-muted-foreground transition-transform",
                            selectedPreset?.name === name && editorOpen && "rotate-90",
                          )}
                          aria-hidden
                        />
                      </button>
                      <button
                        type="button"
                        role="switch"
                        aria-checked={ordered}
                        aria-label={
                          ordered
                            ? tx("settings.models.removeFromOrder", "Disable preset")
                            : tx("settings.models.addToOrder", "Enable preset")
                        }
                        disabled={callOrderBusy || (ordered && callOrder.length <= 1)}
                        onClick={() => {
                          if (ordered) {
                            removeCallOrderItem(orderIndex);
                          } else if (preset) {
                            onChangeCallOrder([...callOrder, preset.name]);
                          }
                        }}
                        className={cn(
                          "relative inline-flex h-5 w-9 shrink-0 items-center rounded-full transition-colors outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-40",
                          ordered ? "bg-foreground" : "bg-muted-foreground/25",
                        )}
                      >
                        <span
                          className={cn(
                            "h-4 w-4 rounded-full bg-background shadow-sm transition-transform",
                            ordered ? "translate-x-[18px]" : "translate-x-0.5",
                          )}
                          aria-hidden
                        />
                      </button>
                    </div>
                  );
                })}
              </div>
              <div className="flex min-h-[58px] flex-col gap-3 px-4 py-3 sm:flex-row sm:items-center sm:justify-between sm:px-5">
                {!creating ? (
                  <Button
                    size="sm"
                    variant="ghost"
                    className="rounded-full"
                    disabled={callOrderBusy}
                    onClick={() => {
                      setEditorOpen(true);
                      onBeginCreate();
                    }}
                  >
                    <Plus className="mr-1.5 h-3.5 w-3.5" aria-hidden />
                    {tx("settings.models.newPreset", "New model preset")}
                  </Button>
                ) : (
                  <span />
                )}
                {orderSaving ? (
                  <SettingsStatusMessage>
                    <span className="inline-flex items-center gap-1.5">
                      <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden />
                      {tx("settings.actions.saving", "Saving...")}
                    </span>
                  </SettingsStatusMessage>
                ) : null}
              </div>
            </>
          )}

      {editorOpen && (selectedPreset || creating) ? (
        <>
            <div className="flex min-h-[52px] items-center justify-between gap-3 bg-muted/15 px-4 py-3 sm:px-5">
              <span className="text-[13px] font-semibold text-foreground/85">
                {creating
                  ? tx("settings.models.newPreset", "New model preset")
                  : tx("settings.models.editPreset", "Edit preset")}
              </span>
            </div>
            <SettingsRow title={tx("settings.models.presetName", "Preset name")}>
              <Input
                autoFocus={creating}
                value={form.presetLabel}
                placeholder={tx("settings.models.presetNamePlaceholder", "Fast writing")}
                onChange={(event) =>
                  setForm((prev) => ({ ...prev, presetLabel: event.target.value }))
                }
                className="h-8 w-[min(280px,70vw)] rounded-full text-[13px]"
              />
            </SettingsRow>
            <SettingsRow title={t("settings.rows.provider")}>
              <ProviderPicker
                providers={providerOptions}
                value={providerValue}
                emptyLabel={t("settings.byok.noConfiguredProviders")}
                showProviderLogos={showBrandLogos}
                onChange={(provider) =>
                  setForm((prev) => ({
                    ...prev,
                    provider,
                    model: provider === prev.provider ? prev.model : "",
                  }))
                }
              />
            </SettingsRow>
            {selectedProviderNeedsSignIn ? (
              <SettingsRow
                title={tx("settings.oauth.signInRequired", "Sign in required")}
                description={tx(
                  "settings.oauth.signInBeforeSaving",
                  "Sign in before saving this provider in the preset.",
                )}
              >
                <Button
                  size="sm"
                  variant="outline"
                  onClick={() => selectedProvider && onProviderOAuthLogin(selectedProvider.name)}
                  disabled={!selectedProvider?.oauth_login_supported || selectedProviderSigningIn}
                  className="rounded-full"
                >
                  {selectedProviderSigningIn ? (
                    <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
                  ) : null}
                  {selectedProviderSigningIn
                    ? tx("settings.oauth.signingIn", "Signing in...")
                    : tx("settings.oauth.signIn", "Sign in")}
                </Button>
              </SettingsRow>
            ) : null}
            <SettingsRow title={t("settings.rows.model")}>
              <ModelIdPicker
                token={token}
                settings={settings}
                provider={form.provider}
                value={form.model}
                showProviderLogos={showBrandLogos}
                onChange={(model) => setForm((prev) => ({ ...prev, model }))}
              />
            </SettingsRow>
            <button
              type="button"
              aria-expanded={advancedOpen}
              onClick={() => setAdvancedOpen((value) => !value)}
              className="flex min-h-[62px] w-full items-center justify-between gap-4 px-4 py-3.5 text-left transition-colors hover:bg-muted/30 sm:px-5"
            >
              <span>
                <span className="block text-[14px] font-medium text-foreground">
                  {tx("settings.models.advancedOptions", "Advanced options")}
                </span>
                <span className="mt-0.5 block text-[12px] text-muted-foreground">
                  {tx(
                    "settings.models.advancedSummary",
                    "Context {{context}} · Max {{max}} tokens",
                    {
                      context: formatModelContextWindow(form.contextWindowTokens),
                      max: formatContextWindow(form.maxTokens),
                    },
                  )}
                </span>
              </span>
              <ChevronDown
                className={cn(
                  "h-4 w-4 shrink-0 text-muted-foreground transition-transform",
                  advancedOpen && "rotate-180",
                )}
                aria-hidden
              />
            </button>
            {advancedOpen ? (
              <div className="bg-muted/12 px-4 py-4 sm:px-5">
                <ModelAdvancedFields
                  maxTokens={form.maxTokens}
                  contextWindowTokens={form.contextWindowTokens}
                  temperature={form.temperature}
                  reasoningEffort={form.reasoningEffort}
                  onChange={(value) => setForm((prev) => ({ ...prev, ...value }))}
                />
              </div>
            ) : null}
            <div className="flex min-h-[58px] flex-col gap-3 px-4 py-3 sm:flex-row sm:items-center sm:justify-between sm:px-5">
              {creating ? (
                <Button
                  size="sm"
                  variant="ghost"
                  className="self-start rounded-full text-muted-foreground"
                  disabled={creatingSaving}
                  onClick={() => {
                    setEditorOpen(false);
                    onCancelCreate();
                  }}
                >
                  {tx("settings.actions.cancel", "Cancel")}
                </Button>
              ) : selectedPreset ? (
                <Button
                  size="sm"
                  variant="ghost"
                  className="self-start rounded-full text-muted-foreground hover:text-destructive"
                  disabled={selectedPresetReferenced || saving || orderSaving}
                  title={
                    selectedPresetReferenced
                      ? tx(
                          "settings.models.removeBeforeDelete",
                          "Remove this preset from the call order before deleting it.",
                        )
                      : undefined
                  }
                  onClick={() => onDeleteConfiguration(selectedPreset)}
                >
                  <Trash2 className="mr-1.5 h-3.5 w-3.5" aria-hidden />
                  {tx("settings.actions.delete", "Delete")}
                </Button>
              ) : null}
              <div className="flex items-center justify-end gap-3">
                <Button
                  size="sm"
                  variant="outline"
                  className="rounded-full"
                  disabled={
                    (!creating && !dirty) ||
                    !selectedProviderConfigured ||
                    modelFieldsMissing ||
                    saving ||
                    orderSaving
                  }
                  onClick={onSave}
                >
                  {saving || creatingSaving
                    ? tx("settings.actions.saving", "Saving...")
                    : tx("settings.actions.savePreset", "Save preset")}
                </Button>
              </div>
            </div>
          </>
      ) : null}
        </SettingsGroup>
      </section>
    </div>
  );
}

function ModelAdvancedFields({
  maxTokens,
  contextWindowTokens,
  temperature,
  reasoningEffort,
  onChange,
}: {
  maxTokens: number;
  contextWindowTokens: number;
  temperature: number;
  reasoningEffort: string;
  onChange: (
    value: Partial<
      Pick<
        AgentSettingsDraft,
        "maxTokens" | "contextWindowTokens" | "temperature" | "reasoningEffort"
      >
    >,
  ) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const contextWindowOptions = Array.from(
    new Set([...CONTEXT_WINDOW_TOKEN_OPTIONS, contextWindowTokens]),
  ).sort((left, right) => left - right);
  return (
    <div className="space-y-4">
      <div className="grid gap-4 sm:grid-cols-2">
        <label className="block">
          <span className="mb-1.5 block text-[12px] font-medium text-muted-foreground">
            {tx("settings.models.maxTokens", "Max output tokens")}
          </span>
          <Input
            type="number"
            min={1}
            step={1}
            value={maxTokens}
            onChange={(event) => {
              const value = Number(event.target.value);
              if (Number.isFinite(value)) onChange({ maxTokens: value });
            }}
            className="h-9 rounded-[12px] text-[13px]"
          />
        </label>
        <label className="block">
          <span className="mb-1.5 block text-[12px] font-medium text-muted-foreground">
            {tx("settings.models.temperature", "Temperature")}
          </span>
          <Input
            type="number"
            min={0}
            max={2}
            step={0.1}
            value={temperature}
            onChange={(event) => {
              const value = Number(event.target.value);
              if (Number.isFinite(value)) onChange({ temperature: value });
            }}
            className="h-9 rounded-[12px] text-[13px]"
          />
        </label>
      </div>
      <div>
        <span className="mb-2 block text-[12px] font-medium text-muted-foreground">
          {tx("settings.rows.contextWindow", "Context window")}
        </span>
        <SegmentedControl
          value={String(contextWindowTokens)}
          options={contextWindowOptions.map((tokens) => ({
            value: String(tokens),
            label: formatModelContextWindow(tokens),
          }))}
          onChange={(value) =>
            onChange({ contextWindowTokens: normalizeContextWindowTokens(Number(value)) })
          }
        />
      </div>
      <label className="block">
        <span className="mb-1.5 block text-[12px] font-medium text-muted-foreground">
          {tx("settings.models.reasoningEffort", "Reasoning effort")}
        </span>
        <Input
          value={reasoningEffort}
          onChange={(event) => onChange({ reasoningEffort: event.target.value })}
          placeholder={tx("settings.values.default", "Default")}
          autoCapitalize="none"
          spellCheck={false}
          className="h-9 rounded-[12px] text-[13px]"
        />
      </label>
    </div>
  );
}

function ProviderAdvancedOptions({
  fields,
  form,
  onChange,
  footer,
}: {
  fields: ProviderAdvancedField[];
  form: ProviderForm;
  onChange: (value: Partial<ProviderForm>) => void;
  footer?: ReactNode;
}) {
  const { t } = useTranslation();
  const [open, setOpen] = useState(false);
  const enabled = new Set(fields);
  if (enabled.size === 0) return null;

  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const thinkingStyleOptions = [
    { value: "", label: tx("settings.values.default", "Default") },
    { value: "thinking_type", label: "thinking_type" },
    { value: "enable_thinking", label: "enable_thinking" },
    { value: "reasoning_split", label: "reasoning_split" },
  ];

  return (
    <div className="border-y border-border/45">
      <button
        type="button"
        aria-expanded={open}
        onClick={() => setOpen((value) => !value)}
        className="flex min-h-[48px] w-full items-center justify-between gap-4 px-1 py-2.5 text-left transition-colors hover:text-foreground"
      >
        <span className="text-[13px] font-medium text-foreground">
          {tx("settings.providers.advancedOptions", "Advanced options")}
        </span>
        <ChevronDown
          className={cn(
            "h-4 w-4 shrink-0 text-muted-foreground transition-transform",
            open && "rotate-180",
          )}
          aria-hidden
        />
      </button>
      {open ? (
        <div className="border-t border-border/45 py-3">
          <div className="grid gap-3 md:grid-cols-2">
            {enabled.has("api_type") ? (
              <label className="block space-y-1.5">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.apiType", "API type")}
                </span>
                <DropdownMenu>
                  <DropdownMenuTrigger asChild>
                    <Button
                      type="button"
                      variant="outline"
                      className="h-9 w-full justify-between rounded-full px-3 text-[13px]"
                    >
                      <span>
                        {OPENAI_API_TYPE_OPTIONS.find(
                          (option) => option.value === form.apiType,
                        )?.label ?? form.apiType}
                      </span>
                      <ChevronDown
                        className="h-3.5 w-3.5 text-muted-foreground"
                        aria-hidden
                      />
                    </Button>
                  </DropdownMenuTrigger>
                  <DropdownMenuContent align="start" className="min-w-[220px]">
                    {OPENAI_API_TYPE_OPTIONS.map((option) => (
                      <DropdownMenuItem
                        key={option.value}
                        onSelect={() => onChange({ apiType: option.value })}
                      >
                        {option.label}
                      </DropdownMenuItem>
                    ))}
                  </DropdownMenuContent>
                </DropdownMenu>
              </label>
            ) : null}
            {enabled.has("thinking_style") ? (
              <label className="block space-y-1.5">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.thinkingStyle", "Thinking style")}
                </span>
                <DropdownMenu>
                  <DropdownMenuTrigger asChild>
                    <Button
                      type="button"
                      variant="outline"
                      className="h-9 w-full justify-between rounded-full px-3 text-[13px]"
                    >
                      <span className="font-mono text-[12px]">
                        {thinkingStyleOptions.find(
                          (option) => option.value === form.thinkingStyle,
                        )?.label ?? form.thinkingStyle}
                      </span>
                      <ChevronDown
                        className="h-3.5 w-3.5 text-muted-foreground"
                        aria-hidden
                      />
                    </Button>
                  </DropdownMenuTrigger>
                  <DropdownMenuContent align="start" className="min-w-[220px]">
                    {thinkingStyleOptions.map((option) => (
                      <DropdownMenuItem
                        key={option.value || "default"}
                        onSelect={() => onChange({ thinkingStyle: option.value })}
                        className="font-mono text-[12px]"
                      >
                        {option.label}
                      </DropdownMenuItem>
                    ))}
                  </DropdownMenuContent>
                </DropdownMenu>
              </label>
            ) : null}
            {enabled.has("proxy") ? (
              <label className="block space-y-1.5 md:col-span-2">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.proxy", "Network proxy")}
                </span>
                <Input
                  value={form.proxy}
                  onChange={(event) => onChange({ proxy: event.target.value })}
                  placeholder="http://127.0.0.1:7890"
                  autoCapitalize="none"
                  autoComplete="off"
                  autoCorrect="off"
                  spellCheck={false}
                  className="h-9 rounded-full font-mono text-[12px]"
                />
              </label>
            ) : null}
            {enabled.has("region") ? (
              <label className="block space-y-1.5">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.region", "Region")}
                </span>
                <Input
                  value={form.region}
                  onChange={(event) => onChange({ region: event.target.value })}
                  placeholder="us-east-1"
                  autoCapitalize="none"
                  autoComplete="off"
                  autoCorrect="off"
                  spellCheck={false}
                  className="h-9 rounded-full font-mono text-[12px]"
                />
              </label>
            ) : null}
            {enabled.has("profile") ? (
              <label className="block space-y-1.5">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.profile", "Profile")}
                </span>
                <Input
                  value={form.profile}
                  onChange={(event) => onChange({ profile: event.target.value })}
                  placeholder="default"
                  autoCapitalize="none"
                  autoComplete="off"
                  autoCorrect="off"
                  spellCheck={false}
                  className="h-9 rounded-full font-mono text-[12px]"
                />
              </label>
            ) : null}
            {enabled.has("extra_headers") ? (
              <label className="block min-w-0 space-y-1.5">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.extraHeaders", "Extra headers")}
                </span>
                <Textarea
                  value={form.extraHeaders}
                  onChange={(event) => onChange({ extraHeaders: event.target.value })}
                  placeholder={'{"X-Header":"value"}'}
                  spellCheck={false}
                  className="min-h-[88px] resize-y rounded-[14px] bg-background font-mono text-[12px]"
                />
              </label>
            ) : null}
            {enabled.has("extra_query") ? (
              <label className="block min-w-0 space-y-1.5">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.extraQuery", "Extra query")}
                </span>
                <Textarea
                  value={form.extraQuery}
                  onChange={(event) => onChange({ extraQuery: event.target.value })}
                  placeholder={'{"api-version":"2024-02-01"}'}
                  spellCheck={false}
                  className="min-h-[88px] resize-y rounded-[14px] bg-background font-mono text-[12px]"
                />
              </label>
            ) : null}
            {enabled.has("extra_body") ? (
              <label className="block min-w-0 space-y-1.5 md:col-span-2">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.providers.extraBody", "Extra body")}
                </span>
                <Textarea
                  value={form.extraBody}
                  onChange={(event) => onChange({ extraBody: event.target.value })}
                  placeholder={'{"service_tier":"priority"}'}
                  spellCheck={false}
                  className="min-h-[96px] resize-y rounded-[14px] bg-background font-mono text-[12px]"
                />
              </label>
            ) : null}
          </div>
          {footer ? (
            <div className="mt-3 flex items-center justify-end gap-2 border-t border-border/45 pt-3">
              {footer}
            </div>
          ) : null}
        </div>
      ) : null}
    </div>
  );
}

function ProvidersSettings({
  settings,
  nanobotFeatures,
  featureAction,
  capabilityError,
  expandedProvider,
  providerForms,
  visibleProviderKeys,
  editingProviderKeys,
  providerSaving,
  showBrandLogos,
  remoteBrowserAccess,
  onToggleProvider,
  onToggleProviderKey,
  onToggleProviderKeyEditing,
  onChangeProviderForm,
  onSaveProvider,
  onCreateCustomProvider,
  onProviderOAuthLogin,
  onProviderOAuthLogout,
  imageProviderRestartPending,
  onRestart,
  isRestarting,
}: {
  settings: SettingsPayload;
  nanobotFeatures: NanobotFeaturesPayload | null;
  featureAction: string | null;
  capabilityError: string | null;
  expandedProvider: string | null;
  providerForms: Record<string, ProviderForm>;
  visibleProviderKeys: Record<string, boolean>;
  editingProviderKeys: Record<string, boolean>;
  providerSaving: string | null;
  showBrandLogos: boolean;
  remoteBrowserAccess: boolean;
  onToggleProvider: (provider: string) => void;
  onToggleProviderKey: (provider: string) => void;
  onToggleProviderKeyEditing: (provider: string) => void;
  onChangeProviderForm: (provider: string, value: Partial<ProviderForm>) => void;
  onSaveProvider: (provider: string) => void;
  onCreateCustomProvider: (draft: CustomProviderDraft) => Promise<boolean>;
  onProviderOAuthLogin: (provider: string) => void;
  onProviderOAuthLogout: (provider: string) => void;
  imageProviderRestartPending: boolean;
  onRestart?: () => void;
  isRestarting?: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const [creatingCustomProvider, setCreatingCustomProvider] = useState(false);
  const [customProviderKeyVisible, setCustomProviderKeyVisible] = useState(false);
  const [customProviderDraft, setCustomProviderDraft] = useState<CustomProviderDraft>(
    emptyCustomProviderDraft,
  );
  const configuredProviders = settings.providers.filter((provider) => provider.configured);
  const unconfiguredProviders = useMemo(
    () =>
      orderUnconfiguredProviders(
        settings.providers.filter(
          (provider) => !provider.configured && provider.name !== "custom",
        ),
      ),
    [settings.providers],
  );
  const selectedUnconfiguredProvider =
    unconfiguredProviders.find((provider) => provider.name === expandedProvider) ?? null;
  const customProviderSaving = providerSaving === CUSTOM_PROVIDER_CREATION_KEY;
  const toggleProvider = (providerName: string) => {
    setCreatingCustomProvider(false);
    onToggleProvider(providerName);
  };
  const beginCustomProviderCreation = () => {
    if (expandedProvider) onToggleProvider(expandedProvider);
    setCustomProviderDraft(emptyCustomProviderDraft());
    setCustomProviderKeyVisible(false);
    setCreatingCustomProvider(true);
  };
  const cancelCustomProviderCreation = () => {
    setCreatingCustomProvider(false);
    setCustomProviderDraft(emptyCustomProviderDraft());
    setCustomProviderKeyVisible(false);
  };
  const saveCustomProvider = async () => {
    if (customProviderSaving) return;
    if (await onCreateCustomProvider(customProviderDraft)) {
      cancelCustomProviderCreation();
    }
  };
  const renderProviderRow = (provider: SettingsPayload["providers"][number]) => {
    const expanded = expandedProvider === provider.name;
    const form = providerForms[provider.name] ?? providerFormFromRow(provider);
    const saving = providerSaving === provider.name;
    const isOauthProvider = provider.auth_type === "oauth";
    const supportsOauthAdvancedSettings =
      isOauthProvider && OAUTH_PROXY_PROVIDERS.has(provider.name);
    const keyVisible = !!visibleProviderKeys[provider.name];
    const editingKey = !provider.configured || !!editingProviderKeys[provider.name];
    const apiKeyRequired = provider.api_key_required ?? true;
    const apiKey = form.apiKey.trim();
    const apiBase = form.apiBase.trim();
    const advancedFields = provider.advanced_fields ?? [];
    const oauthSettingsDirty = isOauthProvider && (
      form.proxy.trim() !== (provider.proxy ?? "").trim()
      || form.extraBody.trim() !== providerJsonValue(provider.extra_body).trim()
    );
    const oauthSettingsSaving = saving && oauthSettingsDirty;
    const oauthActionBusy = saving && !oauthSettingsSaving;
    const missingRequiredApiKey = !isOauthProvider && apiKeyRequired && !provider.configured && !apiKey;
    const hasOptionalProviderSetting = Boolean(
      apiKey
      || apiBase
      || form.proxy.trim()
      || form.extraHeaders.trim()
      || form.extraBody.trim()
      || form.extraQuery.trim()
      || form.thinkingStyle.trim()
      || form.region.trim()
      || form.profile.trim(),
    );
    const missingOptionalCredential =
      !isOauthProvider
      && !apiKeyRequired
      && !provider.configured
      && !hasOptionalProviderSetting;
    const supportName = provider.name === "bedrock"
      ? "bedrock"
      : provider.name === "azure_openai"
        ? "azure"
        : null;
    const supportFeature = supportName
      ? (nanobotFeatures?.features ?? []).find((feature) => feature.name === supportName)
      : null;
    return (
      <div key={provider.name} className="divide-y divide-border/45">
        <button
          type="button"
          aria-expanded={expanded}
          onClick={() => toggleProvider(provider.name)}
          className="flex min-h-[70px] w-full items-center justify-between gap-4 px-4 py-3 text-left transition-colors hover:bg-muted/35 sm:px-5"
        >
          <span className="flex min-w-0 items-center gap-3">
            <ProviderIcon
              provider={provider.name}
              showBrandLogos={showBrandLogos}
            />
            <span className="min-w-0">
              <span className="block truncate text-[15px] font-semibold leading-5 text-foreground">
                {provider.label}
              </span>
              {provider.api_base ? (
                <span className="block truncate text-[12px] text-muted-foreground">
                  {provider.api_base}
                </span>
              ) : null}
            </span>
          </span>
          <ChevronDown
            className={cn(
              "h-4 w-4 shrink-0 text-muted-foreground transition-transform",
              expanded && "rotate-180",
            )}
            aria-hidden
          />
        </button>

        {expanded ? (
          <div className="space-y-3 bg-muted/18 px-4 py-4 sm:px-5">
            {supportFeature && !supportFeature.installed ? (
              <CapabilityInstallNotice
                title={tx("settings.capabilities.providerSupport", "Provider support")}
                description={tx(
                  "settings.capabilities.providerInstallOnSave",
                  "Required support will be installed automatically when you save this provider.",
                )}
                installing={featureAction === `enable:${supportName}`}
              />
            ) : null}
            {supportName && capabilityError ? (
              <p className="text-[12px] text-destructive">{capabilityError}</p>
            ) : null}
            {isOauthProvider ? (
              <>
                <div className="flex flex-col gap-3 rounded-[18px] border border-border/45 bg-background/75 px-4 py-3 sm:flex-row sm:items-center sm:justify-between">
                  <div className="min-w-0">
                    <p className="text-[13px] font-semibold text-foreground">
                      {tx("settings.oauth.authentication", "OAuth authentication")}
                    </p>
                    <p className="mt-1 text-[12px] text-muted-foreground">
                      {provider.configured
                        ? t("settings.oauth.signedInAs", {
                            account: provider.oauth_account || provider.label,
                            defaultValue: "Signed in as {{account}}",
                          })
                        : provider.name === "openai_codex" && remoteBrowserAccess
                          ? tx(
                              "settings.oauth.codexRemoteSignInHelp",
                              "Sign in through this browser, then paste the full localhost callback URL back into nanobot.",
                            )
                          : provider.name === "xai_grok" && remoteBrowserAccess
                          ? tx(
                              "settings.oauth.remoteSignInHelp",
                              "Select Sign in to open xAI on your computer, then paste the authorization code shown after login.",
                            )
                          : tx("settings.oauth.signInHelp", "Sign in from this device; no API key is stored in config.")}
                    </p>
                  </div>
                  <div className="flex shrink-0 justify-end gap-2">
                    {provider.configured ? (
                      <Button
                        size="sm"
                        variant="ghost"
                        onClick={() => onProviderOAuthLogout(provider.name)}
                        disabled={saving}
                        className="rounded-full"
                      >
                        {tx("settings.oauth.signOut", "Sign out")}
                      </Button>
                    ) : null}
                    <Button
                      size="sm"
                      variant="outline"
                      onClick={() => onProviderOAuthLogin(provider.name)}
                      disabled={saving || oauthSettingsDirty || !provider.oauth_login_supported}
                      title={
                        oauthSettingsDirty
                          ? tx(
                              "settings.providers.saveAdvancedBeforeSignIn",
                              "Save advanced changes before signing in.",
                            )
                          : undefined
                      }
                      className="rounded-full"
                    >
                      {oauthActionBusy ? (
                        <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
                      ) : null}
                      {oauthActionBusy
                        ? tx("settings.oauth.signingIn", "Signing in...")
                        : provider.configured
                          ? tx("settings.oauth.signInAgain", "Sign in again")
                          : tx("settings.oauth.signIn", "Sign in")}
                    </Button>
                  </div>
                </div>
                {supportsOauthAdvancedSettings ? (
                  <ProviderAdvancedOptions
                    fields={advancedFields}
                    form={form}
                    onChange={(value) => onChangeProviderForm(provider.name, value)}
                    footer={
                      <>
                        <Button
                          size="sm"
                          variant="ghost"
                          onClick={() => toggleProvider(provider.name)}
                          disabled={saving}
                          className="rounded-full"
                        >
                          {t("settings.actions.cancel")}
                        </Button>
                        <Button
                          size="sm"
                          variant="outline"
                          onClick={() => onSaveProvider(provider.name)}
                          disabled={saving || !oauthSettingsDirty}
                          className="rounded-full"
                        >
                          {oauthSettingsSaving ? (
                            <Loader2
                              className="mr-1.5 h-3.5 w-3.5 animate-spin"
                              aria-hidden
                            />
                          ) : null}
                          {oauthSettingsSaving
                            ? t("settings.actions.saving")
                            : tx("settings.providers.saveProvider", "Save provider")}
                        </Button>
                      </>
                    }
                  />
                ) : null}
              </>
            ) : (
              <>
                {provider.is_custom ? (
                  <label className="block space-y-1.5">
                    <span className="text-[12px] font-medium text-muted-foreground">
                      {tx("settings.providers.customProviderName", "Provider name")}
                    </span>
                    <Input
                      value={form.displayName}
                      onChange={(event) =>
                        onChangeProviderForm(provider.name, { displayName: event.target.value })
                      }
                      className="h-9 rounded-full text-[13px]"
                    />
                  </label>
                ) : null}
                <label className="block space-y-1.5">
                  <span className="text-[12px] font-medium text-muted-foreground">
                    {t("settings.byok.apiKey")}
                  </span>
                  <div className="relative">
                    {editingKey ? (
                      <>
                        <Input
                          type={keyVisible ? "text" : "password"}
                          value={form.apiKey}
                          onChange={(event) =>
                            onChangeProviderForm(provider.name, { apiKey: event.target.value })
                          }
                          placeholder={
                            provider.configured
                              ? t("settings.byok.apiKeyConfiguredPlaceholder")
                              : t("settings.byok.apiKeyPlaceholder")
                          }
                          className="h-9 rounded-full pr-11 text-[13px]"
                        />
                        <Button
                          type="button"
                          variant="ghost"
                          size="icon"
                          onClick={() => onToggleProviderKey(provider.name)}
                          aria-label={
                            keyVisible
                              ? t("settings.byok.hideApiKey")
                              : t("settings.byok.showApiKey")
                          }
                          className="absolute right-1 top-1/2 h-7 w-7 -translate-y-1/2 rounded-full text-muted-foreground hover:bg-muted hover:text-foreground"
                        >
                          {keyVisible ? (
                            <EyeOff className="h-3.5 w-3.5" aria-hidden />
                          ) : (
                            <Eye className="h-3.5 w-3.5" aria-hidden />
                          )}
                        </Button>
                      </>
                    ) : (
                      <>
                        <div className="flex h-9 items-center rounded-full border border-input bg-background px-3 pr-11 text-[13px] text-muted-foreground">
                          {provider.api_key_hint ?? t("settings.byok.configuredKeyHint")}
                        </div>
                        <Button
                          type="button"
                          variant="ghost"
                          size="icon"
                          onClick={() => onToggleProviderKeyEditing(provider.name)}
                          aria-label={t("settings.actions.edit")}
                          className="absolute right-1 top-1/2 h-7 w-7 -translate-y-1/2 rounded-full text-muted-foreground hover:bg-muted hover:text-foreground"
                        >
                          <Pencil className="h-3.5 w-3.5" aria-hidden />
                        </Button>
                      </>
                    )}
                  </div>
                </label>
                <label className="block space-y-1.5">
                  <span className="text-[12px] font-medium text-muted-foreground">
                    {t("settings.byok.apiBase")}
                  </span>
                  <Input
                    value={form.apiBase}
                    onChange={(event) =>
                      onChangeProviderForm(provider.name, { apiBase: event.target.value })
                    }
                    placeholder={provider.default_api_base ?? t("settings.byok.apiBasePlaceholder")}
                    className="h-9 rounded-full text-[13px]"
                  />
                </label>
                <ProviderAdvancedOptions
                  fields={advancedFields}
                  form={form}
                  onChange={(value) => onChangeProviderForm(provider.name, value)}
                />
                <div className="flex items-center justify-end gap-2">
                  <Button
                    size="sm"
                    variant="ghost"
                    onClick={() => toggleProvider(provider.name)}
                    className="rounded-full"
                  >
                    {t("settings.actions.cancel")}
                  </Button>
                  <Button
                    size="sm"
                    variant="outline"
                    onClick={() => onSaveProvider(provider.name)}
                    disabled={
                      saving
                      || missingRequiredApiKey
                      || missingOptionalCredential
                      || (provider.is_custom && !form.displayName.trim())
                    }
                    className="rounded-full"
                  >
                    {saving
                      ? t("settings.actions.saving")
                      : tx("settings.providers.saveProvider", "Save provider")}
                  </Button>
                </div>
              </>
            )}
          </div>
        ) : null}
      </div>
    );
  };
  const customProviderForm = creatingCustomProvider ? (
    <div className="divide-y divide-border/45">
      <button
        type="button"
        aria-expanded
        onClick={cancelCustomProviderCreation}
        className="flex min-h-[70px] w-full items-center justify-between gap-4 px-4 py-3 text-left transition-colors hover:bg-muted/35 sm:px-5"
      >
        <span className="flex min-w-0 items-center gap-3">
          <ProviderIcon provider="custom" showBrandLogos={showBrandLogos} />
          <span className="truncate text-[15px] font-semibold text-foreground">
            {tx("settings.providers.customProvider", "Custom provider")}
          </span>
        </span>
        <ChevronDown
          className="h-4 w-4 shrink-0 rotate-180 text-muted-foreground"
          aria-hidden
        />
      </button>
      <div className="space-y-3 bg-muted/18 px-4 py-4 sm:px-5">
        <label className="block space-y-1.5">
          <span className="text-[12px] font-medium text-muted-foreground">
            {tx("settings.providers.customProviderName", "Provider name")}
          </span>
          <Input
            autoFocus
            value={customProviderDraft.name}
            onChange={(event) =>
              setCustomProviderDraft((current) => ({
                ...current,
                name: event.target.value,
              }))
            }
            placeholder={tx(
              "settings.providers.customProviderNamePlaceholder",
              "My model provider",
            )}
            className="h-9 rounded-full text-[13px]"
          />
        </label>
        <label className="block space-y-1.5">
          <span className="text-[12px] font-medium text-muted-foreground">
            {t("settings.byok.apiBase")}
          </span>
          <Input
            value={customProviderDraft.apiBase}
            onChange={(event) =>
              setCustomProviderDraft((current) => ({
                ...current,
                apiBase: event.target.value,
              }))
            }
            placeholder="https://api.example.com/v1"
            autoCapitalize="none"
            autoComplete="off"
            autoCorrect="off"
            spellCheck={false}
            className="h-9 rounded-full text-[13px]"
          />
        </label>
        <label className="block space-y-1.5">
          <span className="text-[12px] font-medium text-muted-foreground">
            {t("settings.byok.apiKey")}
          </span>
          <div className="relative">
            <Input
              type={customProviderKeyVisible ? "text" : "password"}
              value={customProviderDraft.apiKey}
              onChange={(event) =>
                setCustomProviderDraft((current) => ({
                  ...current,
                  apiKey: event.target.value,
                }))
              }
              placeholder={t("settings.byok.apiKeyPlaceholder")}
              autoCapitalize="none"
              autoComplete="off"
              autoCorrect="off"
              spellCheck={false}
              className="h-9 rounded-full pr-11 text-[13px]"
            />
            <Button
              type="button"
              variant="ghost"
              size="icon"
              onClick={() => setCustomProviderKeyVisible((visible) => !visible)}
              aria-label={
                customProviderKeyVisible
                  ? t("settings.byok.hideApiKey")
                  : t("settings.byok.showApiKey")
              }
              className="absolute right-1 top-1/2 h-7 w-7 -translate-y-1/2 rounded-full text-muted-foreground hover:bg-muted hover:text-foreground"
            >
              {customProviderKeyVisible ? (
                <EyeOff className="h-3.5 w-3.5" aria-hidden />
              ) : (
                <Eye className="h-3.5 w-3.5" aria-hidden />
              )}
            </Button>
          </div>
        </label>
        <ProviderAdvancedOptions
          fields={CUSTOM_PROVIDER_ADVANCED_FIELDS}
          form={customProviderDraft}
          onChange={(value) =>
            setCustomProviderDraft((current) => ({ ...current, ...value }))
          }
        />
        <div className="flex items-center justify-end gap-2">
          <Button
            size="sm"
            variant="ghost"
            onClick={cancelCustomProviderCreation}
            disabled={customProviderSaving}
            className="rounded-full"
          >
            {t("settings.actions.cancel")}
          </Button>
          <Button
            size="sm"
            variant="outline"
            onClick={saveCustomProvider}
            disabled={
              customProviderSaving ||
              !customProviderDraft.name.trim() ||
              !customProviderDraft.apiBase.trim()
            }
            className="rounded-full"
          >
            {customProviderSaving
              ? t("settings.actions.saving")
              : tx("settings.providers.saveProvider", "Save provider")}
          </Button>
        </div>
      </div>
    </div>
  ) : null;
  return (
    <div className="space-y-6">
      {imageProviderRestartPending && onRestart ? (
        <div className="flex min-h-[48px] items-center justify-between gap-3 border-y border-border/55 py-3">
          <p className="text-[13px] leading-5 text-muted-foreground">
            {tx("settings.status.imageProviderRestart", "Provider support changed. Restart when ready.")}
          </p>
          <div className="shrink-0">
            <Button
              size="sm"
              variant="ghost"
              onClick={onRestart}
              disabled={isRestarting}
              className="rounded-full"
            >
              {isRestarting ? (
                <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
              ) : (
                <RotateCcw className="mr-1.5 h-3.5 w-3.5" aria-hidden />
              )}
              {isRestarting ? t("app.system.restarting") : t("app.system.restart")}
            </Button>
          </div>
        </div>
      ) : null}
      <section>
        <SettingsSectionTitle>
          {tx("settings.providers.title", "Model providers")}
        </SettingsSectionTitle>
        <SettingsGroup>
          {configuredProviders.map(renderProviderRow)}
          {selectedUnconfiguredProvider
            ? renderProviderRow(selectedUnconfiguredProvider)
            : null}
          {customProviderForm}
          {!expandedProvider && !creatingCustomProvider ? (
            <DropdownMenu modal={false}>
              <DropdownMenuTrigger asChild>
                <button
                  type="button"
                  className="group flex min-h-[70px] w-full items-center justify-between gap-4 px-4 py-3 text-left transition-colors hover:bg-muted/35 sm:px-5"
                >
                  <span className="flex min-w-0 items-center gap-3">
                    <span className="grid h-10 w-10 shrink-0 place-items-center rounded-[14px] bg-muted text-muted-foreground">
                      <Plus className="h-5 w-5" aria-hidden />
                    </span>
                    <span className="truncate text-[15px] font-semibold text-foreground">
                      {tx(
                        "settings.providers.addOwnProvider",
                        "Add your own model provider",
                      )}
                    </span>
                  </span>
                  <ChevronDown
                    className="h-4 w-4 shrink-0 text-muted-foreground transition-transform group-data-[state=open]:rotate-180"
                    aria-hidden
                  />
                </button>
              </DropdownMenuTrigger>
              <DropdownMenuContent
                align="end"
                sideOffset={8}
                className="max-h-[24rem] w-[380px] max-w-[calc(100vw-2rem)] overflow-y-auto rounded-[20px] border-border bg-popover p-1.5 shadow-none scrollbar-thin scrollbar-track-transparent"
              >
                <DropdownMenuItem
                  onSelect={beginCustomProviderCreation}
                  className="flex min-h-[54px] cursor-default items-center gap-3 rounded-[14px] px-2.5 py-2 focus:bg-muted/85 focus:text-foreground"
                >
                  <ProviderIcon provider="custom" showBrandLogos={showBrandLogos} />
                  <span className="truncate text-[13px] font-medium">
                    {tx("settings.providers.customProvider", "Custom provider")}
                  </span>
                </DropdownMenuItem>
                {unconfiguredProviders.length > 0 ? <DropdownMenuSeparator /> : null}
                {unconfiguredProviders.map((provider) => (
                  <DropdownMenuItem
                    key={provider.name}
                    onSelect={() => {
                      setCreatingCustomProvider(false);
                      if (expandedProvider !== provider.name) {
                        onToggleProvider(provider.name);
                      }
                    }}
                    className="flex min-h-[54px] cursor-default items-center gap-3 rounded-[14px] px-2.5 py-2 focus:bg-muted/85 focus:text-foreground"
                  >
                    <ProviderIcon
                      provider={provider.name}
                      showBrandLogos={showBrandLogos}
                    />
                    <span className="truncate text-[13px] font-medium">
                      {provider.label}
                    </span>
                  </DropdownMenuItem>
                ))}
              </DropdownMenuContent>
            </DropdownMenu>
          ) : null}
        </SettingsGroup>
      </section>
    </div>
  );
}

function ImageGenerationSettings({
  token,
  settings,
  form,
  dirty,
  saving,
  onChangeForm,
  onSave,
  onOpenProviders,
  showBrandLogos,
  onRestart,
  isRestarting,
  requiresRestartPending,
}: {
  token: string;
  settings: SettingsPayload;
  form: ImageGenerationSettingsUpdate;
  dirty: boolean;
  saving: boolean;
  onChangeForm: Dispatch<SetStateAction<ImageGenerationSettingsUpdate>>;
  onSave: () => void;
  onOpenProviders: () => void;
  showBrandLogos: boolean;
  onRestart?: () => void;
  isRestarting?: boolean;
  requiresRestartPending: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const selectedProvider =
    settings.image_generation.providers.find((provider) => provider.name === form.provider) ??
    settings.image_generation.providers[0];
  const providerConfigured = !!selectedProvider?.configured;
  const missingCredential = form.enabled && !providerConfigured;
  const aspectOptions = optionRowsWithCurrent(
    IMAGE_ASPECT_RATIO_OPTIONS.map((value) => ({ name: value, label: value })),
    form.defaultAspectRatio,
  );
  const sizeOptions = optionRowsWithCurrent(
    IMAGE_SIZE_OPTIONS.map((value) => ({ name: value, label: value })),
    form.defaultImageSize,
  );
  const selectProvider = (provider: string) => {
    const nextProvider = settings.image_generation.providers.find((row) => row.name === provider);
    onChangeForm((prev) => ({
      ...prev,
      provider,
      model: nextProvider?.default_model || nextProvider?.models?.[0] || prev.model,
    }));
  };

  return (
    <div className="space-y-7">
      <section>
        <SettingsSectionTitle>{tx("settings.sections.imageGeneration", "Image generation")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={tx("settings.rows.imageGeneration", "Image generation")}
            description={tx("settings.help.imageGeneration", "Expose generate_image in chats when a configured image provider is available.")}
          >
            <ToggleButton
              checked={form.enabled}
              onChange={(enabled) => onChangeForm((prev) => ({ ...prev, enabled }))}
              ariaLabel={tx("settings.rows.imageGeneration", "Image generation")}
              label={form.enabled ? tx("settings.values.on", "On") : tx("settings.values.off", "Off")}
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.imageProvider", "Image provider")}
            description={tx("settings.help.imageProvider", "Choose the registry provider used by generate_image.")}
          >
            <ProviderPicker
              providers={settings.image_generation.providers}
              value={form.provider}
              emptyLabel={tx("settings.image.selectProvider", "Select provider")}
              showProviderLogos={showBrandLogos}
              onChange={selectProvider}
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.imageProviderStatus", "Provider status")}
            description={tx("settings.help.imageProviderStatus", "Image generation reuses provider credentials from Providers.")}
          >
            <div className="flex flex-wrap items-center justify-end gap-2">
              <StatusPill tone={providerConfigured ? "success" : "neutral"}>
                {providerConfigured
                  ? tx("settings.values.configured", "Configured")
                  : tx("settings.values.notConfigured", "Not configured")}
              </StatusPill>
              {!providerConfigured ? (
                <Button size="sm" variant="outline" onClick={onOpenProviders} className="rounded-full">
                  {tx("settings.image.configureProvider", "Configure provider")}
                </Button>
              ) : null}
            </div>
          </SettingsRow>
          <SettingsRow title={tx("settings.rows.imageProviderBase", "Provider base")}>
            <span className="max-w-[320px] truncate text-right text-[13px] text-muted-foreground">
              {selectedProvider?.api_base || selectedProvider?.default_api_base || selectedProvider?.name || tx("settings.values.notAvailable", "Not available")}
            </span>
          </SettingsRow>
        </SettingsGroup>
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.sections.imageDefaults", "Defaults")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={tx("settings.rows.imageModel", "Image model")}
            description={tx("settings.help.imageModel", "Model name sent to the selected image provider.")}
          >
            <ModelIdPicker
              token={token}
              settings={settings}
              provider={form.provider}
              models={selectedProvider?.models ?? []}
              value={form.model}
              showProviderLogos={showBrandLogos}
              emptyLabel={tx("settings.image.selectModel", "Select image model")}
              searchPlaceholder={tx(
                "settings.image.searchOrTypeModel",
                "Search or type model ID",
              )}
              emptyMessage={tx(
                "settings.image.typeModelId",
                "Type the model ID supported by this provider.",
              )}
              onChange={(model) => onChangeForm((prev) => ({ ...prev, model }))}
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.defaultAspectRatio", "Default aspect")}
            description={tx("settings.help.defaultAspectRatio", "Used when the prompt does not choose an aspect ratio.")}
          >
            <ProviderPicker
              providers={aspectOptions}
              value={form.defaultAspectRatio}
              emptyLabel={tx("settings.image.selectAspect", "Select aspect")}
              onChange={(defaultAspectRatio) =>
                onChangeForm((prev) => ({ ...prev, defaultAspectRatio }))
              }
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.defaultImageSize", "Default size")}
            description={tx("settings.help.defaultImageSize", "Size hint sent to providers that support it.")}
          >
            <ProviderPicker
              providers={sizeOptions}
              value={form.defaultImageSize}
              emptyLabel={tx("settings.image.selectSize", "Select size")}
              onChange={(defaultImageSize) =>
                onChangeForm((prev) => ({ ...prev, defaultImageSize }))
              }
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.maxImagesPerTurn", "Max images per turn")}
            description={tx("settings.help.maxImagesPerTurn", "Upper bound for one generate_image request.")}
          >
            <NumberInput
              value={form.maxImagesPerTurn}
              min={1}
              max={8}
              onChange={(maxImagesPerTurn) =>
                onChangeForm((prev) => ({ ...prev, maxImagesPerTurn }))
              }
            />
          </SettingsRow>
          <ReadOnlyRow title={tx("settings.rows.imageSaveDir", "Save directory")} value={settings.image_generation.save_dir} />
          <RestartSettingsFooter
            dirty={dirty}
            saving={saving}
            pendingRestart={requiresRestartPending}
            disabled={missingCredential}
            message={
              missingCredential
                ? tx("settings.image.missingCredential", "Configure this provider before enabling image generation.")
                : undefined
            }
            dirtyMessage={tx("settings.status.restartAfterSaving", "Save changes, then restart when ready.")}
            pendingMessage={tx("settings.status.savedRestartApply", "Saved. Restart when ready.")}
            onSave={onSave}
            onRestart={onRestart}
            isRestarting={isRestarting}
          />
        </SettingsGroup>
      </section>
    </div>
  );
}

function TranscriptionSettings({
  settings,
  form,
  dirty,
  saving,
  onChangeForm,
  onSave,
  onOpenProviders,
  showBrandLogos,
  onRestart,
  isRestarting,
  requiresRestartPending,
}: {
  settings: SettingsPayload;
  form: TranscriptionSettingsUpdate;
  dirty: boolean;
  saving: boolean;
  onChangeForm: Dispatch<SetStateAction<TranscriptionSettingsUpdate>>;
  onSave: () => void;
  onOpenProviders: () => void;
  showBrandLogos: boolean;
  onRestart?: () => void;
  isRestarting?: boolean;
  requiresRestartPending: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const transcription = settings.transcription ?? DEFAULT_TRANSCRIPTION_SETTINGS;
  const selectedProvider =
    transcription.providers.find((provider) => provider.name === form.provider) ??
    transcription.providers[0];
  const providerConfigured = !!selectedProvider?.configured;

  return (
    <section>
      <SettingsSectionTitle>{tx("settings.sections.voiceInput", "Voice input")}</SettingsSectionTitle>
      <SettingsGroup>
        <SettingsRow
          title={tx("settings.rows.transcription", "Transcription")}
          description={tx("settings.help.transcription", "Transcribe microphone input before sending it. Chat channel voice messages use the same settings.")}
        >
          <ToggleButton
            checked={form.enabled}
            onChange={(enabled) => onChangeForm((prev) => ({ ...prev, enabled }))}
            ariaLabel={tx("settings.rows.transcription", "Transcription")}
            label={form.enabled ? tx("settings.values.on", "On") : tx("settings.values.off", "Off")}
          />
        </SettingsRow>
        <SettingsRow
          title={tx("settings.rows.transcriptionProvider", "Provider")}
          description={tx("settings.help.transcriptionProvider", "Uses the matching provider credentials from Providers.")}
        >
          <ProviderPicker
            providers={transcription.providers}
            value={form.provider}
            emptyLabel={tx("settings.voice.selectProvider", "Select provider")}
            showProviderLogos={showBrandLogos}
            onChange={(provider) => onChangeForm((prev) => ({ ...prev, provider }))}
          />
        </SettingsRow>
        <SettingsRow
          title={tx("settings.rows.transcriptionProviderStatus", "Provider status")}
          description={tx("settings.help.transcriptionProviderStatus", "API keys stay under providers, not in transcription settings.")}
        >
          <div className="flex flex-wrap items-center justify-end gap-2">
            <StatusPill tone={providerConfigured ? "success" : "neutral"}>
              {providerConfigured
                ? tx("settings.values.configured", "Configured")
                : tx("settings.values.notConfigured", "Not configured")}
            </StatusPill>
            {!providerConfigured ? (
              <Button size="sm" variant="outline" onClick={onOpenProviders} className="rounded-full">
                {tx("settings.voice.configureProvider", "Configure provider")}
              </Button>
            ) : null}
          </div>
        </SettingsRow>
        <SettingsRow
          title={tx("settings.rows.transcriptionModel", "Model")}
          description={tx("settings.help.transcriptionModel", "Leave as the resolved default unless your provider needs a custom model id.")}
        >
          <Input
            value={form.model}
            onChange={(event) => onChangeForm((prev) => ({ ...prev, model: event.target.value }))}
            className="h-8 w-[min(300px,70vw)] rounded-full text-[13px]"
          />
        </SettingsRow>
        <SettingsRow
          title={tx("settings.rows.transcriptionLanguage", "Language")}
          description={tx("settings.help.transcriptionLanguage", "Optional ISO-639 hint such as en, zh, ja, or ko.")}
        >
          <Input
            value={form.language}
            onChange={(event) => onChangeForm((prev) => ({ ...prev, language: event.target.value }))}
            placeholder={tx("settings.voice.languageAuto", "Auto")}
            className="h-8 w-[min(180px,60vw)] rounded-full text-[13px]"
          />
        </SettingsRow>
        <SettingsRow title={tx("settings.rows.voiceLimits", "Limits")}>
          <div className="flex flex-wrap justify-end gap-2">
            <NumberInput
              value={form.maxDurationSec}
              min={1}
              max={600}
              suffix="s"
              onChange={(maxDurationSec) => onChangeForm((prev) => ({ ...prev, maxDurationSec }))}
            />
            <NumberInput
              value={form.maxUploadMb}
              min={1}
              max={100}
              suffix="MB"
              onChange={(maxUploadMb) => onChangeForm((prev) => ({ ...prev, maxUploadMb }))}
            />
          </div>
        </SettingsRow>
        <RestartSettingsFooter
          dirty={dirty}
          saving={saving}
          pendingRestart={requiresRestartPending}
          dirtyMessage={tx("settings.status.restartAfterSaving", "Save changes, then restart when ready.")}
          pendingMessage={tx("settings.status.savedRestartApply", "Saved. Restart when ready.")}
          onSave={onSave}
          onRestart={onRestart}
          isRestarting={isRestarting}
        />
      </SettingsGroup>
    </section>
  );
}

function WebSettings({
  settings,
  form,
  keyVisible,
  keyEditing,
  saving,
  onChangeForm,
  onChangeProvider,
  onToggleKey,
  onToggleKeyEditing,
  onReset,
  onSave,
  showBrandLogos,
  onRestart,
  isRestarting,
  requiresRestartPending,
  olostepFeature,
  olostepInstalling,
  capabilityError,
}: {
  settings: SettingsPayload;
  form: WebSearchSettingsUpdate;
  keyVisible: boolean;
  keyEditing: boolean;
  saving: boolean;
  onChangeForm: Dispatch<SetStateAction<WebSearchSettingsUpdate>>;
  onChangeProvider: (provider: string) => void;
  onToggleKey: () => void;
  onToggleKeyEditing: () => void;
  onReset: () => void;
  onSave: () => void;
  showBrandLogos: boolean;
  onRestart?: () => void;
  isRestarting?: boolean;
  requiresRestartPending: boolean;
  olostepFeature?: NanobotFeatureInfo;
  olostepInstalling: boolean;
  capabilityError: string | null;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const selectedProvider =
    settings.web_search.providers.find((provider) => provider.name === form.provider) ??
    settings.web_search.providers[0];
  const hasExistingSecret =
    webSearchProviderAcceptsApiKey(selectedProvider) &&
    form.provider === settings.web_search.provider &&
    !!settings.web_search.api_key_hint;
  const showKeyInput = webSearchProviderAcceptsApiKey(selectedProvider) && (!hasExistingSecret || keyEditing);
  const apiKey = form.apiKey?.trim() ?? "";
  const baseUrl = form.baseUrl?.trim() ?? "";
  const effectiveJinaReader = form.useJinaReader ?? settings.web.fetch.use_jina_reader;
  const dirty =
    form.provider !== settings.web_search.provider ||
    apiKey.length > 0 ||
    baseUrl !== (settings.web_search.base_url ?? "") ||
    form.maxResults !== settings.web_search.max_results ||
    form.timeout !== settings.web_search.timeout ||
    effectiveJinaReader !== settings.web.fetch.use_jina_reader;
  const jinaReaderDirty = effectiveJinaReader !== settings.web.fetch.use_jina_reader;
  const missingCredential =
    webSearchProviderRequiresApiKey(selectedProvider)
      ? !apiKey && !hasExistingSecret
      : selectedProvider?.credential === "base_url"
        ? !baseUrl
        : false;

  return (
    <div className="space-y-7">
      <section>
        <SettingsSectionTitle>{tx("settings.sections.webSearch", "Web search")}</SettingsSectionTitle>
        {form.provider === "olostep" && olostepFeature && !olostepFeature.installed ? (
          <div className="mb-3">
            <CapabilityInstallNotice
              title={tx("settings.capabilities.searchSupport", "Search provider support")}
              description={tx(
                "settings.capabilities.searchInstallOnSave",
                "Olostep support will be installed automatically when you save.",
              )}
              installing={olostepInstalling}
            />
          </div>
        ) : null}
        {capabilityError ? (
          <p className="mb-3 text-[12px] text-destructive">{capabilityError}</p>
        ) : null}
        <SettingsGroup>
          <SettingsRow
            title={t("settings.byok.webSearch.provider")}
            description={t("settings.byok.webSearch.providerHelp")}
          >
            <ProviderPicker
              providers={settings.web_search.providers}
              value={form.provider}
              emptyLabel={t("settings.byok.webSearch.selectProvider")}
              showProviderLogos={showBrandLogos}
              onChange={onChangeProvider}
            />
          </SettingsRow>

          {selectedProvider?.credential === "none" ? (
            <SettingsRow
              title={t("settings.byok.webSearch.credentials")}
              description={t("settings.byok.webSearch.noCredentialHelp")}
            >
              <StatusPill tone="success">{t("settings.byok.webSearch.noCredentialRequired")}</StatusPill>
            </SettingsRow>
          ) : null}

          {webSearchProviderAcceptsApiKey(selectedProvider) ? (
            <SettingsRow
              title={t("settings.byok.apiKey")}
              description={t("settings.byok.webSearch.apiKeyHelp")}
            >
              <div className="relative w-[280px] max-w-full">
                {showKeyInput ? (
                  <>
                    <Input
                      type={keyVisible ? "text" : "password"}
                      value={form.apiKey ?? ""}
                      onChange={(event) =>
                        onChangeForm((prev) => ({ ...prev, apiKey: event.target.value }))
                      }
                      placeholder={
                        hasExistingSecret
                          ? t("settings.byok.apiKeyConfiguredPlaceholder")
                          : t("settings.byok.apiKeyPlaceholder")
                      }
                      className="h-9 rounded-full pr-11 text-[13px]"
                    />
                    <Button
                      type="button"
                      variant="ghost"
                      size="icon"
                      onClick={onToggleKey}
                      aria-label={
                        keyVisible ? t("settings.byok.hideApiKey") : t("settings.byok.showApiKey")
                      }
                      className="absolute right-1 top-1/2 h-7 w-7 -translate-y-1/2 rounded-full text-muted-foreground hover:bg-muted hover:text-foreground"
                    >
                      {keyVisible ? (
                        <EyeOff className="h-3.5 w-3.5" aria-hidden />
                      ) : (
                        <Eye className="h-3.5 w-3.5" aria-hidden />
                      )}
                    </Button>
                  </>
                ) : (
                  <>
                    <div className="flex h-9 items-center rounded-full border border-input bg-background px-3 pr-11 text-[13px] text-muted-foreground">
                      {settings.web_search.api_key_hint ?? t("settings.byok.configuredKeyHint")}
                    </div>
                    <Button
                      type="button"
                      variant="ghost"
                      size="icon"
                      onClick={onToggleKeyEditing}
                      aria-label={t("settings.actions.edit")}
                      className="absolute right-1 top-1/2 h-7 w-7 -translate-y-1/2 rounded-full text-muted-foreground hover:bg-muted hover:text-foreground"
                    >
                      <Pencil className="h-3.5 w-3.5" aria-hidden />
                    </Button>
                  </>
                )}
              </div>
            </SettingsRow>
          ) : null}

          {selectedProvider?.credential === "base_url" ? (
            <SettingsRow
              title={t("settings.byok.webSearch.baseUrl")}
              description={t("settings.byok.webSearch.baseUrlHelp")}
            >
              <Input
                value={form.baseUrl ?? ""}
                onChange={(event) =>
                  onChangeForm((prev) => ({ ...prev, baseUrl: event.target.value }))
                }
                placeholder={t("settings.byok.webSearch.baseUrlPlaceholder")}
                className="h-9 w-[280px] rounded-full text-[13px]"
              />
            </SettingsRow>
          ) : null}
        </SettingsGroup>
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.sections.webBehavior", "Behavior")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={tx("settings.rows.maxResults", "Max results")}
            description={tx("settings.help.maxResults", "Results returned by each web_search call.")}
          >
            <NumberInput
              value={form.maxResults ?? settings.web_search.max_results}
              min={1}
              max={10}
              onChange={(maxResults) => onChangeForm((prev) => ({ ...prev, maxResults }))}
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.timeout", "Timeout")}
            description={tx("settings.help.timeout", "Seconds before a search provider request times out.")}
          >
            <NumberInput
              value={form.timeout ?? settings.web_search.timeout}
              min={1}
              max={120}
              onChange={(timeout) => onChangeForm((prev) => ({ ...prev, timeout }))}
              suffix="s"
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.jinaReader", "Jina reader")}
            description={tx("settings.help.jinaReader", "Use Jina Reader for web_fetch when available.")}
          >
            <ToggleButton
              checked={effectiveJinaReader}
              onChange={(useJinaReader) => onChangeForm((prev) => ({ ...prev, useJinaReader }))}
              ariaLabel={tx("settings.rows.jinaReader", "Jina reader")}
              label={effectiveJinaReader ? tx("settings.values.on", "On") : tx("settings.values.off", "Off")}
            />
          </SettingsRow>
          <RestartSettingsFooter
            dirty={dirty}
            saving={saving}
            pendingRestart={requiresRestartPending}
            disabled={missingCredential}
            message={
              missingCredential
                ? t("settings.byok.webSearch.missingCredential")
                : requiresRestartPending && !dirty
                  ? tx("settings.status.savedRestartApply", "Saved. Restart when ready.")
                  : jinaReaderDirty
                    ? tx("settings.status.restartAfterSaving", "Save changes, then restart when ready.")
                    : dirty
                      ? t("settings.byok.webSearch.saveHint")
                      : undefined
            }
            onSave={onSave}
            onRestart={onRestart}
            onReset={onReset}
            isRestarting={isRestarting}
          />
        </SettingsGroup>
      </section>
    </div>
  );
}

function AutomationsSettings({
  payload,
  loading,
  query,
  filter,
  sort,
  actionKey,
  error,
  onQueryChange,
  onFilterChange,
  onSortChange,
  onAction,
  onRequestEdit,
  onRequestDelete,
}: {
  payload: AutomationsPayload | null;
  loading: boolean;
  query: string;
  filter: AutomationFilter;
  sort: AutomationSort;
  actionKey: string | null;
  error: string | null;
  onQueryChange: (value: string) => void;
  onFilterChange: (value: AutomationFilter) => void;
  onSortChange: (value: AutomationSort) => void;
  onAction: (action: AutomationAction, job: SessionAutomationJob) => void | Promise<void>;
  onRequestEdit: (job: SessionAutomationJob) => void;
  onRequestDelete: (job: SessionAutomationJob) => void;
}) {
  const { t, i18n } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  const jobs = payload?.jobs ?? [];
  const locale = i18n.resolvedLanguage || i18n.language;
  const [selectedJobId, setSelectedJobId] = useState<string | null>(null);
  const filtered = useMemo(() => {
    const searchTokens = parseAutomationSearchQuery(query);
    return sortAutomationJobs(jobs, sort)
      .filter((job) => automationMatchesFilter(job, filter))
      .filter((job) => !searchTokens.length || automationMatchesSearch(job, searchTokens));
  }, [filter, jobs, query, sort]);
  const activeCount = jobs.filter((job) => {
    const key = automationStatusKey(job);
    return key === "active" || key === "running";
  }).length;
  const pausedCount = jobs.filter((job) => automationStatusKey(job) === "paused").length;
  const failedCount = jobs.filter(automationNeedsAttention).length;
  const systemCount = jobs.filter((job) => job.protected).length;
  const summaryOptions: Array<{ value: AutomationFilter; label: string; count: number }> = [
    { value: "all", label: tx("settings.automations.filters.all", "All"), count: jobs.length },
    { value: "active", label: tx("settings.automations.filters.active", "Active"), count: activeCount },
    { value: "paused", label: tx("settings.automations.filters.paused", "Paused"), count: pausedCount },
    { value: "failed", label: tx("settings.automations.filters.failed", "Needs attention"), count: failedCount },
    { value: "system", label: tx("settings.automations.filters.system", "System"), count: systemCount },
  ];
  const sortLabel = {
    next: tx("settings.automations.sort.next", "Next run"),
    last: tx("settings.automations.sort.last", "Last run"),
    updated: tx("settings.automations.sort.updated", "Updated"),
    name: tx("settings.automations.sort.name", "Name"),
  } satisfies Record<AutomationSort, string>;
  const selectedJob = filtered.find((job) => job.id === selectedJobId) ?? filtered[0] ?? null;

  useEffect(() => {
    if (!filtered.length) {
      if (selectedJobId !== null) setSelectedJobId(null);
      return;
    }
    if (!selectedJobId || !filtered.some((job) => job.id === selectedJobId)) {
      setSelectedJobId(filtered[0].id);
    }
  }, [filtered, selectedJobId]);

  return (
    <div className="space-y-5">
      <section className="shrink-0">
        <div className="mx-auto flex w-full max-w-[56rem] flex-col gap-3">
          <div className="-mx-1 overflow-x-auto px-1 pb-0.5">
            <div className="grid w-full min-w-[36rem] grid-cols-5 gap-1 rounded-[15px] bg-muted p-1">
              {summaryOptions.map((option) => (
                <button
                  key={option.value}
                  type="button"
                  onClick={() => onFilterChange(option.value)}
                  className={cn(
                    "inline-flex h-8 min-w-0 shrink-0 items-center justify-center gap-2 whitespace-nowrap rounded-[11px] px-3 text-[12px] font-medium text-muted-foreground transition-colors",
                    filter === option.value && "bg-background text-foreground",
                    automationFilterToneClass(option.value, option.count, filter === option.value),
                  )}
                >
                  <span>{option.label}</span>
                  <span
                    className={cn(
                      "min-w-5 shrink-0 rounded-full bg-background/75 px-1.5 py-0.5 text-center text-[11px] tabular-nums text-muted-foreground",
                      automationFilterCountClass(option.value, option.count),
                    )}
                  >
                    {option.count}
                  </span>
                </button>
              ))}
            </div>
          </div>

          <div className="grid min-w-0 gap-2 sm:grid-cols-[minmax(0,1fr)_auto] sm:items-center">
            <div className="relative min-w-0">
              <Search className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground/70" />
              <Input
                value={query}
                onChange={(event) => onQueryChange(event.target.value)}
                placeholder={tx(
                  "settings.automations.search",
                  "Search task, message, linked chat, or schedule",
                )}
                className={cn(
                  "h-9 w-full rounded-[13px] pl-9 text-[13px]",
                  SETTINGS_SEARCH_INPUT_CLASS,
                )}
              />
            </div>
            <DropdownMenu>
              <DropdownMenuTrigger asChild>
                <button
                  type="button"
                  className="inline-flex h-9 min-w-[8.5rem] items-center justify-center gap-1.5 whitespace-nowrap rounded-[13px] border border-border/45 bg-settings-surface px-3 text-[12px] font-medium text-muted-foreground transition-colors hover:bg-muted hover:text-foreground sm:w-auto"
                >
                  <ArrowUpDown className="h-3.5 w-3.5" aria-hidden />
                  <span>{sortLabel[sort]}</span>
                  <ChevronDown className="h-3.5 w-3.5" aria-hidden />
                </button>
              </DropdownMenuTrigger>
              <DropdownMenuContent align="end" className="min-w-40">
                {(Object.keys(sortLabel) as AutomationSort[]).map((value) => (
                  <DropdownMenuItem key={value} onClick={() => onSortChange(value)}>
                    <span>{sortLabel[value]}</span>
                    {sort === value ? <Check className="ml-auto h-3.5 w-3.5" aria-hidden /> : null}
                  </DropdownMenuItem>
                ))}
              </DropdownMenuContent>
            </DropdownMenu>
          </div>
        </div>
      </section>

      {error ? (
        <div className="flex items-center gap-2 rounded-[18px] border border-destructive/20 bg-destructive/5 px-4 py-3 text-[13px] text-destructive">
          <CircleAlert className="h-4 w-4 shrink-0" aria-hidden />
          <span>{error}</span>
        </div>
      ) : null}

      {loading && !payload ? (
        <div className="flex h-44 items-center justify-center rounded-[22px] bg-settings-surface text-[13px] text-muted-foreground">
          <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden />
          {tx("settings.automations.loading", "Loading automations...")}
        </div>
      ) : filtered.length && selectedJob ? (
        <section className="grid min-h-0 overflow-hidden rounded-[22px] bg-settings-surface xl:grid-cols-[minmax(16rem,18rem)_minmax(0,1fr)] xl:items-stretch">
          <aside className="flex min-h-0 flex-col overflow-hidden border-b border-border/35 bg-settings-surface xl:border-b-0 xl:border-r">
            <div className="flex shrink-0 items-center justify-between gap-3 px-4 py-3">
              <h2 className="text-[13px] font-semibold tracking-[-0.01em] text-foreground/85">
                {tx("settings.automations.queue", "Queue")}
              </h2>
              <span className="rounded-full bg-orange-100/60 px-2 py-0.5 text-[11px] text-orange-800/70 tabular-nums dark:bg-orange-300/10 dark:text-orange-200/75">
                {filtered.length}
              </span>
            </div>
            <div
              className="max-h-[28rem] space-y-1 overflow-y-auto overscroll-contain px-2 pb-2 xl:max-h-[calc(100vh-24rem)]"
              role="list"
              aria-label={tx("settings.automations.queue", "Queue")}
            >
              {filtered.map((job) => (
                <AutomationListItem
                  key={job.id}
                  job={job}
                  locale={locale}
                  selected={job.id === selectedJob.id}
                  onSelect={() => setSelectedJobId(job.id)}
                />
              ))}
            </div>
          </aside>
          <AutomationDetailPanel
            job={selectedJob}
            locale={locale}
            actionKey={actionKey}
            onAction={onAction}
            onRequestEdit={onRequestEdit}
            onRequestDelete={onRequestDelete}
          />
        </section>
      ) : (
        <div className="rounded-[22px] bg-settings-surface px-5 py-12 text-center text-[13px] text-muted-foreground">
          <div>
            {jobs.length
              ? tx("settings.automations.noMatches", "No automations match this view.")
              : tx("settings.automations.empty", "No automations yet.")}
          </div>
          {!jobs.length ? (
            <div className="mx-auto mt-2 max-w-[28rem] text-[12px] leading-5">
              {tx(
                "settings.automations.emptyHint",
                "Create one from where it should run so nanobot keeps the right context.",
              )}
            </div>
          ) : null}
        </div>
      )}
    </div>
  );
}

function AutomationListItem({
  job,
  locale,
  selected,
  onSelect,
}: {
  job: SessionAutomationJob;
  locale: string;
  selected: boolean;
  onSelect: () => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  const status = automationStatus(job, tx);
  const origin = automationOriginLabel(job, tx);
  const nextRun = formatAutomationNext(job, tx);
  const summary = automationSummary(job, tx);

  return (
    <div role="listitem">
      <button
        type="button"
        aria-pressed={selected}
        onClick={onSelect}
        className={cn(
          "group grid w-full grid-cols-[minmax(0,1fr)_auto] gap-3 rounded-[18px] px-3 py-3.5 text-left transition-colors",
          selected
            ? "bg-background/80 text-foreground"
            : "text-muted-foreground hover:bg-background/55 hover:text-foreground",
        )}
      >
        <span className="min-w-0">
          <span className="flex min-w-0 items-center gap-2.5">
            <span
              className={cn("h-2 w-2 shrink-0 rounded-full", automationStatusDotClass(job))}
              aria-hidden
            />
            <span className="truncate text-[13.5px] font-medium text-foreground">
              {job.name || job.id}
            </span>
          </span>
          <span className="mt-1.5 line-clamp-2 text-[12px] leading-5 text-muted-foreground">
            {summary}
          </span>
          <span className="mt-2.5 flex min-w-0 items-center gap-2 text-[11.5px] leading-none text-muted-foreground">
            <span className="truncate" title={formatAutomationNextTitle(job, locale, tx)}>
              {nextRun}
            </span>
            <span className="h-1 w-1 shrink-0 rounded-full bg-muted-foreground/35" aria-hidden />
            <span className="truncate">{origin}</span>
          </span>
        </span>
        <span className="flex shrink-0 flex-col items-end gap-2 pt-0.5">
          <span className="rounded-full bg-background/70 px-2 py-0.5 text-[11px] font-medium text-muted-foreground">
            {status.label}
          </span>
          {job.delete_after_run ? (
            <span className="rounded-full bg-background/80 px-2 py-0.5 text-[11px] font-medium text-muted-foreground">
              {tx("settings.automations.oneShot", "One-time")}
            </span>
          ) : null}
          <ChevronRight
            className={cn(
              "h-3.5 w-3.5 text-muted-foreground/55 transition-opacity",
              selected ? "opacity-100" : "opacity-0 group-hover:opacity-70",
            )}
            aria-hidden
          />
        </span>
      </button>
    </div>
  );
}

function AutomationDetailPanel({
  job,
  locale,
  actionKey,
  onAction,
  onRequestEdit,
  onRequestDelete,
}: {
  job: SessionAutomationJob;
  locale: string;
  actionKey: string | null;
  onAction: (action: AutomationAction, job: SessionAutomationJob) => void | Promise<void>;
  onRequestEdit: (job: SessionAutomationJob) => void;
  onRequestDelete: (job: SessionAutomationJob) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  const status = automationStatus(job, tx);
  const origin = automationOriginLabel(job, tx);
  const originHref = job.origin?.channel === "websocket" && job.origin.session_key
    ? `#/chat/${encodeURIComponent(job.origin.session_key)}`
    : null;
  const created = job.created_at_ms ? fmtDateTime(job.created_at_ms, locale) : null;
  const updated = job.updated_at_ms ? fmtDateTime(job.updated_at_ms, locale) : null;
  const localTrigger = isLocalTriggerAutomation(job);
  const triggerCommand = automationTriggerCommand(job);
  const message = automationDetailText(job, tx);
  const messageLabel = localTrigger
    ? tx("settings.automations.fields.command", "Command")
    : tx("settings.automations.fields.message", "Message");
  const schedule = formatAutomationSchedule(job, locale, tx);
  const [messageExpanded, setMessageExpanded] = useState(false);
  const [commandCopied, setCommandCopied] = useState(false);
  const messageNeedsExpansion = automationMessageNeedsExpansion(message);

  useEffect(() => {
    setMessageExpanded(false);
    setCommandCopied(false);
  }, [job.id]);

  return (
    <article className="flex min-h-0 min-w-0 flex-col overflow-hidden bg-settings-surface">
      <div className="shrink-0 border-b border-border/35 px-4 py-3.5 dark:border-white/10 sm:px-5">
        <div className="flex flex-col gap-3 lg:flex-row lg:items-start lg:justify-between">
          <div className="min-w-0">
            <div className="flex min-w-0 flex-wrap items-center gap-2">
              <h3 className="min-w-0 truncate text-[18px] font-medium leading-7 text-foreground">
                {job.name || job.id}
              </h3>
              <AutomationStatusBadge tone={status.tone}>{status.label}</AutomationStatusBadge>
              {job.delete_after_run ? (
                <AutomationStatusBadge>{tx("settings.automations.oneShot", "One-time")}</AutomationStatusBadge>
              ) : null}
            </div>
            <p className="mt-1 truncate text-[12.5px] leading-5 text-muted-foreground">
              {schedule} · {origin}
            </p>
          </div>
          <AutomationActionGroup
            job={job}
            actionKey={actionKey}
            onAction={onAction}
            onRequestEdit={onRequestEdit}
            onRequestDelete={onRequestDelete}
          />
        </div>
      </div>

      <div className="grid min-h-0 min-w-0 flex-1 overflow-hidden lg:grid-cols-[minmax(0,1fr)_14.5rem]">
        <div className="min-h-0 min-w-0 space-y-3 overflow-y-auto overscroll-contain p-4 sm:p-5">
          <section className="rounded-[20px] bg-background/55 px-4 py-3.5">
            <div className="flex items-center justify-between gap-3">
              <div className="text-[11px] font-medium leading-none text-muted-foreground/75">
                {messageLabel}
              </div>
              {localTrigger && triggerCommand ? (
                <Button
                  type="button"
                  variant="ghost"
                  size="sm"
                  className="h-7 shrink-0 rounded-full px-2 text-[11.5px]"
                  onClick={() => {
                    void copyTextToClipboard(triggerCommand).then((ok) => {
                      if (ok) setCommandCopied(true);
                    });
                  }}
                >
                  {commandCopied ? (
                    <Check className="mr-1.5 h-3.5 w-3.5" aria-hidden />
                  ) : (
                    <Clipboard className="mr-1.5 h-3.5 w-3.5" aria-hidden />
                  )}
                  {commandCopied
                    ? tx("settings.automations.commandCopied", "Copied")
                    : tx("settings.automations.copyCommand", "Copy")}
                </Button>
              ) : null}
            </div>
            <div
              className={cn(
                "mt-3 whitespace-pre-wrap break-words text-[13px] leading-6 text-foreground/85",
                localTrigger && "font-mono text-[12.5px]",
                !messageExpanded && messageNeedsExpansion && "line-clamp-6",
              )}
            >
              {message}
            </div>
            {messageNeedsExpansion ? (
              <button
                type="button"
                className="mt-3 inline-flex text-[12px] font-medium text-muted-foreground underline-offset-2 hover:text-foreground hover:underline"
                onClick={() => setMessageExpanded((value) => !value)}
              >
                {messageExpanded
                  ? tx("settings.automations.message.showLess", "Show less")
                  : tx("settings.automations.message.showMore", "Show full message")}
              </button>
            ) : null}
          </section>

          <div className="grid gap-3 md:grid-cols-2">
            <AutomationDetail
              label={tx("settings.automations.labels.next", "Next")}
              title={formatAutomationNextTitle(job, locale, tx)}
            >
              {formatAutomationNext(job, tx)}
            </AutomationDetail>
            <AutomationDetail label={tx("settings.automations.labels.origin", "Linked chat")} title={origin}>
              {originHref ? (
                <a
                  className="inline-flex max-w-full items-center gap-1 text-foreground/80 underline-offset-2 hover:underline"
                  href={originHref}
                >
                  <span className="truncate">{origin}</span>
                  <ExternalLink className="h-3 w-3 shrink-0" aria-hidden />
                </a>
              ) : (
                origin
              )}
            </AutomationDetail>
          </div>

          {job.state.last_error ? (
            <div className="rounded-[16px] border border-destructive/20 bg-destructive/8 px-3 py-2 text-[12px] leading-5 text-destructive">
              {job.state.last_error}
            </div>
          ) : null}
        </div>

        <aside className="min-h-0 overflow-y-auto overscroll-contain border-t border-border/35 bg-settings-surface p-4 text-[12px] text-muted-foreground lg:border-l lg:border-t-0">
          <div className="grid gap-3">
            <AutomationDetail
              label={tx("settings.automations.labels.schedule", "Schedule")}
              title={schedule}
            >
              {schedule}
            </AutomationDetail>
            <div className="rounded-[18px] bg-background/55 p-3">
              <div className="grid gap-3">
                {created ? (
                  <div>
                    <div className="text-[11px] leading-none text-muted-foreground/75">
                      {tx("settings.automations.labels.created", "Created")}
                    </div>
                    <div className="mt-1.5 text-[12.5px] leading-5 text-foreground/80">{created}</div>
                  </div>
                ) : null}
                {updated ? (
                  <div>
                    <div className="text-[11px] leading-none text-muted-foreground/75">
                      {tx("settings.automations.labels.updated", "Updated")}
                    </div>
                    <div className="mt-1.5 text-[12.5px] leading-5 text-foreground/80">{updated}</div>
                  </div>
                ) : null}
                <div>
                  <div className="text-[11px] leading-none text-muted-foreground/75">ID</div>
                  <div className="mt-1.5 break-all font-mono text-[11.5px] leading-5 text-foreground/70">
                    {job.id}
                  </div>
                </div>
              </div>
            </div>
          </div>
        </aside>
      </div>
    </article>
  );
}

function AutomationActionGroup({
  job,
  actionKey,
  onAction,
  onRequestEdit,
  onRequestDelete,
}: {
  job: SessionAutomationJob;
  actionKey: string | null;
  onAction: (action: AutomationAction, job: SessionAutomationJob) => void | Promise<void>;
  onRequestEdit: (job: SessionAutomationJob) => void;
  onRequestDelete: (job: SessionAutomationJob) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  const canManage = !job.protected;
  const hasLinkedChat = Boolean(job.origin);
  const localTrigger = isLocalTriggerAutomation(job);
  const canRun = canManage && hasLinkedChat && job.enabled && !job.state.pending && !localTrigger;
  const toggleAction: AutomationAction = job.enabled ? "disable" : "enable";
  const canToggle = canManage && (job.enabled || hasLinkedChat);
  const toggleBusy = actionKey === `${toggleAction}:${job.id}`;

  if (!canManage) {
    return (
      <span className="inline-flex h-9 items-center rounded-full bg-muted px-3 text-[12px] font-medium text-muted-foreground">
        {tx("settings.automations.protected", "Protected")}
      </span>
    );
  }

  return (
    <div className="flex shrink-0 items-center gap-1 rounded-full bg-background/65 p-1">
      <AppsActionButton
        ariaLabel={tx("settings.automations.edit", "Edit")}
        disabled={Boolean(actionKey)}
        onClick={() => onRequestEdit(job)}
      >
        <Pencil className="h-4 w-4" aria-hidden />
      </AppsActionButton>
      {!localTrigger ? (
        <AppsActionButton
          ariaLabel={tx("settings.automations.runNow", "Run now")}
          busy={actionKey === `run:${job.id}`}
          disabled={!canRun}
          onClick={() => void onAction("run", job)}
        >
          <PlayCircle className="h-4 w-4" aria-hidden />
        </AppsActionButton>
      ) : null}
      <AppsActionButton
        ariaLabel={
          job.enabled
            ? tx("settings.automations.pause", "Pause")
            : tx("settings.automations.resume", "Resume")
        }
        busy={toggleBusy}
        disabled={!canToggle}
        onClick={() => void onAction(toggleAction, job)}
      >
        {job.enabled ? (
          <PauseCircle className="h-4 w-4" aria-hidden />
        ) : (
          <PlayCircle className="h-4 w-4" aria-hidden />
        )}
      </AppsActionButton>
      <AppsActionButton
        ariaLabel={tx("settings.automations.delete", "Delete")}
        tone="danger"
        disabled={Boolean(actionKey)}
        onClick={() => onRequestDelete(job)}
      >
        <Trash2 className="h-4 w-4" aria-hidden />
      </AppsActionButton>
    </div>
  );
}

function AutomationStatusBadge({
  tone = "neutral",
  children,
}: {
  tone?: "neutral" | "success" | "warning";
  children: ReactNode;
}) {
  return (
    <span
      className={cn(
        "inline-flex h-6 items-center rounded-full px-2.5 text-[11.5px] font-medium",
        tone === "success" &&
          "bg-orange-100/72 text-orange-800 dark:bg-orange-300/12 dark:text-orange-200",
        tone === "warning" &&
          "bg-amber-100/80 text-amber-800 dark:bg-amber-300/14 dark:text-amber-200",
        tone === "neutral" &&
          "bg-white/64 text-muted-foreground dark:bg-background/35 dark:text-muted-foreground",
      )}
    >
      {children}
    </span>
  );
}

function automationMessageNeedsExpansion(message: string): boolean {
  return message.length > 360 || message.split(/\r?\n/).length > 6;
}

function AutomationDetail({
  label,
  title,
  secondary,
  children,
}: {
  label: string;
  title?: string;
  secondary?: ReactNode;
  children: ReactNode;
}) {
  return (
    <div className="min-w-0 rounded-[17px] bg-background/55 px-3 py-3">
      <div className="text-[11px] font-medium leading-none text-muted-foreground/75">
        {label}
      </div>
      <div className="mt-1.5 min-w-0">
        <div className="line-clamp-2 text-[13px] leading-5 text-foreground/85" title={title}>
          {children}
        </div>
        {secondary ? (
          <div className="mt-0.5 truncate text-[11.5px] leading-4 text-muted-foreground" title={title}>
            {secondary}
          </div>
        ) : null}
      </div>
    </div>
  );
}

type AutomationEveryUnit = "second" | "minute" | "hour" | "day";

type AutomationEditDraft = {
  name: string;
  message: string;
  scheduleKind: "at" | "every" | "cron";
  everyValue: string;
  everyUnit: AutomationEveryUnit;
  cronExpr: string;
  tz: string;
  atLocal: string;
};
type AutomationScheduleUpdate = NonNullable<AutomationUpdatePayload["schedule"]>;

const AUTOMATION_EVERY_UNITS: Array<{ value: AutomationEveryUnit; ms: number }> = [
  { value: "second", ms: 1000 },
  { value: "minute", ms: 60_000 },
  { value: "hour", ms: 3_600_000 },
  { value: "day", ms: 86_400_000 },
];

function AutomationEditDialog({
  job,
  saving,
  onOpenChange,
  onSave,
}: {
  job: SessionAutomationJob | null;
  saving: boolean;
  onOpenChange: (open: boolean) => void;
  onSave: (job: SessionAutomationJob, values: AutomationUpdatePayload) => void | Promise<void>;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  const [draft, setDraft] = useState<AutomationEditDraft>(() => automationDraftFromJob(null));
  const localTrigger = isLocalTriggerAutomation(job);

  useEffect(() => {
    setDraft(automationDraftFromJob(job));
  }, [job]);

  const validation = automationEditDraftError(draft, job, tx);
  const scheduleOptions = [
    { value: "every", label: tx("settings.automations.scheduleTypes.every", "Interval") },
    { value: "cron", label: tx("settings.automations.scheduleTypes.cron", "Cron") },
    { value: "at", label: tx("settings.automations.scheduleTypes.at", "Once") },
  ];
  const unitLabels: Record<AutomationEveryUnit, string> = {
    second: tx("settings.automations.everyUnits.second", "Seconds"),
    minute: tx("settings.automations.everyUnits.minute", "Minutes"),
    hour: tx("settings.automations.everyUnits.hour", "Hours"),
    day: tx("settings.automations.everyUnits.day", "Days"),
  };

  const submit = (event: FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    const payload = automationUpdatePayloadFromDraft(draft, job);
    if (!job || typeof payload === "string") return;
    void onSave(job, payload);
  };

  return (
    <Dialog open={Boolean(job)} onOpenChange={onOpenChange}>
      {job ? (
        <DialogContent
          aria-describedby={undefined}
          className="w-[min(calc(100vw-2rem),34rem)] rounded-[26px]"
        >
          <form className="space-y-5" onSubmit={submit}>
            <DialogHeader>
              <DialogTitle>{tx("settings.automations.editTitle", "Edit automation")}</DialogTitle>
            </DialogHeader>

            <div className="space-y-4">
              <label className="block space-y-1.5">
                <span className="text-[12px] font-medium text-muted-foreground">
                  {tx("settings.automations.fields.name", "Name")}
                </span>
                <Input
                  value={draft.name}
                  onChange={(event) => setDraft((prev) => ({ ...prev, name: event.target.value }))}
                  className="h-10 rounded-[12px]"
                />
              </label>

              {!localTrigger ? (
                <label className="block space-y-1.5">
                  <span className="text-[12px] font-medium text-muted-foreground">
                    {tx("settings.automations.fields.message", "Message")}
                  </span>
                  <Textarea
                    value={draft.message}
                    onChange={(event) => setDraft((prev) => ({ ...prev, message: event.target.value }))}
                    className="min-h-[160px] resize-none rounded-[12px] text-[13px] leading-5"
                  />
                </label>
              ) : null}

              {!localTrigger ? (
                <div className="space-y-2">
                  <span className="text-[12px] font-medium text-muted-foreground">
                    {tx("settings.automations.fields.scheduleType", "Schedule type")}
                  </span>
                  <SegmentedControl
                    value={draft.scheduleKind}
                    options={scheduleOptions}
                    onChange={(value) =>
                      setDraft((prev) => ({
                        ...prev,
                        scheduleKind: value as AutomationEditDraft["scheduleKind"],
                      }))
                    }
                  />
                </div>
              ) : null}

              {!localTrigger && draft.scheduleKind === "every" ? (
                <div className="grid gap-2 sm:grid-cols-[minmax(0,1fr)_10rem]">
                  <label className="block space-y-1.5">
                    <span className="text-[12px] font-medium text-muted-foreground">
                      {tx("settings.automations.fields.every", "Every")}
                    </span>
                    <Input
                      type="number"
                      min={1}
                      step={1}
                      value={draft.everyValue}
                      onChange={(event) =>
                        setDraft((prev) => ({ ...prev, everyValue: event.target.value }))
                      }
                      className="h-10 rounded-[12px]"
                    />
                  </label>
                  <label className="block space-y-1.5">
                    <span className="text-[12px] font-medium text-muted-foreground">
                      {tx("settings.automations.fields.unit", "Unit")}
                    </span>
                    <select
                      value={draft.everyUnit}
                      onChange={(event) =>
                        setDraft((prev) => ({
                          ...prev,
                          everyUnit: event.target.value as AutomationEveryUnit,
                        }))
                      }
                      className="h-10 w-full rounded-[12px] border border-input bg-background px-3 text-[13px] text-foreground outline-none transition-colors focus-visible:ring-2 focus-visible:ring-ring"
                    >
                      {AUTOMATION_EVERY_UNITS.map((unit) => (
                        <option key={unit.value} value={unit.value}>
                          {unitLabels[unit.value]}
                        </option>
                      ))}
                    </select>
                  </label>
                </div>
              ) : null}

              {!localTrigger && draft.scheduleKind === "cron" ? (
                <div className="grid gap-2 sm:grid-cols-[minmax(0,1fr)_12rem]">
                  <label className="block space-y-1.5">
                    <span className="text-[12px] font-medium text-muted-foreground">
                      {tx("settings.automations.fields.cronExpression", "Cron expression")}
                    </span>
                    <Input
                      value={draft.cronExpr}
                      onChange={(event) => setDraft((prev) => ({ ...prev, cronExpr: event.target.value }))}
                      placeholder="0 9 * * *"
                      className="h-10 rounded-[12px] font-mono text-[13px]"
                    />
                  </label>
                  <label className="block space-y-1.5">
                    <span className="text-[12px] font-medium text-muted-foreground">
                      {tx("settings.automations.fields.timezone", "Timezone")}
                    </span>
                    <Input
                      value={draft.tz}
                      onChange={(event) => setDraft((prev) => ({ ...prev, tz: event.target.value }))}
                      placeholder="Asia/Shanghai"
                      className="h-10 rounded-[12px] text-[13px]"
                    />
                  </label>
                </div>
              ) : null}

              {!localTrigger && draft.scheduleKind === "at" ? (
                <label className="block space-y-1.5">
                  <span className="text-[12px] font-medium text-muted-foreground">
                    {tx("settings.automations.fields.runAt", "Run at")}
                  </span>
                  <Input
                    type="datetime-local"
                    value={draft.atLocal}
                    onChange={(event) => setDraft((prev) => ({ ...prev, atLocal: event.target.value }))}
                    className="h-10 rounded-[12px]"
                  />
                </label>
              ) : null}

              {validation ? (
                <div className="rounded-[12px] bg-destructive/8 px-3 py-2 text-[12px] text-destructive">
                  {validation}
                </div>
              ) : null}
            </div>

            <DialogFooter>
              <Button
                type="button"
                variant="ghost"
                onClick={() => onOpenChange(false)}
                disabled={saving}
                className="rounded-full"
              >
                {tx("settings.automations.cancel", "Cancel")}
              </Button>
              <Button type="submit" disabled={Boolean(validation) || saving} className="rounded-full">
                {saving ? <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden /> : null}
                {tx("settings.automations.save", "Save")}
              </Button>
            </DialogFooter>
          </form>
        </DialogContent>
      ) : null}
    </Dialog>
  );
}

function AutomationDeleteDialog({
  job,
  deleting,
  onOpenChange,
  onConfirm,
}: {
  job: SessionAutomationJob | null;
  deleting: boolean;
  onOpenChange: (open: boolean) => void;
  onConfirm: (job: SessionAutomationJob) => void | Promise<void>;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  return (
    <Dialog open={Boolean(job)} onOpenChange={onOpenChange}>
      <DialogContent className="w-[min(calc(100vw-2rem),26rem)] rounded-[26px]">
        <DialogHeader>
          <DialogTitle>{tx("settings.automations.deleteTitle", "Delete automation")}</DialogTitle>
          <DialogDescription>
            {tx(
              "settings.automations.deleteDescription",
              "This removes {{name}} from automations. Past chat messages stay in the session.",
              { name: job?.name || job?.id || "" },
            )}
          </DialogDescription>
        </DialogHeader>
        <DialogFooter>
          <Button
            type="button"
            variant="ghost"
            onClick={() => onOpenChange(false)}
            disabled={deleting}
            className="rounded-full"
          >
            {tx("settings.automations.cancel", "Cancel")}
          </Button>
          <Button
            type="button"
            variant="destructive"
            onClick={() => job && void onConfirm(job)}
            disabled={!job || deleting}
            className="rounded-full"
          >
            {deleting ? <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden /> : null}
            {tx("settings.automations.delete", "Delete")}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}

function NanobotFeatureInstallDialog({
  feature,
  installing,
  onOpenChange,
  onConfirm,
}: {
  feature: NanobotFeatureInfo | null;
  installing: boolean;
  onOpenChange: (open: boolean) => void;
  onConfirm: (feature: NanobotFeatureInfo) => void | Promise<void>;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string, values?: Record<string, unknown>) =>
    t(key, { defaultValue: fallback, ...(values ?? {}) });
  const name = feature?.display_name || feature?.name || "";
  return (
    <Dialog open={Boolean(feature)} onOpenChange={onOpenChange}>
      <DialogContent
        showCloseButton={false}
        className="w-[min(calc(100vw-2rem),24rem)] gap-0 rounded-[28px] border border-white/70 bg-card/95 p-5 text-center shadow-[0_24px_80px_rgba(15,23,42,0.20)] backdrop-blur-xl sm:rounded-[28px]"
      >
        <DialogHeader className="items-center space-y-0 text-center">
          <DialogTitle className="text-center text-[20px] font-semibold leading-tight tracking-[-0.02em] text-foreground">
            {tx("settings.nanobotFeatures.installConfirmTitle", "Install support for {{name}}?", { name })}
          </DialogTitle>
          <DialogDescription className="mt-3 max-w-[20rem] text-center text-[14px] leading-6 text-muted-foreground">
            {tx(
              "settings.nanobotFeatures.installConfirmDescription",
              "nanobot will add what {{name}} needs, then turn it on. Continue?",
              { name },
            )}
          </DialogDescription>
        </DialogHeader>
        <DialogFooter className="mt-7 !grid grid-cols-1 gap-3 space-x-0 sm:grid-cols-2 sm:space-x-0">
          <Button
            type="button"
            variant="ghost"
            onClick={() => onOpenChange(false)}
            disabled={installing}
            className="h-11 w-full min-w-0 rounded-full bg-muted/70 px-5 text-[15px] font-semibold text-foreground shadow-none hover:bg-muted"
          >
            {tx("settings.automations.cancel", "Cancel")}
          </Button>
          <Button
            type="button"
            onClick={() => feature && void onConfirm(feature)}
            disabled={!feature || installing}
            className="h-11 w-full min-w-0 !whitespace-normal rounded-full px-5 text-center text-[15px] font-semibold"
          >
            {installing ? <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden /> : null}
            {tx("settings.nanobotFeatures.installConfirmAction", "Install and enable")}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}

function isLocalTriggerAutomation(job: SessionAutomationJob | null): boolean {
  if (!job) return false;
  return job.kind === "local_trigger"
    || job.payload.kind === "local_trigger"
    || job.schedule.kind === "local";
}

function automationTriggerCommand(job: SessionAutomationJob): string {
  return job.trigger?.command || job.payload.command || job.payload.message || "";
}

function automationSummary(
  job: SessionAutomationJob,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string {
  if (isLocalTriggerAutomation(job)) {
    return automationTriggerCommand(job) || tx("settings.automations.localTrigger", "Local trigger");
  }
  return job.payload.message || tx("settings.automations.systemTask", "System-managed automation");
}

function automationDetailText(
  job: SessionAutomationJob,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string {
  return automationSummary(job, tx);
}

function automationNeedsAttention(job: SessionAutomationJob): boolean {
  return job.state.last_status === "error";
}

function automationStatusKey(
  job: SessionAutomationJob,
): "active" | "running" | "paused" | "failed" | "system" | "completed" | "idle" {
  if (job.protected) return "system";
  if (job.state.pending) return "running";
  if (!job.enabled) return "paused";
  if (job.state.last_status === "error") return "failed";
  if (isLocalTriggerAutomation(job)) return "active";
  if (job.delete_after_run && !job.state.next_run_at_ms && job.state.last_status === "ok") {
    return "completed";
  }
  if (!job.state.next_run_at_ms) return "idle";
  return "active";
}

function sortAutomationJobs(jobs: SessionAutomationJob[], sort: AutomationSort): SessionAutomationJob[] {
  const byName = (left: SessionAutomationJob, right: SessionAutomationJob) =>
    (left.name || left.id).localeCompare(right.name || right.id);
  return [...jobs].sort((left, right) => {
    if (sort === "name") return byName(left, right);
    if (sort === "last") {
      return (right.state.last_run_at_ms ?? 0) - (left.state.last_run_at_ms ?? 0) || byName(left, right);
    }
    if (sort === "updated") {
      return (right.updated_at_ms ?? 0) - (left.updated_at_ms ?? 0) || byName(left, right);
    }
    const leftNext = left.state.next_run_at_ms ?? Number.MAX_SAFE_INTEGER;
    const rightNext = right.state.next_run_at_ms ?? Number.MAX_SAFE_INTEGER;
    return leftNext - rightNext || byName(left, right);
  });
}

function automationDraftFromJob(job: SessionAutomationJob | null): AutomationEditDraft {
  const every = automationIntervalDraft(job?.schedule.every_ms ?? 3_600_000);
  const scheduleKind = job?.schedule.kind === "at" || job?.schedule.kind === "cron"
    ? job.schedule.kind
    : "every";
  return {
    name: job?.name ?? "",
    message: job?.payload.message ?? "",
    scheduleKind,
    everyValue: every.value,
    everyUnit: every.unit,
    cronExpr: job?.schedule.expr ?? "0 9 * * *",
    tz: job?.schedule.tz ?? "",
    atLocal: formatLocalDateTimeInput(job?.schedule.at_ms ?? Date.now() + 3_600_000),
  };
}

function automationIntervalDraft(ms: number): { value: string; unit: AutomationEveryUnit } {
  for (const unit of [...AUTOMATION_EVERY_UNITS].reverse()) {
    if (ms >= unit.ms && ms % unit.ms === 0) {
      return { value: String(ms / unit.ms), unit: unit.value };
    }
  }
  return { value: String(Math.max(1, Math.round(ms / 60_000))), unit: "minute" };
}

function formatLocalDateTimeInput(ms: number): string {
  const date = new Date(ms);
  if (!Number.isFinite(date.getTime())) return "";
  const local = new Date(ms - date.getTimezoneOffset() * 60_000);
  return local.toISOString().slice(0, 16);
}

function automationEditDraftError(
  draft: AutomationEditDraft,
  job: SessionAutomationJob | null,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string | null {
  if (!draft.name.trim()) return tx("settings.automations.validation.nameRequired", "Name is required.");
  if (isLocalTriggerAutomation(job)) return null;
  if (!draft.message.trim()) {
    return tx("settings.automations.validation.messageRequired", "Message is required.");
  }
  if (draft.scheduleKind === "every") {
    const value = Number(draft.everyValue);
    if (!Number.isInteger(value) || value <= 0) {
      return tx("settings.automations.validation.intervalRequired", "Interval must be a positive number.");
    }
  }
  if (draft.scheduleKind === "cron" && !draft.cronExpr.trim()) {
    return tx("settings.automations.validation.cronRequired", "Cron expression is required.");
  }
  if (draft.scheduleKind === "at") {
    const atMs = new Date(draft.atLocal).getTime();
    if (!Number.isFinite(atMs)) {
      return tx("settings.automations.validation.timeRequired", "Run time is required.");
    }
    if (atMs <= Date.now() && automationScheduleChanged(draft, job)) {
      return tx("settings.automations.validation.futureRequired", "Run time must be in the future.");
    }
  }
  return null;
}

function automationUpdatePayloadFromDraft(
  draft: AutomationEditDraft,
  job: SessionAutomationJob | null,
): AutomationUpdatePayload | string {
  const name = draft.name.trim();
  if (isLocalTriggerAutomation(job)) {
    if (!name) return "invalid";
    return { name };
  }
  const message = draft.message.trim();
  if (!name || !message) return "invalid";
  const payload: AutomationUpdatePayload = { name, message };
  const schedule = automationSchedulePayloadFromDraft(draft);
  if (typeof schedule === "string") return schedule;
  if (automationScheduleChanged(draft, job, schedule)) {
    payload.schedule = schedule;
  }
  return payload;
}

function automationSchedulePayloadFromDraft(draft: AutomationEditDraft): AutomationScheduleUpdate | string {
  if (draft.scheduleKind === "every") {
    const unit = AUTOMATION_EVERY_UNITS.find((candidate) => candidate.value === draft.everyUnit);
    const value = Number(draft.everyValue);
    if (!unit || !Number.isInteger(value) || value <= 0) return "invalid";
    return { kind: "every", every_ms: value * unit.ms };
  } else if (draft.scheduleKind === "cron") {
    const expr = draft.cronExpr.trim();
    if (!expr) return "invalid";
    return { kind: "cron", expr, ...(draft.tz.trim() ? { tz: draft.tz.trim() } : {}) };
  } else {
    const atMs = new Date(draft.atLocal).getTime();
    if (!Number.isFinite(atMs)) return "invalid";
    return { kind: "at", at_ms: atMs };
  }
}

function automationScheduleChanged(
  draft: AutomationEditDraft,
  job: SessionAutomationJob | null,
  schedule: AutomationScheduleUpdate | string = automationSchedulePayloadFromDraft(draft),
): boolean {
  if (!job || typeof schedule === "string") return true;
  if (schedule.kind !== job.schedule.kind) return true;
  if (schedule.kind === "every") return schedule.every_ms !== job.schedule.every_ms;
  if (schedule.kind === "cron") {
    return schedule.expr !== (job.schedule.expr ?? "") || (schedule.tz ?? null) !== (job.schedule.tz ?? null);
  }
  return draft.atLocal !== formatLocalDateTimeInput(job.schedule.at_ms ?? NaN);
}

type AutomationSearchField = "id" | "name" | "message" | "chat" | "cron" | "schedule" | "status";

interface AutomationSearchToken {
  field: AutomationSearchField | null;
  value: string;
}

const AUTOMATION_SEARCH_FIELDS = new Set<AutomationSearchField>([
  "id",
  "name",
  "message",
  "chat",
  "cron",
  "schedule",
  "status",
]);

const HOST_AUTOMATION_CHANNEL_LABELS: Record<string, string> = {
  api: "API",
  cli: "CLI",
};

function parseAutomationSearchQuery(query: string): AutomationSearchToken[] {
  return (query.match(/[^\s:]+:"[^"]+"|"[^"]+"|\S+/g) ?? [])
    .map((rawPart): AutomationSearchToken | null => {
      const part = trimAutomationSearchValue(rawPart);
      if (!part) return null;
      const fieldMatch = part.match(/^([A-Za-z]+):(.*)$/);
      if (!fieldMatch) return { field: null, value: part.toLowerCase() };
      const field = fieldMatch[1].toLowerCase() as AutomationSearchField;
      const value = trimAutomationSearchValue(fieldMatch[2]).toLowerCase();
      if (!value) return null;
      return AUTOMATION_SEARCH_FIELDS.has(field)
        ? { field, value }
        : { field: null, value: part.toLowerCase() };
    })
    .filter((token): token is AutomationSearchToken => Boolean(token));
}

function trimAutomationSearchValue(value: string): string {
  return value.trim().replace(/^"|"$/g, "").trim();
}

function automationMatchesSearch(job: SessionAutomationJob, tokens: AutomationSearchToken[]): boolean {
  return tokens.every((token) => automationSearchText(job, token.field).includes(token.value));
}

function automationSearchText(job: SessionAutomationJob, field: AutomationSearchField | null = null): string {
  return automationSearchParts(job, field)
    .filter(Boolean)
    .join(" ")
    .toLowerCase();
}

function automationSearchParts(
  job: SessionAutomationJob,
  field: AutomationSearchField | null,
): Array<string | number | null | undefined> {
  const originParts = automationOriginSearchParts(job);
  const scheduleParts = automationScheduleSearchParts(job);
  if (field === "id") return [job.id];
  if (field === "name") return [job.name, job.id];
  if (field === "message") return [job.payload.message, job.payload.command, job.trigger?.command];
  if (field === "chat") return originParts;
  if (field === "cron" || field === "schedule") return scheduleParts;
  if (field === "status") return [automationStatusKey(job), job.enabled ? "enabled" : "disabled"];
  return [
    job.id,
    job.name,
    job.payload.message,
    job.payload.command,
    job.trigger?.command,
    isLocalTriggerAutomation(job) ? "trigger local" : null,
    ...scheduleParts,
    automationStatusKey(job),
    ...originParts,
  ];
}

function automationOriginSearchParts(job: SessionAutomationJob): Array<string | null | undefined> {
  const origin = job.origin;
  if (!origin) return [];
  const channel = origin.channel.trim().toLowerCase();
  return [
    origin.session_key,
    origin.title,
    origin.preview,
    origin.channel,
    automationChannelDisplayName(channel),
  ];
}

function automationScheduleSearchParts(job: SessionAutomationJob): Array<string | number | null | undefined> {
  const schedule = job.schedule;
  const parts: Array<string | number | null | undefined> = [
    schedule.kind,
    schedule.expr,
    schedule.tz,
    schedule.every_ms,
    schedule.at_ms,
  ];
  if (schedule.kind === "cron" && schedule.expr) {
    parts.push(...automationCronSearchParts(schedule.expr));
  }
  return parts;
}

function automationCronSearchParts(expr: string): string[] {
  const parts = expr.trim().split(/\s+/);
  if (parts.length !== 5) return [];
  const [minute, hour, dayOfMonth, month, dayOfWeek] = parts;
  const everyDay = dayOfMonth === "*" && month === "*" && dayOfWeek === "*";
  const numericMinute = cronNumericToken(minute, 59);
  const numericHour = cronNumericToken(hour, 23);
  if (numericMinute === null) return [];
  const paddedMinute = String(numericMinute).padStart(2, "0");

  if (numericHour !== null) {
    const time = `${String(numericHour).padStart(2, "0")}:${paddedMinute}`;
    return [time, `:${paddedMinute}`];
  }

  if (everyDay && hour === "*") {
    return [`:${paddedMinute}`, `hourly at :${paddedMinute}`];
  }

  const range = /^(\d{1,2})-(\d{1,2})$/.exec(hour);
  if (!everyDay || !range) return [];
  const start = Number(range[1]);
  const end = Number(range[2]);
  if (start > 23 || end > 23) return [];
  const paddedRange = `${String(start).padStart(2, "0")}-${String(end).padStart(2, "0")}`;
  const rawRange = `${start}-${end}`;
  return [
    paddedRange,
    rawRange,
    `:${paddedMinute}`,
    `${paddedRange} at :${paddedMinute}`,
    `hourly ${paddedRange} at :${paddedMinute}`,
  ];
}

function automationMatchesFilter(job: SessionAutomationJob, filter: AutomationFilter): boolean {
  const status = automationStatusKey(job);
  if (filter === "active") return status === "active" || status === "running";
  if (filter === "paused") return status === "paused";
  if (filter === "failed") return automationNeedsAttention(job);
  if (filter === "system") return Boolean(job.protected);
  return true;
}

const AUTOMATION_FILTER_TONES: Partial<
  Record<AutomationFilter, { text: string; selectedText: string; count: string }>
> = {
  active: {
    text: "text-emerald-600 dark:text-emerald-400",
    selectedText: "text-emerald-700 dark:text-emerald-300",
    count: "bg-emerald-500/10 text-emerald-700 dark:text-emerald-300",
  },
  paused: {
    text: "text-amber-600 dark:text-amber-400",
    selectedText: "text-amber-700 dark:text-amber-300",
    count: "bg-amber-500/10 text-amber-700 dark:text-amber-300",
  },
  failed: {
    text: "text-rose-600 dark:text-rose-400",
    selectedText: "text-rose-700 dark:text-rose-300",
    count: "bg-rose-500/10 text-rose-700 dark:text-rose-300",
  },
  system: {
    text: "text-sky-600 dark:text-sky-400",
    selectedText: "text-sky-700 dark:text-sky-300",
    count: "bg-sky-500/10 text-sky-700 dark:text-sky-300",
  },
};

function automationFilterToneClass(value: AutomationFilter, count: number, selected: boolean): string {
  const tone = AUTOMATION_FILTER_TONES[value];
  if (count <= 0 || !tone) return "";
  return selected ? tone.selectedText : tone.text;
}

function automationFilterCountClass(value: AutomationFilter, count: number): string {
  const tone = AUTOMATION_FILTER_TONES[value];
  return count > 0 && tone ? tone.count : "";
}

function automationStatus(
  job: SessionAutomationJob,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): { label: string; tone: "neutral" | "success" | "warning" } {
  const status = automationStatusKey(job);
  if (status === "system") return { label: tx("settings.automations.status.system", "System"), tone: "neutral" };
  if (status === "running") {
    return { label: tx("settings.automations.status.running", "Running now"), tone: "warning" };
  }
  if (status === "paused") return { label: tx("settings.automations.status.paused", "Paused"), tone: "neutral" };
  if (status === "failed") {
    return { label: tx("settings.automations.status.failed", "Failed"), tone: "warning" };
  }
  if (status === "completed") {
    return { label: tx("settings.automations.status.completed", "Completed"), tone: "neutral" };
  }
  if (status === "idle") {
    return { label: tx("settings.automations.status.noSchedule", "No schedule"), tone: "neutral" };
  }
  return { label: tx("settings.automations.status.active", "Active"), tone: "success" };
}

function automationOriginLabel(
  job: SessionAutomationJob,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string {
  if (job.protected) return tx("settings.automations.origin.system", "System");
  const origin = job.origin;
  if (!origin) return tx("settings.automations.origin.unknown", "No linked chat");
  if (origin.channel !== "websocket") return automationChannelLabel(origin.channel, tx);
  return origin.title || origin.preview || origin.session_key || automationChannelLabel(origin.channel, tx);
}

function automationChannelLabel(
  channel: string,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string {
  const key = channel.trim().toLowerCase();
  const displayName = automationChannelDisplayName(key);
  return displayName
    ? tx(`settings.automations.channels.${key}`, displayName)
    : channel;
}

function automationChannelDisplayName(channel: string): string | undefined {
  const key = channel.trim().toLowerCase();
  return channelUiPresentation(key)?.displayName ?? HOST_AUTOMATION_CHANNEL_LABELS[key];
}

function formatAutomationSchedule(
  job: SessionAutomationJob,
  locale: string,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string {
  if (job.schedule.kind === "at" && job.schedule.at_ms) {
    return tx("settings.automations.schedule.at", "At {{time}}", {
      time: fmtDateTime(job.schedule.at_ms, locale),
    });
  }
  if (job.schedule.kind === "every" && job.schedule.every_ms) {
    return tx("settings.automations.schedule.every", "Every {{duration}}", {
      duration: formatAutomationInterval(job.schedule.every_ms, locale),
    });
  }
  if (job.schedule.kind === "cron" && job.schedule.expr) {
    const summary = formatCronScheduleSummary(job.schedule.expr, tx);
    if (summary) {
      return job.schedule.tz
        ? tx("settings.automations.schedule.withTz", "{{summary}} · {{tz}}", {
            summary,
            tz: job.schedule.tz,
          })
        : summary;
    }
    return job.schedule.tz
      ? tx("settings.automations.schedule.cronWithTz", "Cron {{expr}} · {{tz}}", {
          expr: job.schedule.expr,
          tz: job.schedule.tz,
        })
      : tx("settings.automations.schedule.cron", "Cron {{expr}}", { expr: job.schedule.expr });
  }
  if (isLocalTriggerAutomation(job)) {
    return tx("settings.automations.schedule.local", "Local trigger");
  }
  return tx("settings.automations.schedule.custom", "Custom schedule");
}

function formatCronScheduleSummary(
  expr: string,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string | null {
  const parts = expr.trim().split(/\s+/);
  if (parts.length !== 5) return null;
  const [minute, hour, dayOfMonth, month, dayOfWeek] = parts;
  const numericMinute = cronNumericToken(minute, 59);
  const numericHour = cronNumericToken(hour, 23);
  const everyDay = dayOfMonth === "*" && month === "*" && dayOfWeek === "*";
  const workdays = dayOfMonth === "*" && month === "*" && ["1-5", "MON-FRI", "mon-fri"].includes(dayOfWeek);

  if (numericMinute !== null && numericHour !== null) {
    const time = `${String(numericHour).padStart(2, "0")}:${String(numericMinute).padStart(2, "0")}`;
    if (everyDay) return tx("settings.automations.schedule.dailyAt", "Daily at {{time}}", { time });
    if (workdays) return tx("settings.automations.schedule.weekdaysAt", "Weekdays at {{time}}", { time });
  }

  if (everyDay && numericMinute !== null && hour === "*") {
    return tx("settings.automations.schedule.hourlyAt", "Hourly at :{{minute}}", {
      minute: String(numericMinute).padStart(2, "0"),
    });
  }

  const range = /^(\d{1,2})-(\d{1,2})$/.exec(hour);
  if (everyDay && numericMinute !== null && range) {
    const start = Number(range[1]);
    const end = Number(range[2]);
    if (start > 23 || end > 23) return null;
    return tx("settings.automations.schedule.hourlyWindow", "Hourly {{start}}-{{end}} at :{{minute}}", {
      start: String(start).padStart(2, "0"),
      end: String(end).padStart(2, "0"),
      minute: String(numericMinute).padStart(2, "0"),
    });
  }

  return null;
}

function cronNumericToken(value: string, max: number): number | null {
  if (!/^\d{1,2}$/.test(value)) return null;
  const parsed = Number(value);
  return parsed <= max ? parsed : null;
}

function formatAutomationNext(
  job: SessionAutomationJob,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string {
  if (!job.enabled) return tx("settings.automations.next.paused", "Paused");
  if (job.state.pending) return tx("settings.automations.next.pending", "Running now");
  if (isLocalTriggerAutomation(job)) {
    return tx("settings.automations.next.local", "Waiting for trigger");
  }
  if (!job.state.next_run_at_ms) return tx("settings.automations.next.none", "No next run");
  return relativeTime(job.state.next_run_at_ms);
}

function formatAutomationNextTitle(
  job: SessionAutomationJob,
  locale: string,
  tx: (key: string, fallback: string, values?: Record<string, unknown>) => string,
): string {
  if (!job.state.next_run_at_ms) return formatAutomationNext(job, tx);
  return fmtDateTime(job.state.next_run_at_ms, locale);
}

function automationStatusDotClass(job: SessionAutomationJob): string {
  const status = automationStatusKey(job);
  if (status === "active" || status === "running") return "bg-orange-500";
  if (status === "failed") return "bg-amber-500";
  return "bg-muted-foreground/45";
}

function formatAutomationUnit(
  value: number,
  unit: Intl.NumberFormatOptions["unit"],
  locale: string,
  maximumFractionDigits = 0,
): string {
  return new Intl.NumberFormat(locale, {
    style: "unit",
    unit,
    unitDisplay: "long",
    maximumFractionDigits,
  }).format(value);
}

function formatAutomationInterval(ms: number, locale: string): string {
  const units: Array<[Intl.NumberFormatOptions["unit"], number]> = [
    ["day", 86_400_000],
    ["hour", 3_600_000],
    ["minute", 60_000],
    ["second", 1000],
  ];
  for (const [unit, size] of units) {
    if (ms >= size && ms % size === 0) return formatAutomationUnit(ms / size, unit, locale);
  }
  const fallbackUnit = ms < 60_000 ? "second" : "minute";
  const fallbackSize = fallbackUnit === "second" ? 1000 : 60_000;
  return formatAutomationUnit(ms / fallbackSize, fallbackUnit, locale, 1);
}

function DismissibleStatusMessage({
  message,
  isError,
  onDismiss,
}: {
  message: string;
  isError: boolean;
  onDismiss: () => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  return (
    <div
      className={cn(
        "flex items-center justify-between gap-3 rounded-[12px] border py-2.5 pl-4 pr-2 text-[13px]",
        isError
          ? "border-destructive/20 bg-destructive/5 text-destructive"
          : "border-border/55 bg-muted/35 text-muted-foreground",
      )}
    >
      <span className="min-w-0">{message}</span>
      <button
        type="button"
        aria-label={tx("settings.actions.dismiss", "Dismiss")}
        title={tx("settings.actions.dismiss", "Dismiss")}
        onClick={onDismiss}
        className={cn(
          "flex h-8 w-8 shrink-0 items-center justify-center rounded-full transition-colors",
          isError
            ? "text-destructive/70 hover:bg-destructive/10 hover:text-destructive"
            : "text-muted-foreground/70 hover:bg-muted hover:text-foreground",
        )}
      >
        <X className="h-3.5 w-3.5" aria-hidden />
      </button>
    </div>
  );
}

function RestartRequiredNotice({
  message,
  onRestart,
  isRestarting,
}: {
  message: string;
  onRestart?: () => void;
  isRestarting?: boolean;
}) {
  const { t } = useTranslation();
  return (
    <div className="flex flex-col gap-3 rounded-[12px] border border-amber-500/20 bg-amber-500/8 px-4 py-3 text-[12.5px] text-amber-800 dark:text-amber-200 sm:flex-row sm:items-center sm:justify-between">
      <span>{message}</span>
      {onRestart ? (
        <Button
          type="button"
          size="sm"
          variant="outline"
          onClick={onRestart}
          disabled={isRestarting}
          className="h-8 rounded-full bg-background/80 px-3 text-[12px] font-semibold"
        >
          {isRestarting ? (
            <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
          ) : (
            <RotateCcw className="mr-1.5 h-3.5 w-3.5" aria-hidden />
          )}
          {isRestarting ? t("app.system.restarting") : t("app.system.restart")}
        </Button>
      ) : null}
    </div>
  );
}

function ChannelsSettings({
  token,
  nanobotFeatures,
  loading,
  query,
  actionKey,
  chatAppsDocsUrl,
  showBrandLogos,
  error,
  requiresRestartPending,
  onQueryChange,
  onAction,
  onFeaturesUpdate,
  onDismissStatus,
  onRestart,
  isRestarting,
}: {
  token: string;
  nanobotFeatures: NanobotFeaturesPayload | null;
  loading: boolean;
  query: string;
  actionKey: string | null;
  chatAppsDocsUrl?: string;
  showBrandLogos: boolean;
  error: string | null;
  requiresRestartPending: boolean;
  onQueryChange: (value: string) => void;
  onAction: (action: "enable" | "disable", name: string) => void;
  onFeaturesUpdate: (payload: NanobotFeaturesPayload) => void;
  onDismissStatus: () => void;
  onRestart?: () => void;
  isRestarting?: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const normalizedQuery = query.trim().toLowerCase();
  const [filter, setFilter] = useState<ChannelFilter>("all");
  const splitLayout = useMediaQuery("(min-width: 1280px)");
  const containerRef = useRef<HTMLDivElement>(null);
  const compactDetailTopRef = useRef<HTMLButtonElement>(null);
  const [compactDetailOpen, setCompactDetailOpen] = useState(false);
  const allChannels = (nanobotFeatures?.features ?? [])
    .filter((feature) => feature.type === "channel")
    .filter((feature) => feature.settings_visible !== false)
    .filter((feature) => !normalizedQuery || channelSearchText(feature, t).includes(normalizedQuery))
    .sort((left, right) => {
      const rank = Number(!left.ready) - Number(!right.ready);
      return rank || localizedChannelDisplayName(left, t).localeCompare(
        localizedChannelDisplayName(right, t),
      );
    });
  const channels = allChannels.filter((feature) => channelMatchesFilter(feature, filter));
  const [selectedChannelName, setSelectedChannelName] = useState<string | null>(null);
  const selectedChannel =
    channels.find((feature) => feature.name === selectedChannelName) ?? channels[0] ?? null;
  const enabledCount = allChannels.filter(channelIsRunning).length;
  const offCount = Math.max(0, allChannels.length - enabledCount);
  const filterOptions: Array<{ value: ChannelFilter; label: string; count: number }> = [
    { value: "all", label: tx("settings.channels.filterAll", "All"), count: allChannels.length },
    { value: "on", label: tx("settings.channels.filterOn", "On"), count: enabledCount },
    { value: "off", label: tx("settings.channels.filterOff", "Off"), count: offCount },
  ];
  const statusMessage = error;
  const statusIsError = true;

  useEffect(() => {
    if (!channels.length) {
      if (selectedChannelName !== null) setSelectedChannelName(null);
      setCompactDetailOpen(false);
      return;
    }
    if (!selectedChannelName || !channels.some((feature) => feature.name === selectedChannelName)) {
      setSelectedChannelName(channels[0].name);
      setCompactDetailOpen(false);
    }
  }, [channels, selectedChannelName]);

  useEffect(() => {
    if (splitLayout) return;
    const resetScroll = () => {
      let node = containerRef.current?.parentElement ?? null;
      while (node) {
        node.scrollTop = 0;
        node = node.parentElement;
      }
      if (compactDetailOpen) {
        compactDetailTopRef.current?.scrollIntoView?.({ block: "start" });
      }
    };
    resetScroll();
    const frame = window.requestAnimationFrame(resetScroll);
    return () => window.cancelAnimationFrame(frame);
  }, [compactDetailOpen, selectedChannelName, splitLayout]);

  const openChannel = (name: string) => {
    setSelectedChannelName(name);
    if (!splitLayout) setCompactDetailOpen(true);
  };

  const setupPanel = selectedChannel ? (
    <ChannelSetupPanel
      token={token}
      feature={selectedChannel}
      actionKey={actionKey}
      chatAppsDocsUrl={chatAppsDocsUrl}
      showBrandLogos={showBrandLogos}
      onAction={onAction}
      onFeaturesUpdate={onFeaturesUpdate}
    />
  ) : null;
  const showingCompactDetail = !splitLayout && compactDetailOpen && selectedChannel !== null;

  return (
    <div
      ref={containerRef}
      className="flex min-h-full flex-1 flex-col xl:min-h-0 xl:overflow-hidden"
    >
      {!showingCompactDetail ? (
        <section className="shrink-0 space-y-4">
          <div className="flex flex-col gap-3 sm:flex-row sm:items-end sm:justify-between">
            <p className="max-w-[680px] text-[13px] leading-5 text-muted-foreground">
              {tx(
                "settings.channels.description",
                "Connect chat apps, email, and WebUI to nanobot.",
              )}
            </p>
            <div className="flex flex-wrap gap-2 text-[12px] font-medium text-muted-foreground">
              <span className="rounded-full bg-muted/70 px-2.5 py-1">
                {t("settings.channels.caption", {
                  enabled: enabledCount,
                  total: allChannels.length,
                  defaultValue: "{{enabled}} enabled · {{total}} channels",
                })}
              </span>
            </div>
          </div>
          <div className="flex flex-col gap-3 lg:flex-row lg:items-center">
            <div className="relative min-w-0 flex-1">
              <Search className="pointer-events-none absolute left-4 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" aria-hidden />
              <Input
                value={query}
                onChange={(event) => onQueryChange(event.target.value)}
                placeholder={tx("settings.channels.searchPlaceholder", "Search channels")}
                className={cn(
                  "h-12 rounded-[14px] pl-11 text-[15px]",
                  SETTINGS_SEARCH_INPUT_CLASS,
                )}
              />
            </div>
            <div className="flex shrink-0 flex-wrap gap-1.5 rounded-[14px] bg-muted/55 p-1">
              {filterOptions.map((option) => (
                <button
                  key={option.value}
                  type="button"
                  onClick={() => setFilter(option.value)}
                  className={cn(
                    "rounded-[11px] px-3 py-1.5 text-[12px] font-medium transition-colors",
                    filter === option.value
                      ? "bg-background text-foreground"
                      : "text-muted-foreground hover:text-foreground",
                  )}
                >
                  {option.label}
                  <span className="ml-1 text-[11px] text-muted-foreground">{option.count}</span>
                </button>
              ))}
            </div>
          </div>
        </section>
      ) : null}

      {statusMessage ? (
        <div className="mt-3 shrink-0">
          <DismissibleStatusMessage
            message={statusMessage}
            isError={statusIsError}
            onDismiss={onDismissStatus}
          />
        </div>
      ) : null}

      {requiresRestartPending ? (
        <div className="mt-3 shrink-0">
          <RestartRequiredNotice
            message={tx("settings.channels.restartRequired", "Restart nanobot to apply updated channel support.")}
            onRestart={onRestart}
            isRestarting={isRestarting}
          />
        </div>
      ) : null}

      <section
        className={cn(
          "flex flex-1 flex-col",
          showingCompactDetail ? "mt-1" : "mt-5",
          splitLayout && "min-h-0 overflow-hidden",
        )}
      >
        {loading && !nanobotFeatures ? (
          <div className="flex h-36 items-center justify-center text-sm text-muted-foreground">
            <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden />
            {tx("settings.channels.loading", "Loading Channels...")}
          </div>
        ) : channels.length ? splitLayout ? (
          <div className="grid min-h-0 flex-1 grid-cols-[minmax(0,1fr)_minmax(400px,460px)] gap-6 overflow-hidden">
            <div className="min-h-0 space-y-1 overflow-y-auto overscroll-contain pr-1">
              {channels.map((feature) => (
                <ChannelCatalogRow
                  key={feature.name}
                  feature={feature}
                  selected={selectedChannel?.name === feature.name}
                  showBrandLogos={showBrandLogos}
                  onSelect={() => openChannel(feature.name)}
                />
              ))}
            </div>
            <div className="min-h-0 overflow-y-auto overscroll-contain pr-1">{setupPanel}</div>
          </div>
        ) : showingCompactDetail ? (
          <div className="pb-6">
            <button
              ref={compactDetailTopRef}
              type="button"
              onClick={() => setCompactDetailOpen(false)}
              className="mb-4 inline-flex h-9 items-center gap-1.5 rounded-full px-2.5 text-[13px] font-medium text-muted-foreground transition-colors hover:bg-muted/70 hover:text-foreground"
            >
              <ChevronLeft className="h-4 w-4" aria-hidden />
              {tx("settings.channels.backToChannels", "All channels")}
            </button>
            {setupPanel}
          </div>
        ) : (
          <div className="space-y-1 pb-6">
            {channels.map((feature) => (
              <ChannelCatalogRow
                key={feature.name}
                feature={feature}
                selected={false}
                showBrandLogos={showBrandLogos}
                onSelect={() => openChannel(feature.name)}
              />
            ))}
          </div>
        ) : (
          <div className="min-h-0 flex-1 px-3 py-12 text-center text-sm text-muted-foreground">
            {tx("settings.channels.empty", "No channels match this filter.")}
          </div>
        )}
      </section>

      <div className={cn("shrink-0 pt-2", showingCompactDetail && "hidden")}>
        <ThirdPartyBrandNotice />
      </div>
    </div>
  );
}

function AppsCatalogSettings({
  cliApps,
  mcpPresets,
  cliAppsLoading,
  mcpPresetsLoading,
  query,
  filter,
  cliActionKey,
  mcpActionKey,
  cliMessage,
  cliError,
  cliFocusName,
  mcpMessage,
  mcpError,
  mcpFieldValues,
  customMcpForm,
  mcpConfigImport,
  showBrandLogos,
  requiresRestartPending,
  onQueryChange,
  onFilterChange,
  onCliAction,
  onMcpAction,
  onDismissStatus,
  onBackToChat,
  onMcpFieldChange,
  onCustomMcpFormChange,
  onMcpConfigImportChange,
  onSaveCustomMcp,
  onImportMcpConfig,
  onMcpToolsChange,
  onRestart,
  isRestarting,
}: {
  cliApps: CliAppsPayload | null;
  mcpPresets: McpPresetsPayload | null;
  cliAppsLoading: boolean;
  mcpPresetsLoading: boolean;
  query: string;
  filter: AppsKindFilter;
  cliActionKey: string | null;
  mcpActionKey: string | null;
  cliMessage: string | null;
  cliError: string | null;
  cliFocusName: string | null;
  mcpMessage: string | null;
  mcpError: string | null;
  mcpFieldValues: Record<string, Record<string, string>>;
  customMcpForm: CustomMcpForm;
  mcpConfigImport: string;
  showBrandLogos: boolean;
  requiresRestartPending: boolean;
  onQueryChange: (value: string) => void;
  onFilterChange: (value: AppsKindFilter) => void;
  onCliAction: (action: "install" | "update" | "uninstall" | "test", name: string) => void;
  onMcpAction: (action: "enable" | "remove" | "test", name: string, values?: Record<string, string>) => void;
  onDismissStatus: () => void;
  onBackToChat: () => void;
  onMcpFieldChange: (presetName: string, fieldName: string, value: string) => void;
  onCustomMcpFormChange: Dispatch<SetStateAction<CustomMcpForm>>;
  onMcpConfigImportChange: (value: string) => void;
  onSaveCustomMcp: () => void;
  onImportMcpConfig: () => void;
  onMcpToolsChange: (name: string, enabledTools: string[]) => void;
  onRestart?: () => void;
  isRestarting?: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const filterOptions = [
    { value: "ready", label: tx("settings.apps.filterAll", "Ready") },
    { value: "cli", label: tx("settings.apps.filterCli", "Apps") },
    { value: "mcp", label: tx("settings.apps.filterMcp", "Integrations") },
  ];
  const normalizedQuery = query.trim().toLowerCase();
  const items: AppsCatalogItem[] = [
    ...(cliApps?.apps ?? []).map((app) => ({ id: `cli:${app.name}`, kind: "cli" as const, app })),
    ...(mcpPresets?.presets ?? []).map((preset) => ({
      id: `mcp:${preset.name}`,
      kind: "mcp" as const,
      preset,
    })),
  ]
    .filter((item) => {
      if (normalizedQuery) return appsSearchText(item).includes(normalizedQuery);
      return filter === "ready" ? appsReady(item) : item.kind === filter;
    })
    .sort((left, right) => {
      const rank = Number(!appsReady(left)) - Number(!appsReady(right));
      return rank || appsTitle(left).localeCompare(appsTitle(right));
    });
  const focusedApp = cliFocusName
    ? (cliApps?.apps ?? []).find((app) => app.name === cliFocusName && app.installed)
    : null;
  const loading =
    (cliAppsLoading || mcpPresetsLoading) &&
    !cliApps &&
    !mcpPresets;
  const statusMessage =
    cliError ||
    mcpError ||
    (!focusedApp ? cliMessage || mcpMessage : null);
  const statusIsError = Boolean(cliError || mcpError);
  const readyCount = (cliApps?.installed_count ?? 0) + (mcpPresets?.installed_count ?? 0);
  const caption = t("settings.apps.enabledSummary", {
    count: readyCount,
    defaultValue: "{{count}} ready",
  });

  return (
    <div className="space-y-7">
      <section className="space-y-4">
        <div className="flex flex-col gap-2 sm:flex-row sm:items-end sm:justify-between">
          <p className="max-w-[680px] text-[13px] leading-5 text-muted-foreground">
            {tx(
              "settings.apps.description",
              "Add tools to nanobot, then @ them in chat.",
            )}
          </p>
          <span className="text-[12px] font-medium text-muted-foreground">{caption}</span>
        </div>
        <div className="flex flex-col gap-3 lg:flex-row lg:items-center">
          <div className="relative flex-1">
            <Search className="pointer-events-none absolute left-4 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" aria-hidden />
            <Input
              value={query}
              onChange={(event) => onQueryChange(event.target.value)}
              placeholder={tx("settings.apps.searchPlaceholder", "Search Apps")}
              className={cn(
                "h-12 rounded-[14px] pl-11 text-[15px]",
                SETTINGS_SEARCH_INPUT_CLASS,
              )}
            />
          </div>
          <SegmentedControl
            value={filter}
            options={filterOptions}
            onChange={(value) => onFilterChange(value as AppsKindFilter)}
          />
        </div>
      </section>

      {statusMessage ? (
        <DismissibleStatusMessage
          message={statusMessage}
          isError={statusIsError}
          onDismiss={onDismissStatus}
        />
      ) : null}

      {focusedApp ? (
        <CliAppReadyPanel app={focusedApp} showBrandLogos={showBrandLogos} onBackToChat={onBackToChat} />
      ) : null}

      {requiresRestartPending ? (
        <RestartRequiredNotice
          message={tx("settings.apps.restartRequired", "Restart nanobot to apply updated apps and features.")}
          onRestart={onRestart}
          isRestarting={isRestarting}
        />
      ) : null}

      <section className="rounded-[22px] bg-settings-surface px-3 py-3 sm:px-4">
        <div className="flex items-center justify-between border-b border-border/45 pb-3">
          <SettingsSectionTitle>{tx("settings.apps.featured", "Tools")}</SettingsSectionTitle>
          <span className="rounded-full bg-muted px-2.5 py-1 text-[12px] font-medium text-muted-foreground">
            {items.length}
          </span>
        </div>
        {loading ? (
          <div className="flex h-36 items-center justify-center text-sm text-muted-foreground">
            <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden />
            {tx("settings.apps.loading", "Loading Apps...")}
          </div>
        ) : items.length ? (
          <div className="grid gap-x-10 gap-y-1 py-3 md:grid-cols-2">
            {items.map((item) =>
              item.kind === "cli" ? (
                <CliAppsCatalogRow
                  key={item.id}
                  app={item.app}
                  actionKey={cliActionKey}
                  showBrandLogos={showBrandLogos}
                  onAction={onCliAction}
                />
              ) : (
                <McpAppsCatalogRow
                  key={item.id}
                  preset={item.preset}
                  values={mcpFieldValues[item.preset.name] ?? {}}
                  actionKey={mcpActionKey}
                  showBrandLogos={showBrandLogos}
                  onFieldChange={onMcpFieldChange}
                  onAction={onMcpAction}
                  onToolsChange={onMcpToolsChange}
                />
              ),
            )}
          </div>
        ) : (
          <div className="px-3 py-12 text-center text-sm text-muted-foreground">
            {tx("settings.apps.empty", "No tools match this view.")}
          </div>
        )}
      </section>

      {filter === "mcp" ? (
        <McpCustomServerPanel
          form={customMcpForm}
          configImport={mcpConfigImport}
          actionKey={mcpActionKey}
          onFormChange={onCustomMcpFormChange}
          onConfigImportChange={onMcpConfigImportChange}
          onSave={onSaveCustomMcp}
          onImportConfig={onImportMcpConfig}
        />
      ) : null}

      <ThirdPartyBrandNotice />
    </div>
  );
}

function CliAppsCatalogRow({
  app,
  actionKey,
  showBrandLogos,
  onAction,
}: {
  app: CliAppInfo;
  actionKey: string | null;
  showBrandLogos: boolean;
  onAction: (action: "install" | "update" | "uninstall" | "test", name: string) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const installBusy = actionKey === `install:${app.name}`;
  const updateBusy = actionKey === `update:${app.name}`;
  const uninstallBusy = actionKey === `uninstall:${app.name}`;
  const testBusy = actionKey === `test:${app.name}`;
  const busy = installBusy || updateBusy || uninstallBusy || testBusy;
  const description = app.description || app.requires || app.entry_point || app.name;

  return (
    <article className="apps-catalog-row group flex min-w-0 items-center gap-3 rounded-[14px] px-3 py-3 transition-colors hover:bg-muted/45">
      <CliAppLogo app={app} showBrandLogos={showBrandLogos} />
      <div className="min-w-0 flex-1">
        <div className="flex min-w-0 items-baseline gap-2">
          <h3 className="truncate text-[14px] font-semibold leading-5 text-foreground">{app.display_name}</h3>
          <AppsTypeBadge>{tx("settings.apps.cliLabel", "App")}</AppsTypeBadge>
        </div>
        <p className="mt-0.5 truncate text-[12.5px] leading-5 text-muted-foreground">{description}</p>
      </div>
      <div className="flex shrink-0 items-center gap-1">
        {app.installed ? (
          <>
            <DropdownMenu>
              <DropdownMenuTrigger asChild>
                <AppsActionButton
                  ariaLabel={tx("settings.cliApps.statusInstalled", "CLI installed")}
                  busy={testBusy || updateBusy}
                  disabled={busy}
                  tone="installed"
                >
                  <Check className="h-4 w-4" aria-hidden />
                </AppsActionButton>
              </DropdownMenuTrigger>
              <DropdownMenuContent align="end">
                <DropdownMenuItem disabled={busy} onClick={() => onAction("test", app.name)}>
                  <PlayCircle className="mr-2 h-3.5 w-3.5" aria-hidden />
                  {tx("settings.cliApps.test", "Test CLI")}
                </DropdownMenuItem>
                <DropdownMenuItem disabled={busy} onClick={() => onAction("update", app.name)}>
                  <RotateCcw className="mr-2 h-3.5 w-3.5" aria-hidden />
                  {tx("settings.cliApps.update", "Update CLI")}
                </DropdownMenuItem>
                <DropdownMenuItem disabled={busy} onClick={() => onAction("uninstall", app.name)}>
                  <Trash2 className="mr-2 h-3.5 w-3.5" aria-hidden />
                  {tx("settings.cliApps.uninstall", "Uninstall CLI")}
                </DropdownMenuItem>
              </DropdownMenuContent>
            </DropdownMenu>
            <AppsActionButton
              ariaLabel={tx("settings.cliApps.uninstall", "Uninstall CLI")}
              busy={uninstallBusy}
              disabled={busy && !uninstallBusy}
              tone="danger"
              onClick={() => onAction("uninstall", app.name)}
            >
              <Trash2 className="h-4 w-4" aria-hidden />
            </AppsActionButton>
          </>
        ) : app.install_supported ? (
          <AppsActionButton
            ariaLabel={tx("settings.cliApps.install", "Install CLI")}
            busy={installBusy}
            onClick={() => onAction("install", app.name)}
          >
            <Plus className="h-4 w-4" aria-hidden />
          </AppsActionButton>
        ) : (
          <AppsActionButton ariaLabel={tx("settings.cliApps.unavailable", "Unavailable")} disabled>
            <Plus className="h-4 w-4" aria-hidden />
          </AppsActionButton>
        )}
      </div>
    </article>
  );
}

function McpAppsCatalogRow({
  preset,
  values,
  actionKey,
  showBrandLogos,
  onFieldChange,
  onAction,
  onToolsChange,
}: {
  preset: McpPresetInfo;
  values: Record<string, string>;
  actionKey: string | null;
  showBrandLogos: boolean;
  onFieldChange: (presetName: string, fieldName: string, value: string) => void;
  onAction: (action: "enable" | "remove" | "test", name: string, values?: Record<string, string>) => void;
  onToolsChange: (name: string, enabledTools: string[]) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const [setupOpen, setSetupOpen] = useState(false);
  const [toolsOpen, setToolsOpen] = useState(false);
  const enableBusy = actionKey === `enable:${preset.name}`;
  const removeBusy = actionKey === `remove:${preset.name}`;
  const testBusy = actionKey === `test:${preset.name}`;
  const toolsBusy = actionKey === `tools:${preset.name}`;
  const busy = enableBusy || removeBusy || testBusy || toolsBusy;
  const missingFields = preset.required_fields.filter((field) => field.required && !field.configured);
  const hasFields = preset.required_fields.length > 0;
  const needsSetupInput = missingFields.length > 0;
  const readyInstalled = preset.installed && preset.configured;
  const canEnable =
    preset.install_supported &&
    (missingFields.length === 0 || missingFields.every((field) => Boolean(values[field.name]?.trim())));
  const toolNames = preset.tool_names ?? [];
  const enabledTools = preset.enabled_tools ?? ["*"];
  const allowAllTools = enabledTools.includes("*");
  const enabledSet = new Set(allowAllTools ? toolNames : enabledTools);
  const description = preset.description || preset.note || preset.requires || preset.name;
  const statusLabel = mcpPresetStatusLabel(preset.status, tx);

  useEffect(() => {
    if (preset.configured || !preset.install_supported) setSetupOpen(false);
  }, [preset.configured, preset.install_supported]);

  const enableOrOpenSetup = () => {
    if (needsSetupInput || (preset.installed && !preset.configured && hasFields)) {
      setSetupOpen(true);
      return;
    }
    onAction("enable", preset.name, values);
  };
  const submitSetup = () => {
    if (!canEnable) return;
    onAction("enable", preset.name, values);
  };
  const setTools = (next: string[]) => onToolsChange(preset.name, next);
  const toggleTool = (toolName: string) => {
    const next = new Set(allowAllTools ? toolNames : enabledTools);
    if (next.has(toolName)) next.delete(toolName);
    else next.add(toolName);
    const nextValues = Array.from(next);
    setTools(nextValues.length === toolNames.length ? ["*"] : nextValues);
  };

  return (
    <article className="rounded-[14px] transition-colors hover:bg-muted/45">
      <div className="group flex min-w-0 items-center gap-3 px-3 py-3">
        <McpPresetLogo preset={preset} showBrandLogos={showBrandLogos} />
        <div className="min-w-0 flex-1">
          <div className="flex min-w-0 items-baseline gap-2">
            <h3 className="truncate text-[14px] font-semibold leading-5 text-foreground">{preset.display_name}</h3>
            <AppsTypeBadge>{tx("settings.apps.mcpLabel", "Integration")}</AppsTypeBadge>
          </div>
          <p className="mt-0.5 truncate text-[12.5px] leading-5 text-muted-foreground">{description}</p>
        </div>
        <div className="flex shrink-0 items-center gap-1">
          {readyInstalled ? (
            <>
              <DropdownMenu>
                <DropdownMenuTrigger asChild>
                  <AppsActionButton
                    ariaLabel={statusLabel}
                    busy={testBusy || toolsBusy}
                    disabled={busy}
                    tone="installed"
                  >
                    <Check className="h-4 w-4" aria-hidden />
                  </AppsActionButton>
                </DropdownMenuTrigger>
                <DropdownMenuContent align="end">
                  <DropdownMenuItem disabled={busy} onClick={() => onAction("test", preset.name)}>
                    <PlayCircle className="mr-2 h-3.5 w-3.5" aria-hidden />
                    {tx("settings.mcp.test", "Test")}
                  </DropdownMenuItem>
                  {toolNames.length ? (
                    <DropdownMenuItem disabled={busy} onClick={() => setToolsOpen((open) => !open)}>
                      <SlidersHorizontal className="mr-2 h-3.5 w-3.5" aria-hidden />
                      {tx("settings.mcp.toolScope", "Tools")}
                    </DropdownMenuItem>
                  ) : null}
                  <DropdownMenuItem disabled={busy} onClick={() => onAction("remove", preset.name)}>
                    <Trash2 className="mr-2 h-3.5 w-3.5" aria-hidden />
                    {tx("settings.mcp.remove", "Remove")}
                  </DropdownMenuItem>
                </DropdownMenuContent>
              </DropdownMenu>
              <AppsActionButton
                ariaLabel={tx("settings.mcp.remove", "Remove")}
                busy={removeBusy}
                disabled={busy && !removeBusy}
                tone="danger"
                onClick={() => onAction("remove", preset.name)}
              >
                <Trash2 className="h-4 w-4" aria-hidden />
              </AppsActionButton>
            </>
          ) : preset.installed && !preset.configured ? (
            <AppsActionButton
              ariaLabel={hasFields ? tx("settings.mcp.configure", "Configure") : tx("settings.mcp.enable", "Enable")}
              busy={enableBusy}
              onClick={() => {
                if (hasFields) setSetupOpen(true);
                else onAction("enable", preset.name, values);
              }}
            >
              <Plus className="h-4 w-4" aria-hidden />
            </AppsActionButton>
          ) : preset.install_supported ? (
            <AppsActionButton
              ariaLabel={needsSetupInput ? tx("settings.mcp.setup", "Set up") : tx("settings.mcp.enable", "Enable")}
              busy={enableBusy}
              onClick={enableOrOpenSetup}
            >
              <Plus className="h-4 w-4" aria-hidden />
            </AppsActionButton>
          ) : (
            <AppsActionButton ariaLabel={tx("settings.mcp.comingSoon", "Coming soon")} disabled>
              <Plus className="h-4 w-4" aria-hidden />
            </AppsActionButton>
          )}
        </div>
      </div>

      {setupOpen && preset.install_supported && hasFields ? (
        <div className="mx-3 mb-3 rounded-[14px] bg-background/55 p-3">
          <div className="flex items-center justify-between gap-3">
            <div className="min-w-0">
              <div className="truncate text-[12.5px] font-semibold text-foreground">
                {t("settings.mcp.connectTitle", {
                  name: preset.display_name,
                  defaultValue: "Connect {{name}}",
                })}
              </div>
              <p className="mt-0.5 text-[11.5px] text-muted-foreground">
                {tx("settings.mcp.connectHint", "Add the key from your account settings.")}
              </p>
            </div>
            <Button
              type="button"
              size="sm"
              variant="ghost"
              disabled={busy}
              onClick={() => setSetupOpen(false)}
              className="h-7 rounded-full px-2.5 text-[11.5px] font-semibold text-muted-foreground"
            >
              {tx("actions.cancel", "Cancel")}
            </Button>
          </div>
          <div className="mt-3 grid gap-2">
            {preset.required_fields.map((field) => (
              <label key={field.name} className="min-w-0">
                <span className="mb-1 block text-[11.5px] font-medium text-muted-foreground">
                  {field.label}
                  {field.configured ? (
                    <span className="ml-1 font-normal text-emerald-600 dark:text-emerald-300">
                      {tx("settings.mcp.configured", "configured")}
                    </span>
                  ) : null}
                </span>
                <Input
                  type={field.secret ? "password" : "text"}
                  value={values[field.name] ?? ""}
                  onChange={(event) => onFieldChange(preset.name, field.name, event.target.value)}
                  placeholder={
                    field.configured
                      ? tx("settings.mcp.keepExisting", "Leave blank to keep existing")
                      : field.placeholder
                  }
                  className="h-9 rounded-full bg-background/80 text-[12.5px]"
                />
              </label>
            ))}
          </div>
          <div className="mt-3 flex justify-end">
            <Button
              type="button"
              size="sm"
              disabled={busy || !canEnable}
              onClick={submitSetup}
              className="h-8 rounded-full px-3 text-[12px] font-semibold"
            >
              {enableBusy ? (
                <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
              ) : (
                <Check className="mr-1.5 h-3.5 w-3.5" aria-hidden />
              )}
              {preset.installed
                ? tx("settings.mcp.updateSetup", "Update setup")
                : tx("settings.mcp.saveAndEnable", "Save and enable")}
            </Button>
          </div>
        </div>
      ) : null}

      {toolsOpen && readyInstalled && toolNames.length ? (
        <div className="mx-3 mb-3 rounded-[14px] bg-background/55 p-3">
          <div className="flex flex-wrap items-center justify-between gap-2">
            <div className="text-[11.5px] font-medium text-muted-foreground">
              {tx("settings.mcp.toolScope", "Tools")}
            </div>
            <div className="flex items-center gap-1">
              <Button
                type="button"
                size="sm"
                variant={allowAllTools ? "default" : "outline"}
                disabled={toolsBusy}
                onClick={() => setTools(["*"])}
                className="h-7 rounded-full px-2.5 text-[11.5px] font-semibold"
              >
                {tx("settings.mcp.allTools", "All")}
              </Button>
              <Button
                type="button"
                size="sm"
                variant={!allowAllTools && enabledSet.size === 0 ? "default" : "outline"}
                disabled={toolsBusy}
                onClick={() => setTools([])}
                className="h-7 rounded-full px-2.5 text-[11.5px] font-semibold"
              >
                {tx("settings.mcp.noTools", "None")}
              </Button>
            </div>
          </div>
          <div className="mt-2 flex flex-wrap gap-1.5">
            {toolNames.map((toolName) => {
              const selected = enabledSet.has(toolName);
              return (
                <button
                  key={toolName}
                  type="button"
                  disabled={toolsBusy}
                  onClick={() => toggleTool(toolName)}
                  className={cn(
                    "max-w-full rounded-full border px-2.5 py-1 font-mono text-[11px] transition-colors",
                    selected
                      ? "border-blue-500/25 bg-blue-500/10 text-blue-700 dark:text-blue-300"
                      : "border-border/55 bg-muted/30 text-muted-foreground hover:bg-muted/60",
                  )}
                >
                  <span className="block max-w-[220px] truncate">{toolName}</span>
                </button>
              );
            })}
          </div>
        </div>
      ) : null}
    </article>
  );
}

function AppsTypeBadge({ children }: { children: ReactNode }) {
  return (
    <span className="shrink-0 rounded-full bg-muted px-1.5 py-0.5 text-[10px] font-medium leading-none text-muted-foreground">
      {children}
    </span>
  );
}

const AppsActionButton = forwardRef<HTMLButtonElement, {
  ariaLabel: string;
  busy?: boolean;
  disabled?: boolean;
  tone?: "default" | "installed" | "danger";
  onClick?: () => void;
  children: ReactNode;
}>(function AppsActionButton({
  ariaLabel,
  busy,
  disabled,
  tone = "default",
  onClick,
  children,
}, ref) {
  return (
    <Button
      ref={ref}
      type="button"
      size="icon"
      variant="ghost"
      aria-label={ariaLabel}
      title={ariaLabel}
      disabled={disabled || busy}
      onClick={onClick}
      className={cn(
        "h-9 w-9 rounded-full text-muted-foreground transition-colors",
        tone === "installed" && "bg-transparent hover:bg-muted/70 hover:text-foreground",
        tone === "danger" && "bg-transparent hover:bg-destructive/10 hover:text-destructive",
        tone === "default" && "bg-muted/70 hover:bg-muted hover:text-foreground",
      )}
    >
      {busy ? <Loader2 className="h-4 w-4 animate-spin" aria-hidden /> : children}
    </Button>
  );
});

function appsTitle(item: AppsCatalogItem): string {
  return item.kind === "cli" ? item.app.display_name : item.preset.display_name;
}

function appsReady(item: AppsCatalogItem): boolean {
  return item.kind === "cli" ? item.app.installed : item.preset.installed && item.preset.configured;
}

function appsSearchText(item: AppsCatalogItem): string {
  if (item.kind === "cli") {
    const app = item.app;
    return [
      app.display_name,
      app.name,
      app.category,
      app.description,
      app.requires,
      app.entry_point,
      app.source,
    ]
      .join(" ")
      .toLowerCase();
  }
  const preset = item.preset;
  return [
    preset.display_name,
    preset.name,
    preset.category,
    preset.description,
    preset.requires,
    preset.note,
    preset.transport,
    preset.source ?? "",
  ]
    .join(" ")
      .toLowerCase();
}

function McpCustomServerPanel({
  form,
  configImport,
  actionKey,
  onFormChange,
  onConfigImportChange,
  onSave,
  onImportConfig,
}: {
  form: CustomMcpForm;
  configImport: string;
  actionKey: string | null;
  onFormChange: Dispatch<SetStateAction<CustomMcpForm>>;
  onConfigImportChange: (value: string) => void;
  onSave: () => void;
  onImportConfig: () => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const [activeMode, setActiveMode] = useState<"custom" | "import" | null>(null);
  const [advancedOpen, setAdvancedOpen] = useState(false);
  const customBusy = actionKey?.startsWith("custom:") ?? false;
  const importBusy = actionKey === "import" || actionKey === "import-cursor";
  const remote = form.transport !== "stdio";
  const canSave = Boolean(form.name.trim()) && (remote ? Boolean(form.url.trim()) : Boolean(form.command.trim()));
  const update = <K extends keyof CustomMcpForm>(key: K, value: CustomMcpForm[K]) => {
    onFormChange((prev) => ({ ...prev, [key]: value }));
  };
  const transports: Array<{ value: CustomMcpTransport; label: string }> = [
    { value: "stdio", label: "stdio" },
    { value: "streamableHttp", label: "HTTP" },
    { value: "sse", label: "SSE" },
  ];

  return (
    <section className="overflow-hidden rounded-[16px] bg-settings-surface">
      <div className="flex flex-col gap-3 px-3 py-3 sm:flex-row sm:items-center sm:justify-between">
        <div className="flex min-w-0 items-center gap-3">
          <span className="grid h-9 w-9 shrink-0 place-items-center rounded-[11px] bg-muted text-muted-foreground">
            <Server className="h-4 w-4" aria-hidden />
          </span>
          <div className="min-w-0">
            <h3 className="text-[13px] font-semibold leading-5 text-foreground">
              {tx("settings.mcp.moreOptions", "Add integration")}
            </h3>
            <p className="truncate text-[12px] text-muted-foreground">
              {tx(
                "settings.mcp.moreOptionsSubtitle",
                "Connect a custom tool server or import an existing configuration.",
              )}
            </p>
          </div>
        </div>
        <div className="grid grid-cols-2 gap-2 sm:flex sm:shrink-0">
          <Button
            type="button"
            size="sm"
            variant={activeMode === "custom" ? "default" : "outline"}
            onClick={() => setActiveMode((mode) => (mode === "custom" ? null : "custom"))}
            className="h-8 rounded-full px-3 text-[12px] font-semibold"
          >
            <Server className="mr-1.5 h-3.5 w-3.5" aria-hidden />
            {tx("settings.mcp.customAction", "Custom")}
          </Button>
          <Button
            type="button"
            size="sm"
            variant={activeMode === "import" ? "default" : "outline"}
            onClick={() => setActiveMode((mode) => (mode === "import" ? null : "import"))}
            className="h-8 rounded-full px-3 text-[12px] font-semibold"
          >
            <Database className="mr-1.5 h-3.5 w-3.5" aria-hidden />
            {tx("settings.mcp.importAction", "Import")}
          </Button>
        </div>
      </div>

      {activeMode === "custom" ? (
        <div className="border-t border-border/35 bg-muted/18 px-3 py-3">
          <div className="flex flex-col gap-3 lg:flex-row lg:items-end">
            <label className="min-w-0 flex-1">
              <span className="mb-1.5 block text-[11.5px] font-medium text-muted-foreground">
                {tx("settings.mcp.serverName", "Server name")}
              </span>
              <Input
                value={form.name}
                onChange={(event) => update("name", event.target.value)}
                placeholder="docs"
                className="h-9 rounded-full bg-background/80 text-[12.5px]"
              />
            </label>
            <div className="min-w-[228px]">
              <span className="mb-1.5 block text-[11.5px] font-medium text-muted-foreground">
                {tx("settings.mcp.transport", "Transport")}
              </span>
              <SegmentedControl
                value={form.transport}
                options={transports}
                onChange={(value) => update("transport", value as CustomMcpTransport)}
              />
            </div>
            {remote ? (
              <label className="min-w-0 flex-[1.4]">
                <span className="mb-1.5 block text-[11.5px] font-medium text-muted-foreground">
                  {tx("settings.mcp.serverUrl", "URL")}
                </span>
                <Input
                  value={form.url}
                  onChange={(event) => update("url", event.target.value)}
                  placeholder={form.transport === "sse" ? "https://example.com/sse" : "https://example.com/mcp"}
                  className="h-9 rounded-full bg-background/80 text-[12.5px]"
                />
              </label>
            ) : (
              <label className="min-w-0 flex-[1.4]">
                <span className="mb-1.5 block text-[11.5px] font-medium text-muted-foreground">
                  {tx("settings.mcp.command", "Command")}
                </span>
                <Input
                  value={form.command}
                  onChange={(event) => update("command", event.target.value)}
                  placeholder="npx"
                  className="h-9 rounded-full bg-background/80 text-[12.5px]"
                />
              </label>
            )}
            <Button
              type="button"
              size="sm"
              onClick={onSave}
              disabled={!canSave || customBusy}
              className="h-9 shrink-0 rounded-full px-4 text-[12.5px] font-semibold"
            >
              {customBusy ? <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden /> : <Check className="mr-1.5 h-3.5 w-3.5" aria-hidden />}
              {tx("settings.mcp.saveCustom", "Save MCP")}
            </Button>
          </div>

          <Button
            type="button"
            size="sm"
            variant="ghost"
            onClick={() => setAdvancedOpen((open) => !open)}
            className="mt-2 h-8 rounded-full px-2 text-[12px] font-medium text-muted-foreground hover:text-foreground"
          >
            <ChevronDown
              className={cn("mr-1.5 h-3.5 w-3.5 transition-transform", advancedOpen ? "rotate-180" : "")}
              aria-hidden
            />
            {advancedOpen
              ? tx("settings.mcp.hideAdvanced", "Hide advanced")
              : tx("settings.mcp.advancedOptions", "Advanced options")}
          </Button>

          {advancedOpen ? (
            <div className="mt-2 grid gap-2 lg:grid-cols-[minmax(0,1.2fr)_minmax(0,1fr)_180px]">
              {!remote ? (
                <label className="min-w-0">
                  <span className="mb-1 block text-[11.5px] font-medium text-muted-foreground">
                    {tx("settings.mcp.args", "Args JSON")}
                  </span>
                  <Textarea
                    value={form.args}
                    onChange={(event) => update("args", event.target.value)}
                    placeholder={'["-y", "docs-mcp"]'}
                    className="min-h-[68px] resize-y rounded-[12px] bg-background/80 font-mono text-[12px]"
                  />
                </label>
              ) : (
                <label className="min-w-0">
                  <span className="mb-1 block text-[11.5px] font-medium text-muted-foreground">
                    {tx("settings.mcp.headers", "Headers JSON")}
                  </span>
                  <Textarea
                    value={form.headers}
                    onChange={(event) => update("headers", event.target.value)}
                    placeholder={'{"Authorization":"Bearer ..."}'}
                    className="min-h-[68px] resize-y rounded-[12px] bg-background/80 font-mono text-[12px]"
                  />
                </label>
              )}
              <label className="min-w-0">
                <span className="mb-1 block text-[11.5px] font-medium text-muted-foreground">
                  {tx("settings.mcp.env", "Env JSON")}
                </span>
                <Textarea
                  value={form.env}
                  onChange={(event) => update("env", event.target.value)}
                  placeholder={'{"API_KEY":"..."}'}
                  className="min-h-[68px] resize-y rounded-[12px] bg-background/80 font-mono text-[12px]"
                />
              </label>
              <label className="min-w-0">
                <span className="mb-1 block text-[11.5px] font-medium text-muted-foreground">
                  {tx("settings.mcp.timeout", "Tool timeout")}
                </span>
                <Input
                  value={form.toolTimeout}
                  onChange={(event) => update("toolTimeout", event.target.value)}
                  inputMode="numeric"
                  className="h-9 rounded-full bg-background/80 text-[12.5px]"
                />
              </label>
            </div>
          ) : null}
        </div>
      ) : null}

      {activeMode === "import" ? (
        <div className="border-t border-border/35 bg-muted/18 px-3 py-3">
          <div className="flex flex-col gap-2 lg:flex-row lg:items-end">
            <label className="min-w-0 flex-1">
              <span className="mb-1.5 block text-[11.5px] font-medium text-muted-foreground">
                {tx("settings.mcp.configImport", "Import mcp.json")}
              </span>
              <Textarea
                value={configImport}
                onChange={(event) => onConfigImportChange(event.target.value)}
                placeholder={'{"mcpServers":{"docs":{"command":"npx","args":["-y","docs-mcp"]}}}'}
                className="min-h-[84px] resize-y rounded-[12px] bg-background/80 font-mono text-[12px]"
              />
            </label>
            <Button
              type="button"
              size="sm"
              onClick={onImportConfig}
              disabled={!configImport.trim() || importBusy}
              className="h-9 shrink-0 rounded-full px-4 text-[12.5px] font-semibold"
            >
              {importBusy ? <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden /> : <Database className="mr-1.5 h-3.5 w-3.5" aria-hidden />}
              {tx("settings.mcp.importConfig", "Import")}
            </Button>
          </div>
        </div>
      ) : null}
    </section>
  );
}

function mcpPresetStatusLabel(status: string, tx: (key: string, fallback: string) => string): string {
  switch (status) {
    case "configured":
      return tx("settings.mcp.statusConfigured", "Configured");
    case "missing_credentials":
      return tx("settings.mcp.statusMissingCredentials", "Needs key");
    case "missing_dependency":
      return tx("settings.mcp.statusMissingDependency", "Needs dependency");
    case "coming_soon":
      return tx("settings.mcp.statusComingSoon", "Coming soon");
    default:
      return tx("settings.mcp.statusNotInstalled", "Not enabled");
  }
}

function McpPresetLogo({ preset, showBrandLogos }: { preset: McpPresetInfo; showBrandLogos: boolean }) {
  const bg = preset.brand_color || "hsl(var(--muted))";
  const logoUrls = useMemo(() => logoFallbackUrls(preset.logo_url), [preset.logo_url]);
  const { logoUrl, onLogoError, onLogoLoad } = useLogoFallback(logoUrls);
  const initials = preset.display_name
    .split(/\s+/)
    .filter(Boolean)
    .slice(0, 2)
    .map((part) => part[0]?.toUpperCase())
    .join("") || preset.name.slice(0, 2).toUpperCase();

  if (showBrandLogos && logoUrl) {
    return (
      <span
        className="grid h-11 w-11 shrink-0 place-items-center rounded-[8px] border border-border/45 bg-background"
      >
        <img
          src={logoUrl}
          alt=""
          decoding="async"
          loading="lazy"
          className="h-6 w-6 object-contain"
          onLoad={onLogoLoad}
          onError={onLogoError}
        />
      </span>
    );
  }
  return (
    <span
      className="grid h-11 w-11 shrink-0 place-items-center rounded-[8px] text-[13px] font-semibold text-white"
      style={{ backgroundColor: bg }}
    >
      {initials}
    </span>
  );
}

function CliAppReadyPanel({
  app,
  showBrandLogos,
  onBackToChat,
}: {
  app: CliAppInfo;
  showBrandLogos: boolean;
  onBackToChat: () => void;
}) {
  const { t } = useTranslation();
  const [copied, setCopied] = useState(false);
  const prompt = t("settings.cliApps.readyPrompt", {
    name: app.name,
    defaultValue: "Use @{{name}} to inspect what this CLI can do.",
  });
  const copyPrompt = () => {
    if (!navigator.clipboard) return;
    void navigator.clipboard.writeText(prompt).then(() => {
      setCopied(true);
      window.setTimeout(() => setCopied(false), 1400);
    });
  };

  return (
    <section className="rounded-[12px] bg-settings-surface px-4 py-3">
      <div className="flex flex-col gap-3 sm:flex-row sm:items-center">
        <CliAppLogo app={app} showBrandLogos={showBrandLogos} />
        <div className="min-w-0 flex-1">
          <div className="flex min-w-0 flex-wrap items-center gap-2">
            <h3 className="truncate text-[14px] font-semibold leading-5 text-foreground">
              {app.display_name}
            </h3>
            <span className="inline-flex shrink-0 items-center gap-1 rounded-full bg-muted px-2 py-0.5 text-[10.5px] font-medium text-muted-foreground">
              <Check className="h-3 w-3 text-emerald-600 dark:text-emerald-300" aria-hidden />
              {t("settings.cliApps.readyStatus", { defaultValue: "Ready" })}
            </span>
          </div>
          <div className="mt-0.5 flex min-w-0 flex-wrap items-center gap-1.5 text-[12px] text-muted-foreground">
            <span className="font-mono">@{app.name}</span>
            <span aria-hidden>·</span>
            <span className="truncate font-mono">{app.entry_point || app.name}</span>
            <span aria-hidden>·</span>
            <span>{app.category}</span>
          </div>
        </div>
        <div className="flex shrink-0 flex-wrap gap-2">
          <Button
            type="button"
            size="sm"
            variant="ghost"
            onClick={copyPrompt}
            className="h-8 rounded-full px-3 text-[12px] font-medium text-muted-foreground hover:bg-muted/65 hover:text-foreground"
          >
            {copied ? <Check className="mr-1.5 h-3.5 w-3.5" aria-hidden /> : null}
            {copied
              ? t("settings.cliApps.readyCopied", { defaultValue: "Copied" })
              : t("settings.cliApps.readyTry", { name: app.name, defaultValue: "Try @{{name}}" })}
          </Button>
          <Button
            type="button"
            size="sm"
            onClick={onBackToChat}
            className="h-8 rounded-full px-3 text-[12px] font-semibold"
          >
            {t("settings.cliApps.openChat", { defaultValue: "Open chat" })}
            <ChevronRight className="ml-1.5 h-3.5 w-3.5" aria-hidden />
          </Button>
        </div>
      </div>
    </section>
  );
}

function CliAppLogo({ app, showBrandLogos }: { app: CliAppInfo; showBrandLogos: boolean }) {
  const logoUrls = useMemo(
    () => (isGenericRepositoryLogoUrl(app.logo_url) ? [] : logoFallbackUrls(app.logo_url)),
    [app.logo_url],
  );
  const { logoUrl, logoLoaded, onLogoError, onLogoLoad } = useLogoFallback(logoUrls);
  const initials = app.display_name
    .split(/\s+/)
    .filter(Boolean)
    .slice(0, 2)
    .map((part) => part[0]?.toUpperCase())
    .join("") || app.name.slice(0, 2).toUpperCase();

  const showRemoteLogo = showBrandLogos && Boolean(logoUrl);

  return (
    <span
      className="relative grid h-11 w-11 shrink-0 place-items-center overflow-hidden rounded-[8px] border border-border/45 bg-muted text-[13px] font-semibold"
      style={{ color: app.brand_color || "hsl(var(--muted-foreground))" }}
    >
      <span
        aria-hidden
        className={cn(
          "transition-opacity duration-150 motion-reduce:transition-none",
          showRemoteLogo && logoLoaded ? "opacity-0" : "opacity-100",
        )}
      >
        {initials}
      </span>
      {showRemoteLogo ? (
        <img
          src={logoUrl}
          alt=""
          decoding="async"
          loading="lazy"
          referrerPolicy="no-referrer"
          draggable={false}
          className={cn(
            "absolute h-6 w-6 object-contain transition-opacity duration-150 motion-reduce:transition-none",
            logoLoaded ? "opacity-100" : "opacity-0",
          )}
          onLoad={onLogoLoad}
          onError={onLogoError}
        />
      ) : null}
    </span>
  );
}

function RuntimeSettings({
  form,
  setForm,
  settings,
  dirty,
  saving,
  onSave,
  onRestart,
  isRestarting,
  requiresRestartPending,
  apiService,
  apiServiceLoading,
  apiServiceAction,
  apiServiceError,
  langfuseFeature,
  capabilitiesLoading,
  capabilityAction,
  capabilityError,
  onApiServiceAction,
  onInstallCapability,
}: {
  form: AgentSettingsDraft;
  setForm: Dispatch<SetStateAction<AgentSettingsDraft>>;
  settings: SettingsPayload;
  dirty: boolean;
  saving: boolean;
  onSave: () => void;
  onRestart?: () => void;
  isRestarting?: boolean;
  requiresRestartPending: boolean;
  apiService: ApiServicePayload | null;
  apiServiceLoading: boolean;
  apiServiceAction: "start" | "stop" | null;
  apiServiceError: string | null;
  langfuseFeature?: NanobotFeatureInfo;
  capabilitiesLoading: boolean;
  capabilityAction: string | null;
  capabilityError: string | null;
  onApiServiceAction: (
    action: "start" | "stop",
    values?: { host: string; port: number; timeout: number; apiKey?: string },
  ) => void;
  onInstallCapability: (name: string) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const runtimeSurface = settings.surface ?? settings.runtime_surface;
  const runtimeHost = getRuntimeHost(runtimeSurface, settings.runtime_capabilities);
  const openLogs = runtimeHost.openLogs;
  const exportDiagnostics = runtimeHost.exportDiagnostics;
  const isNativeHost = isNativeRuntime(runtimeSurface);
  const restartActionLabel = isNativeHost
    ? tx("app.system.restartEngine", "Restart engine")
    : t("app.system.restart");
  const restartingActionLabel = isNativeHost
    ? tx("app.system.restartingEngine", "Restarting engine...")
    : t("app.system.restarting");
  const [diagnosticsPath, setDiagnosticsPath] = useState<string | null>(null);
  const [hostActionMessage, setHostActionMessage] = useState<{
    target: "logs" | "diagnostics";
    message: string;
  } | null>(null);
  const [hostActionBusy, setHostActionBusy] =
    useState<"logs" | "diagnostics" | null>(null);
  const apiDefaults = apiService ?? {
    installed: false,
    running: false,
    managed: false,
    host: settings.api?.host ?? "127.0.0.1",
    port: settings.api?.port ?? 8900,
    timeout: settings.api?.timeout ?? 120,
    api_key_hint: settings.api?.api_key_hint,
    endpoint: `http://127.0.0.1:${settings.api?.port ?? 8900}/v1`,
    command: "nanobot serve",
  };
  const [apiHost, setApiHost] = useState(apiDefaults.host);
  const [apiPort, setApiPort] = useState(apiDefaults.port);
  const [apiKey, setApiKey] = useState("");
  const [apiKeyVisible, setApiKeyVisible] = useState(false);
  useEffect(() => {
    if (!apiService) return;
    setApiHost(apiService.host);
    setApiPort(apiService.port);
    setApiKey("");
    setApiKeyVisible(false);
  }, [apiService]);
  const apiNetworkAccess = !isLoopbackHost(apiHost);
  const apiMissingNetworkKey = apiNetworkAccess && !apiKey.trim() && !apiDefaults.api_key_hint;
  const engineState = isRestarting
    ? tx("settings.values.restartingEngine", "Restarting")
    : settings.apply_state?.status === "pending"
      ? tx("settings.values.pending", "Pending")
      : tx("settings.values.ready", "Ready");
  const runHostAction = async (
    target: "logs" | "diagnostics",
    action: (() => Promise<string | void>) | undefined,
    successMessage: (result: string | void) => string,
    failureMessage: string,
  ) => {
    if (!action) {
      setHostActionMessage({
        target,
        message: tx(
          "settings.status.hostApiUnavailable",
          "Host actions are only available inside the native app.",
        ),
      });
      return;
    }
    setHostActionBusy(target);
    setHostActionMessage(null);
    try {
      const result = await action();
      setHostActionMessage({ target, message: successMessage(result) });
    } catch {
      setHostActionMessage({ target, message: failureMessage });
    } finally {
      setHostActionBusy(null);
    }
  };
  return (
    <div className="space-y-7">
      <section>
        <SettingsSectionTitle>{tx("settings.sections.regional", "Regional")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={tx("settings.rows.timezone", "Timezone")}
            description={tx(
              "settings.help.timezone",
              "Used for schedules and time-aware replies.",
            )}
          >
            <TimezonePicker
              value={form.timezone}
              onChange={(timezone) => setForm((prev) => ({ ...prev, timezone }))}
            />
          </SettingsRow>
          <RestartSettingsFooter
            dirty={dirty}
            saving={saving}
            pendingRestart={requiresRestartPending}
            dirtyMessage={
              isNativeHost
                ? tx("settings.status.hostRestartAfterSaving", "Save changes and nanobot will restart its engine.")
                : tx("settings.status.restartAfterSaving", "Save changes, then restart when ready.")
            }
            pendingMessage={
              isNativeHost
                ? tx("settings.status.hostRestartPending", "Saved. Restarting engine when ready.")
                : tx("settings.status.savedRestartApply", "Saved. Restart when ready.")
            }
            onSave={onSave}
            onRestart={onRestart}
            isRestarting={isRestarting}
          />
        </SettingsGroup>
      </section>

      {isNativeHost ? (
        <section>
          <SettingsSectionTitle>{tx("settings.sections.nativeHost", "Native host")}</SettingsSectionTitle>
          <SettingsGroup>
            <ReadOnlyRow title={tx("settings.rows.engine", "Engine")} value={engineState} />
            {settings.runtime_capabilities?.can_open_logs ? (
              <SettingsRow
                title={tx("settings.rows.logs", "Logs")}
                description={
                  hostActionMessage?.target === "logs"
                    ? hostActionMessage.message
                    : tx("settings.help.logs", "Open the native engine log folder.")
                }
              >
                <Button
                  size="sm"
                  variant="outline"
                  onClick={() =>
                    void runHostAction(
                      "logs",
                      openLogs,
                      () => tx("settings.status.logsOpened", "Opened logs folder."),
                      tx("settings.status.logsOpenFailed", "Could not open logs folder."),
                    )
                  }
                  disabled={hostActionBusy !== null}
                  className="rounded-full"
                >
                  {hostActionBusy === "logs"
                    ? tx("settings.actions.opening", "Opening...")
                    : tx("settings.actions.open", "Open")}
                </Button>
              </SettingsRow>
            ) : null}
            {settings.runtime_capabilities?.can_export_diagnostics ? (
              <SettingsRow
                title={tx("settings.rows.diagnostics", "Diagnostics")}
                description={
                  hostActionMessage?.target === "diagnostics"
                    ? hostActionMessage.message
                    : diagnosticsPath
                    ? diagnosticsPath
                    : tx("settings.help.diagnostics", "Export a small runtime report for support.")
                }
              >
                <Button
                  size="sm"
                  variant="outline"
                  onClick={() =>
                    void runHostAction(
                      "diagnostics",
                      exportDiagnostics ? async () => {
                        const path = await exportDiagnostics();
                        setDiagnosticsPath(path);
                        return path;
                      } : undefined,
                      (path) =>
                        t("settings.status.diagnosticsExported", {
                          path: String(path ?? ""),
                          defaultValue: "Diagnostics exported to {{path}}.",
                        }),
                      tx("settings.status.diagnosticsExportFailed", "Could not export diagnostics."),
                    )
                  }
                  disabled={hostActionBusy !== null}
                  className="rounded-full"
                >
                  {hostActionBusy === "diagnostics"
                    ? tx("settings.actions.exporting", "Exporting...")
                    : tx("settings.actions.export", "Export")}
                </Button>
              </SettingsRow>
            ) : null}
          </SettingsGroup>
        </section>
      ) : null}

      <section>
        <SettingsSectionTitle>{tx("settings.api.title", "API server")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={tx("settings.api.openaiCompatible", "OpenAI-compatible API")}
            description={
              apiServiceError
                ? apiServiceError
                : apiDefaults.running
                  ? apiDefaults.endpoint
                  : tx("settings.api.description", "Connect SDKs and agents through a local /v1 endpoint.")
            }
          >
            <div className="flex items-center justify-end gap-2">
              <StatusPill tone={apiDefaults.running ? "success" : "neutral"}>
                {apiServiceLoading
                  ? tx("settings.values.checking", "Checking")
                  : apiDefaults.running
                    ? tx("settings.values.running", "Running")
                    : tx("settings.values.off", "Off")}
              </StatusPill>
              <Button
                size="sm"
                variant="outline"
                disabled={apiServiceLoading || apiServiceAction !== null || apiMissingNetworkKey}
                onClick={() =>
                  onApiServiceAction(
                    apiDefaults.running ? "stop" : "start",
                    apiDefaults.running
                      ? undefined
                      : {
                          host: apiHost,
                          port: apiPort,
                          timeout: apiDefaults.timeout,
                          apiKey: apiKey.trim() || undefined,
                        },
                  )
                }
                className="rounded-full"
              >
                {apiServiceAction ? (
                  <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
                ) : apiDefaults.running ? (
                  <PauseCircle className="mr-1.5 h-3.5 w-3.5" aria-hidden />
                ) : (
                  <PlayCircle className="mr-1.5 h-3.5 w-3.5" aria-hidden />
                )}
                {apiServiceAction === "start"
                  ? tx("settings.api.starting", "Starting...")
                  : apiServiceAction === "stop"
                    ? tx("settings.api.stopping", "Stopping...")
                    : apiDefaults.running
                      ? tx("settings.api.stop", "Stop")
                      : tx("settings.api.start", "Start API server")}
              </Button>
            </div>
          </SettingsRow>
          {!apiDefaults.running ? (
            <>
              <SettingsRow
                title={tx("settings.api.access", "Access")}
                description={
                  apiNetworkAccess
                    ? tx("settings.api.networkHelp", "Other devices can connect; an API key is required.")
                    : tx("settings.api.localHelp", "Only this device can connect.")
                }
              >
                <SegmentedControl
                  value={apiNetworkAccess ? "network" : "local"}
                  options={[
                    { value: "local", label: tx("settings.api.thisDevice", "This device") },
                    { value: "network", label: tx("settings.api.localNetwork", "Local network") },
                  ]}
                  onChange={(value) => setApiHost(value === "network" ? "0.0.0.0" : "127.0.0.1")}
                />
              </SettingsRow>
              <SettingsRow
                title={tx("settings.api.port", "Port")}
                description={tx("settings.api.portHelp", "The API uses this local port.")}
              >
                <NumberInput value={apiPort} min={1} max={65535} onChange={setApiPort} />
              </SettingsRow>
              {apiNetworkAccess ? (
                <SettingsRow
                  title={tx("settings.api.apiKey", "API key")}
                  description={
                    apiMissingNetworkKey
                      ? tx("settings.api.apiKeyRequired", "Required before exposing the API to your network.")
                      : tx("settings.api.apiKeyHelp", "Clients send this as a Bearer token.")
                  }
                >
                  <div className="relative w-[280px] max-w-full">
                    <Input
                      type={apiKeyVisible ? "text" : "password"}
                      value={apiKey}
                      onChange={(event) => setApiKey(event.target.value)}
                      placeholder={apiDefaults.api_key_hint ?? tx("settings.api.apiKeyPlaceholder", "Enter an API key")}
                      className="h-9 rounded-full pr-10 text-[13px]"
                    />
                    <Button
                      type="button"
                      variant="ghost"
                      size="icon"
                      onClick={() => setApiKeyVisible((visible) => !visible)}
                      aria-label={apiKeyVisible ? tx("settings.byok.hideApiKey", "Hide API key") : tx("settings.byok.showApiKey", "Show API key")}
                      className="absolute right-1 top-1/2 h-7 w-7 -translate-y-1/2 rounded-full"
                    >
                      {apiKeyVisible ? <EyeOff className="h-3.5 w-3.5" /> : <Eye className="h-3.5 w-3.5" />}
                    </Button>
                  </div>
                </SettingsRow>
              ) : null}
            </>
          ) : null}
        </SettingsGroup>
        {!apiDefaults.installed && !apiDefaults.running ? (
          <p className="mt-2 text-[11.5px] text-muted-foreground">
            {tx("settings.api.autoInstall", "API support will be installed automatically when you start it.")}
          </p>
        ) : null}
      </section>

      <section>
        <SettingsSectionTitle>{tx("settings.observability.title", "Observability")}</SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title="Langfuse"
            description={
              settings.observability?.configured
                ? tx("settings.observability.configured", "Tracing credentials are available to nanobot.")
                : tx(
                    "settings.observability.environment",
                    "Set LANGFUSE_SECRET_KEY and LANGFUSE_PUBLIC_KEY, then restart nanobot.",
                  )
            }
          >
            {capabilitiesLoading ? (
              <Loader2 className="h-4 w-4 animate-spin text-muted-foreground" aria-hidden />
            ) : langfuseFeature?.installed ? (
              <StatusPill tone={settings.observability?.configured ? "success" : "neutral"}>
                {settings.observability?.configured
                  ? tx("settings.values.ready", "Ready")
                  : tx("settings.values.needsSetup", "Needs setup")}
              </StatusPill>
            ) : (
              <Button
                size="sm"
                variant="outline"
                disabled={capabilityAction === "enable:langfuse"}
                onClick={() => onInstallCapability("langfuse")}
                className="rounded-full"
              >
                {capabilityAction === "enable:langfuse" ? (
                  <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
                ) : null}
                {capabilityAction === "enable:langfuse"
                  ? tx("settings.capabilities.installing", "Installing support...")
                  : tx("settings.observability.enable", "Enable tracing support")}
              </Button>
            )}
          </SettingsRow>
        </SettingsGroup>
        {capabilityError ? <p className="mt-2 text-[12px] text-destructive">{capabilityError}</p> : null}
      </section>

      <section>
        <SettingsSectionTitle>{t("settings.sections.system")}</SettingsSectionTitle>
        <SettingsGroup>
          {!isNativeHost ? (
            <ReadOnlyRow
              title={tx("settings.rows.gateway", "Gateway")}
              value={`${settings.runtime.gateway_host}:${settings.runtime.gateway_port}`}
            />
          ) : null}
          <ReadOnlyRow title={t("settings.rows.configPath")} value={settings.runtime.config_path} />
          <ReadOnlyRow title={tx("settings.rows.workspacePath", "Default workspace")} value={settings.runtime.workspace_path} />
          {onRestart && !requiresRestartPending ? (
            <SettingsRow
              title={t("settings.rows.restart")}
              description={t("app.system.restartHint")}
            >
              <Button
                size="sm"
                variant="outline"
                onClick={onRestart}
                disabled={isRestarting}
                className="rounded-full"
              >
                {isRestarting ? (
                  <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
                ) : (
                  <RotateCcw className="mr-1.5 h-3.5 w-3.5" aria-hidden />
                )}
                {isRestarting ? restartingActionLabel : restartActionLabel}
              </Button>
            </SettingsRow>
          ) : null}
        </SettingsGroup>
      </section>
    </div>
  );
}

function AdvancedSettings({
  form,
  dirty,
  saving,
  requiresRestartPending,
  isNativeHostSurface,
  onChangeForm,
  onSave,
  onRestart,
  isRestarting,
}: {
  form: NetworkSafetySettingsUpdate;
  dirty: boolean;
  saving: boolean;
  requiresRestartPending: boolean;
  isNativeHostSurface: boolean;
  onChangeForm: Dispatch<SetStateAction<NetworkSafetySettingsUpdate>>;
  onSave: () => void;
  onRestart?: () => void;
  isRestarting?: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  return (
    <div className="space-y-7">
      <section>
        <SettingsSectionTitle>
          {isNativeHostSurface
            ? tx("settings.sections.hostSafety", "App safety")
            : tx("settings.sections.webuiSafety", "Web safety")}
        </SettingsSectionTitle>
        <SettingsGroup>
          <SettingsRow
            title={tx("settings.rows.localServiceAccess", "Local Service Access")}
            description={tx(
              isNativeHostSurface ? "settings.help.localServiceAccessNative" : "settings.help.localServiceAccess",
              isNativeHostSurface
                ? "Allow Full Access shell commands to reach services on this Mac."
                : "Allow Full Access shell commands to reach localhost services.",
            )}
          >
            <ToggleButton
              checked={form.webuiAllowLocalServiceAccess}
              onChange={(webuiAllowLocalServiceAccess) =>
                onChangeForm((prev) => ({ ...prev, webuiAllowLocalServiceAccess }))
              }
              ariaLabel={tx("settings.rows.localServiceAccess", "Local Service Access")}
              label={form.webuiAllowLocalServiceAccess ? tx("settings.values.on", "On") : tx("settings.values.off", "Off")}
            />
          </SettingsRow>
          <SettingsRow
            title={tx("settings.rows.webuiDefaultAccess", "Default access")}
            description={tx(
              isNativeHostSurface ? "settings.help.webuiDefaultAccessNative" : "settings.help.webuiDefaultAccess",
              isNativeHostSurface
                ? "Used by native chats without a project-specific permission."
                : "Used by web chats without a project-specific permission.",
            )}
          >
            <SegmentedControl
              value={form.webuiDefaultAccessMode}
              options={[
                { value: "default", label: tx("settings.values.defaultPermission", "Default Permission") },
                { value: "full", label: tx("settings.values.fullAccess", "Full Access") },
              ]}
              onChange={(webuiDefaultAccessMode) =>
                onChangeForm((prev) => ({
                  ...prev,
                  webuiDefaultAccessMode: webuiDefaultAccessMode as WebuiDefaultAccessMode,
                }))
              }
            />
          </SettingsRow>
          <RestartSettingsFooter
            dirty={dirty}
            saving={saving}
            pendingRestart={requiresRestartPending}
            onSave={onSave}
            onRestart={onRestart}
            isRestarting={isRestarting}
          />
        </SettingsGroup>
      </section>

      <p className="max-w-3xl px-1 text-sm leading-6 text-muted-foreground">
        {tx(
          "settings.help.securityManagedControls",
          "Web fetches always protect local, private, and metadata services. Core channel safety stays in config.json.",
        )}
      </p>
    </div>
  );
}

function TimezonePicker({
  value,
  onChange,
}: {
  value: string;
  onChange: (timezone: string) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const [query, setQuery] = useState("");
  const options = useMemo(() => timezoneOptions(value), [value]);
  const filteredOptions = useMemo(() => filterTimezoneOptions(options, query), [options, query]);

  return (
    <DropdownMenu onOpenChange={(open) => !open && setQuery("")}>
      <DropdownMenuTrigger asChild>
        <Button
          type="button"
          variant="outline"
          className={cn(
            "h-8 w-[220px] justify-between rounded-full border-input bg-background px-3 text-[13px] font-normal shadow-none",
            "hover:bg-accent/55 focus-visible:ring-2 focus-visible:ring-ring",
          )}
        >
          <span className="truncate">{value || tx("settings.timezone.select", "Select timezone")}</span>
          <ChevronDown className="ml-2 h-3.5 w-3.5 shrink-0 text-muted-foreground" aria-hidden />
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent
        align="end"
        className="w-[340px] max-w-[calc(100vw-2rem)]"
      >
        <div className="sticky top-0 z-10 bg-popover px-1 pb-1">
          <div className="flex h-9 items-center gap-2 rounded-full border border-input bg-background px-3">
            <Search className="h-3.5 w-3.5 shrink-0 text-muted-foreground" aria-hidden />
            <Input
              autoFocus
              value={query}
              onChange={(event) => setQuery(event.target.value)}
              onKeyDown={(event) => event.stopPropagation()}
              placeholder={tx("settings.timezone.search", "Search timezone")}
              className="h-7 border-0 bg-transparent px-0 text-[13px] shadow-none focus-visible:ring-0"
            />
          </div>
        </div>
        <div
          className="mt-1 max-h-[18rem] overflow-y-auto pr-0.5 scrollbar-thin scrollbar-track-transparent"
          data-testid="timezone-picker-list"
        >
          {filteredOptions.length ? (
            filteredOptions.map((option) => {
              const selected = option.name === value;
              return (
                <DropdownMenuItem
                  key={option.name}
                  onSelect={() => onChange(option.name)}
                  className={cn(
                    "flex h-9 cursor-default items-center justify-between gap-3 rounded-[12px] px-2.5 text-[13px]",
                    "focus:bg-muted/85 focus:text-foreground",
                    selected && "bg-muted/80 text-foreground focus:bg-muted",
                  )}
                >
                  <span className="min-w-0 truncate font-medium text-foreground">{option.name}</span>
                  <span className="ml-auto flex shrink-0 items-center gap-2">
                    <span className="text-[11.5px] font-medium text-muted-foreground/80">
                      {option.offset}
                    </span>
                    {selected ? <Check className="h-3.5 w-3.5 shrink-0" aria-hidden /> : null}
                  </span>
                </DropdownMenuItem>
              );
            })
          ) : (
            <div className="px-3 py-5 text-center text-[12px] text-muted-foreground">
              {tx("settings.timezone.empty", "No matching timezones.")}
            </div>
          )}
        </div>
      </DropdownMenuContent>
    </DropdownMenu>
  );
}

function ProviderPicker({
  providers,
  value,
  emptyLabel,
  showProviderLogos = false,
  onChange,
}: {
  providers: Array<{ name: string; label: string }>;
  value: string;
  emptyLabel: string;
  showProviderLogos?: boolean;
  onChange: (provider: string) => void;
}) {
  const selectedProvider = providers.find((provider) => provider.name === value) ?? null;
  const disabled = providers.length === 0;

  return (
    <DropdownMenu modal={false}>
      <DropdownMenuTrigger asChild disabled={disabled}>
        <Button
          type="button"
          variant="outline"
          disabled={disabled}
          className={cn(
            "h-8 w-[210px] justify-between rounded-full border-input bg-background px-3 text-[13px] font-normal shadow-none",
            "hover:bg-accent/55 focus-visible:ring-2 focus-visible:ring-ring",
            disabled && "text-muted-foreground",
          )}
        >
          <span className="flex min-w-0 items-center gap-2">
            {selectedProvider && showProviderLogos ? (
              <ProviderPickerIcon
                provider={selectedProvider.name}
                showBrandLogos={showProviderLogos}
              />
            ) : null}
            <span className="truncate">{selectedProvider?.label ?? emptyLabel}</span>
          </span>
          <ChevronDown className="ml-2 h-3.5 w-3.5 shrink-0 text-muted-foreground" aria-hidden />
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent
        align="end"
        className="max-h-[18rem] w-[240px] overflow-y-auto scrollbar-thin scrollbar-track-transparent"
      >
        {providers.map((provider) => {
          const selected = provider.name === value;
          return (
            <DropdownMenuItem
              key={provider.name}
              onSelect={() => onChange(provider.name)}
              className={cn(
                "flex cursor-default items-center justify-between gap-2 rounded-[12px] px-2.5 py-2 text-[13px]",
                "focus:bg-muted/85 focus:text-foreground",
                selected && "bg-muted/80 text-foreground focus:bg-muted",
              )}
            >
              <span className="flex min-w-0 items-center gap-2">
                {showProviderLogos ? (
                  <ProviderPickerIcon
                    provider={provider.name}
                    showBrandLogos={showProviderLogos}
                  />
                ) : null}
                <span className="truncate">{provider.label}</span>
              </span>
              {selected ? <Check className="h-3.5 w-3.5 shrink-0" aria-hidden /> : null}
            </DropdownMenuItem>
          );
        })}
      </DropdownMenuContent>
    </DropdownMenu>
  );
}

function ModelIdPicker({
  token,
  settings,
  provider,
  models,
  value,
  showProviderLogos,
  emptyLabel,
  searchPlaceholder,
  emptyMessage,
  onChange,
}: {
  token: string;
  settings: SettingsPayload;
  provider: string;
  models?: string[];
  value: string;
  showProviderLogos: boolean;
  emptyLabel?: string;
  searchPlaceholder?: string;
  emptyMessage?: string;
  onChange: (model: string) => void;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const tokenRef = useRef(token);
  tokenRef.current = token;
  const [open, setOpen] = useState(false);
  const [query, setQuery] = useState("");
  const [payload, setPayload] = useState<ProviderModelsPayload | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const effectiveProvider =
    provider === "auto" ? settings.agent.resolved_provider ?? provider : provider;
  const hasConcreteProvider = Boolean(effectiveProvider && effectiveProvider !== "auto");
  const hasStaticModels = models !== undefined;
  const providerRow = settingsProviderRow(settings, effectiveProvider);
  const providerConfigured = settingsProviderConfigured(settings, effectiveProvider);
  const providerRequiresConfiguration =
    !hasStaticModels && hasConcreteProvider && !providerConfigured;
  const providerHasBuiltinModels = providerRow?.model_catalog === "builtin";
  const providerUsesManualModelIds =
    !hasStaticModels &&
    hasConcreteProvider &&
    providerConfigured &&
    providerRow?.auth_type === "oauth" &&
    !providerHasBuiltinModels;
  const canFetchModels =
    !hasStaticModels &&
    hasConcreteProvider && providerConfigured && !providerUsesManualModelIds;
  const normalizedQuery = query.trim().toLowerCase();
  const providerModels: ProviderModelsPayload["models"] = hasStaticModels
    ? (models?.map((id) => ({ id })) ?? [])
    : (payload?.models ?? []);
  const visibleModels = providerModels
    .filter((model) => {
      if (!normalizedQuery) return true;
      return [model.id, model.label ?? "", model.description ?? "", model.owned_by ?? ""]
        .some((field) => field.toLowerCase().includes(normalizedQuery));
    })
    .slice(0, 80);
  const isCatalog = payload?.catalog_kind === "catalog";
  const defersModelList = DEFERRED_MODEL_LIST_PROVIDERS.has(effectiveProvider);
  const hasDeferredSearchQuery =
    normalizedQuery.length >= DEFERRED_MODEL_LIST_QUERY_MIN_LENGTH;
  const shouldFetchModels =
    canFetchModels && (!defersModelList || hasDeferredSearchQuery);
  const waitingForModelSearch =
    open && canFetchModels && defersModelList && !hasDeferredSearchQuery;
  const hasModelList = hasStaticModels || payload?.status === "available";
  const showModels = Boolean(
    hasModelList && (hasStaticModels || (payload && (!isCatalog || normalizedQuery))),
  );
  const customCandidate = query.trim();
  const allowCustomModel = !providerRequiresConfiguration;
  const exactQueryMatch = providerModels.some((model) => model.id === customCandidate);
  const providerModelCount = payload?.model_count ?? providerModels.length;
  const modelUnconfigured = !value.trim() || !providerConfigured;

  useEffect(() => {
    if (!open) return;
    setQuery(providerUsesManualModelIds || !hasConcreteProvider ? value : "");
  }, [open, effectiveProvider, hasConcreteProvider, providerUsesManualModelIds, value]);

  useEffect(() => {
    if (!open || !shouldFetchModels) {
      setPayload(null);
      setError(null);
      setLoading(false);
      return;
    }
    let cancelled = false;
    setPayload(null);
    setError(null);
    setLoading(true);
    fetchProviderModels(tokenRef.current, effectiveProvider)
      .then((nextPayload) => {
        if (!cancelled) setPayload(nextPayload);
      })
      .catch((err) => {
        if (!cancelled) setError((err as Error).message);
      })
      .finally(() => {
        if (!cancelled) setLoading(false);
      });
    return () => {
      cancelled = true;
    };
  }, [effectiveProvider, open, shouldFetchModels]);

  const selectModel = (model: string) => {
    onChange(model);
    setOpen(false);
  };

  const renderModelRow = (
    model: ProviderModelsPayload["models"][number],
    options: { selected?: boolean } = {},
  ) => (
    <DropdownMenuItem
      key={model.id}
      onSelect={() => selectModel(model.id)}
      className={cn(
        "flex cursor-default items-center justify-between gap-2 rounded-[12px] px-2 py-1.5 text-[12px]",
        "focus:bg-muted/85 focus:text-foreground",
        options.selected && "bg-muted/80 text-foreground focus:bg-muted",
      )}
    >
      <span className="flex min-w-0 items-center gap-2">
        <ProviderPickerIcon
          provider={effectiveProvider}
          showBrandLogos={showProviderLogos}
          unconfigured={!providerConfigured}
        />
        <span className="min-w-0">
          <span className="block truncate font-medium text-foreground">
            {model.label ?? model.id}
          </span>
          {model.description || (model.label && model.label !== model.id) ? (
            <span className="mt-0.5 block truncate text-[10.5px] text-muted-foreground">
              {[model.label && model.label !== model.id ? model.id : null, model.description]
                .filter(Boolean)
                .join(" · ")}
            </span>
          ) : null}
        </span>
      </span>
      <span className="ml-2 flex shrink-0 items-center gap-2 text-[11px] text-muted-foreground">
        {model.context_window ? <span>{formatContextWindow(model.context_window)}</span> : null}
        {options.selected ? <Check className="h-3.5 w-3.5 text-foreground" aria-hidden /> : null}
      </span>
    </DropdownMenuItem>
  );

  return (
    <DropdownMenu open={open} onOpenChange={setOpen}>
      <DropdownMenuTrigger asChild>
        <Button
          type="button"
          variant="outline"
          className={cn(
            "h-9 w-[min(360px,70vw)] justify-between rounded-full border-input bg-background px-3 text-[12px] font-normal shadow-none",
            "hover:bg-accent/55 focus-visible:ring-2 focus-visible:ring-ring",
          )}
        >
          <span className="flex min-w-0 items-center gap-2">
            <ProviderPickerIcon
              provider={effectiveProvider}
              showBrandLogos={showProviderLogos}
              unconfigured={modelUnconfigured}
            />
            <span
              className={cn(
                "min-w-0 truncate font-medium",
                value ? "text-foreground" : "text-muted-foreground",
              )}
            >
              {value || emptyLabel || tx("settings.models.selectModel", "Select model")}
            </span>
          </span>
          <ChevronDown className="ml-2 h-3.5 w-3.5 shrink-0 text-muted-foreground" aria-hidden />
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent
        align="end"
        className="w-[360px] max-w-[calc(100vw-2rem)] p-1.5"
      >
        <div className="p-1 pb-1.5">
          <div className="relative">
            <Search
              className="pointer-events-none absolute left-3 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-muted-foreground"
              aria-hidden
            />
            <Input
              value={query}
              onChange={(event) => setQuery(event.target.value)}
              onKeyDown={(event) => {
                event.stopPropagation();
                if (event.key === "Enter" && allowCustomModel && customCandidate) {
                  event.preventDefault();
                  selectModel(customCandidate);
                }
              }}
              placeholder={
                searchPlaceholder || tx("settings.models.searchModels", "Search or type model ID")
              }
              aria-label={
                searchPlaceholder || tx("settings.models.searchModels", "Search or type model ID")
              }
              className="h-8 rounded-full pl-8 pr-3 text-[12px]"
            />
          </div>
        </div>

        {providerRequiresConfiguration ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {tx("settings.models.providerNotConfigured", "Configure this provider before loading models.")}
          </div>
        ) : hasStaticModels && !providerModels.length ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {emptyMessage || tx("settings.models.unsupportedModelList", "Type a model ID manually.")}
          </div>
        ) : providerUsesManualModelIds ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {tx("settings.models.unsupportedModelList", "Type a model ID manually.")}
          </div>
        ) : !canFetchModels ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {tx("settings.models.autoProviderCustomOnly", "Auto provider mode uses custom model IDs.")}
          </div>
        ) : waitingForModelSearch ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {tx("settings.models.searchCatalog", "Search provider catalog to choose a model.")}
          </div>
        ) : loading ? (
          <div className="flex items-center gap-2 px-2 py-1.5 text-[11px] text-muted-foreground">
            <Loader2 className="h-3.5 w-3.5 animate-spin" aria-hidden />
            {tx("settings.models.loadingModels", "Loading models...")}
          </div>
        ) : error || payload?.status === "error" ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {payload?.message || error || tx("settings.models.loadFailed", "Model list unavailable.")}
          </div>
        ) : payload?.status === "not_configured" ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {tx("settings.models.providerNotConfigured", "Configure this provider before loading models.")}
          </div>
        ) : payload?.status === "unsupported" || payload?.status === "missing_api_base" ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {payload.message || tx("settings.models.unsupportedModelList", "Type a model ID manually.")}
          </div>
        ) : isCatalog && !normalizedQuery ? (
          <div className="px-2 py-1.5 text-[11px] leading-4 text-muted-foreground">
            {tx("settings.models.searchCatalog", "Search provider catalog to choose a model.")}
            {providerModelCount ? ` ${providerModelCount} ${tx("settings.models.modelsAvailable", "available")}.` : ""}
          </div>
        ) : null}

        {showModels && visibleModels.length ? (
          <div className="max-h-[16rem] overflow-y-auto pr-0.5 scrollbar-thin scrollbar-track-transparent">
            {visibleModels.map((model) =>
              renderModelRow(model, { selected: model.id === value }),
            )}
          </div>
        ) : showModels ? (
          <div className="px-2 py-1.5 text-[11px] text-muted-foreground">
            {tx("settings.models.noModelResults", "No matching models.")}
          </div>
        ) : null}

        {allowCustomModel && customCandidate && !exactQueryMatch && customCandidate !== value ? (
          <>
            {showModels ? <DropdownMenuSeparator /> : null}
            <DropdownMenuItem
              onSelect={() => selectModel(customCandidate)}
              className="flex cursor-default items-center gap-2 rounded-[12px] px-2 py-1.5 text-[12px] focus:bg-muted/85"
            >
              <span className="grid h-5 w-5 shrink-0 place-items-center rounded-md bg-muted/80 text-muted-foreground">
                <Pencil className="h-3 w-3" aria-hidden />
              </span>
              <span className="min-w-0 truncate">
                {tx("settings.models.useCustomModel", "Use")}{" "}
                <span className="font-medium text-foreground">“{customCandidate}”</span>
              </span>
            </DropdownMenuItem>
          </>
        ) : null}
      </DropdownMenuContent>
    </DropdownMenu>
  );
}

function formatContextWindow(tokens: number): string {
  if (tokens >= 1_000_000) {
    const value = tokens / 1_000_000;
    return `${Number.isInteger(value) ? value.toFixed(0) : value.toFixed(1)}M`;
  }
  if (tokens >= 1_000) {
    const value = tokens / 1_000;
    return `${Number.isInteger(value) ? value.toFixed(0) : value.toFixed(1)}K`;
  }
  return String(tokens);
}

function formatModelContextWindow(tokens: number): string {
  if (tokens === 65_536) return "64K";
  if (tokens === 262_144) return "256K";
  if (tokens === 1_048_576) return "1M";
  return formatContextWindow(tokens);
}

function ProviderPickerIcon({
  provider,
  showBrandLogos,
  unconfigured = false,
}: {
  provider: string;
  showBrandLogos: boolean;
  unconfigured?: boolean;
}) {
  const brand = providerBrand(provider);
  const Icon = PROVIDER_ICONS[provider] ?? Hexagon;
  const { logoUrl, onLogoError, onLogoLoad } = useLogoFallback(brand?.logoUrls);

  if (unconfigured) {
    return (
      <span
        data-testid="provider-picker-unconfigured-icon"
        className="grid h-5 w-5 shrink-0 place-items-center text-amber-700 dark:text-amber-200"
        aria-hidden
      >
        <CircleAlert className="h-4 w-4" strokeWidth={1.8} />
      </span>
    );
  }

  if (showBrandLogos && logoUrl) {
    return (
      <span
        data-testid={`provider-picker-logo-${provider}`}
        className="grid h-5 w-5 shrink-0 place-items-center overflow-hidden rounded-md border border-border/35 bg-background"
        aria-hidden
      >
        <img
          src={logoUrl}
          alt=""
          decoding="async"
          loading="lazy"
          className="h-3.5 w-3.5 object-contain"
          onLoad={onLogoLoad}
          onError={onLogoError}
        />
      </span>
    );
  }

  if (showBrandLogos && brand) {
    return (
      <span
        data-testid={`provider-picker-logo-fallback-${provider}`}
        className="grid h-5 w-5 shrink-0 place-items-center rounded-md text-[7.5px] font-semibold text-white"
        style={{ backgroundColor: brand.color }}
        aria-hidden
      >
        {brand.initials}
      </span>
    );
  }

  return (
    <span
      className="grid h-5 w-5 shrink-0 place-items-center rounded-md bg-muted text-muted-foreground"
      aria-hidden
    >
      <Icon className="h-3 w-3" strokeWidth={2} />
    </span>
  );
}

function ThirdPartyBrandNotice() {
  const { t } = useTranslation();
  return (
    <p className="px-1 text-[11.5px] leading-5 text-muted-foreground/75">
      {t("settings.legal.thirdPartyBrands", {
        defaultValue:
          "Product names, logos, and brands are property of their respective owners. Use is for identification only and does not imply endorsement.",
      })}
    </p>
  );
}

function orderUnconfiguredProviders(
  providers: SettingsPayload["providers"],
): SettingsPayload["providers"] {
  return providers
    .map((provider, index) => ({ provider, index }))
    .sort((left, right) => {
      const rank = providerVisibilityRank(left.provider) - providerVisibilityRank(right.provider);
      return rank || left.index - right.index;
    })
    .map(({ provider }) => provider);
}

function uniqueProviders(
  providers: SettingsPayload["providers"],
): SettingsPayload["providers"] {
  const seen = new Set<string>();
  return providers.filter((provider) => {
    if (seen.has(provider.name)) return false;
    seen.add(provider.name);
    return true;
  });
}

function providerVisibilityRank(provider: SettingsPayload["providers"][number]): number {
  const localRank = LOCAL_UNCONFIGURED_PROVIDER_ORDER.get(provider.name);
  if (localRank !== undefined) return localRank;
  if ((provider.api_key_required ?? true) === false) return 100;
  return 200;
}

interface TimezoneOption {
  name: string;
  offset: string;
  searchText: string;
}

function timezoneOptions(current: string): TimezoneOption[] {
  return timezonesWithCurrent(current).map((name) => {
    const offset = timezoneOffset(name);
    return {
      name,
      offset,
      searchText: `${name} ${name.replace(/_/g, " ")} ${offset}`.toLowerCase(),
    };
  });
}

function timezonesWithCurrent(current: string): string[] {
  const intl = Intl as typeof Intl & {
    supportedValuesOf?: (key: "timeZone") => string[];
  };
  let values: string[];
  try {
    values = intl.supportedValuesOf?.("timeZone") ?? [];
  } catch {
    values = [];
  }
  const deduped = new Set([...FALLBACK_TIMEZONES, ...values, current].filter(Boolean));
  return Array.from(deduped).sort((left, right) => {
    if (left === "UTC") return -1;
    if (right === "UTC") return 1;
    return left.localeCompare(right);
  });
}

function filterTimezoneOptions(options: TimezoneOption[], query: string): TimezoneOption[] {
  const normalized = query.trim().toLowerCase();
  if (!normalized) return options;
  return options.filter((option) => option.searchText.includes(normalized));
}

function timezoneOffset(timezone: string): string {
  try {
    const parts = new Intl.DateTimeFormat("en-US", {
      timeZone: timezone,
      timeZoneName: "shortOffset",
      hour: "2-digit",
      minute: "2-digit",
    }).formatToParts(new Date());
    const value = parts.find((part) => part.type === "timeZoneName")?.value;
    return value ? value.replace(/^GMT$/, "UTC").replace(/^GMT/, "UTC") : "UTC";
  } catch {
    return "Custom timezone";
  }
}

function optionRowsWithCurrent(
  options: Array<{ name: string; label: string }>,
  value: string,
): Array<{ name: string; label: string }> {
  if (!value || options.some((option) => option.name === value)) return options;
  return [{ name: value, label: value }, ...options];
}

function modelPresetProviderKey(
  preset: SettingsPayload["model_presets"][number],
  settings: SettingsPayload,
  options: { draftProvider?: string } = {},
): string {
  const provider = options.draftProvider ?? preset.provider;
  if (provider === "auto") {
    return (
      preset.resolved_provider ||
      settings.agent.resolved_provider ||
      settings.agent.provider ||
      preset.provider
    );
  }
  return provider;
}

const PROVIDER_ICONS: Record<string, LucideIcon> = {
  custom: Hexagon,
  openrouter: Sparkles,
  skywork: Sparkles,
  aihubmix: Triangle,
  anthropic: Brain,
  openai: Bot,
  deepseek: Waves,
  zhipu: Grid3X3,
  dashscope: Cloud,
  modelscope: Layers,
  moonshot: Moon,
  minimax: Zap,
  minimax_anthropic: Brain,
  groq: Cpu,
  huggingface: Layers,
  gemini: Gem,
  mistral: Orbit,
  siliconflow: Layers,
  volcengine: Cloud,
  volcengine_coding_plan: Cloud,
  byteplus: Cloud,
  byteplus_coding_plan: Cloud,
  qianfan: Database,
  ant_ling: Sparkles,
  azure_openai: Cloud,
  bedrock: Database,
  bocha: Search,
  brave: Search,
  duckduckgo: Search,
  exa: Search,
  jina: Search,
  kagi: Search,
  olostep: Search,
  searxng: Search,
  tavily: Search,
  vllm: Cpu,
  ollama: Cpu,
  lm_studio: Cpu,
  atomic_chat: Cpu,
  ovms: Cpu,
  nvidia: Zap,
};

function ProviderIcon({
  provider,
  showBrandLogos,
}: {
  provider: string;
  showBrandLogos: boolean;
}) {
  const brand = providerBrand(provider);
  const Icon = PROVIDER_ICONS[provider] ?? Hexagon;
  const { logoUrl, onLogoError, onLogoLoad } = useLogoFallback(brand?.logoUrls);

  if (showBrandLogos && logoUrl) {
    return (
      <span
        data-testid={`provider-logo-${provider}`}
        className="grid h-10 w-10 shrink-0 place-items-center overflow-hidden rounded-[14px] border border-border/45 bg-background"
      >
        <img
          src={logoUrl}
          alt=""
          decoding="async"
          loading="lazy"
          className="h-6 w-6 object-contain"
          onLoad={onLogoLoad}
          onError={onLogoError}
        />
      </span>
    );
  }
  if (showBrandLogos && brand) {
    return (
      <span
        data-testid={`provider-logo-fallback-${provider}`}
        className="grid h-10 w-10 shrink-0 place-items-center rounded-[14px] text-[11px] font-semibold text-white"
        style={{ backgroundColor: brand.color }}
        aria-hidden
      >
        {brand.initials}
      </span>
    );
  }
  return (
    <span className="grid h-10 w-10 shrink-0 place-items-center rounded-2xl bg-muted text-foreground/82 dark:bg-muted/70">
      <Icon className="h-5 w-5" strokeWidth={2} aria-hidden />
    </span>
  );
}

function OverviewRowIcon({
  icon: Icon,
}: {
  icon: LucideIcon;
}) {
  return (
    <span className="grid h-9 w-9 shrink-0 place-items-center rounded-[12px] bg-muted text-foreground/82 transition-colors group-hover:bg-muted/80 dark:bg-muted/70">
      <Icon className="h-4 w-4" aria-hidden />
    </span>
  );
}

function OverviewValueLogo({
  provider,
  showBrandLogos,
}: {
  provider: string | null | undefined;
  showBrandLogos: boolean;
}) {
  const brand = provider ? providerBrand(provider) : null;
  const { logoUrl, onLogoError, onLogoLoad } = useLogoFallback(brand?.logoUrls);

  if (!provider || !showBrandLogos || !brand) return null;

  if (logoUrl) {
    return (
      <span
        data-testid={`overview-logo-${provider}`}
        className="grid h-5 w-5 shrink-0 place-items-center overflow-hidden rounded-md border border-border/35 bg-background"
        aria-hidden
      >
        <img
          src={logoUrl}
          alt=""
          decoding="async"
          loading="lazy"
          className="h-3.5 w-3.5 object-contain"
          onLoad={onLogoLoad}
          onError={onLogoError}
        />
      </span>
    );
  }

  return (
    <span
      data-testid={`overview-logo-fallback-${provider}`}
      className="grid h-5 w-5 shrink-0 place-items-center rounded-md text-[7.5px] font-semibold text-white"
      style={{ backgroundColor: brand.color }}
      aria-hidden
    >
      {brand.initials}
    </span>
  );
}

function OverviewListRow({
  icon: Icon,
  valueLogoProvider,
  title,
  value,
  caption,
  showBrandLogos = false,
  onClick,
}: {
  icon: LucideIcon;
  valueLogoProvider?: string | null;
  title: string;
  value: string;
  caption: string;
  showBrandLogos?: boolean;
  onClick: () => void;
}) {
  return (
    <button
      type="button"
      onClick={onClick}
      className="group flex min-h-[68px] w-full items-center gap-3 px-4 py-3.5 text-left transition-colors hover:bg-muted/30 sm:px-5"
    >
      <OverviewRowIcon icon={Icon} />
      <span className="min-w-0 flex-1">
        <span className="block text-[14px] font-medium leading-5 text-foreground">{title}</span>
        <span className="mt-0.5 block truncate text-[12px] leading-5 text-muted-foreground">{caption}</span>
      </span>
      <span className="ml-auto flex min-w-0 max-w-[48%] items-center gap-2">
        <OverviewValueLogo provider={valueLogoProvider} showBrandLogos={showBrandLogos} />
        <span className="truncate text-right text-[13px] leading-5 text-muted-foreground">
          {value}
        </span>
        <ChevronRight
          className="h-4 w-4 shrink-0 text-muted-foreground/60 transition-transform group-hover:translate-x-0.5"
          aria-hidden
        />
      </span>
    </button>
  );
}

function SettingsSectionTitle({ children }: { children: ReactNode }) {
  return (
    <h2 className="mb-2 px-1 text-[13px] font-semibold tracking-[-0.01em] text-foreground/85">
      {children}
    </h2>
  );
}

function SettingsGroup({ children }: { children: ReactNode }) {
  return (
    <div className="overflow-hidden rounded-[22px] bg-settings-surface">
      <div className="divide-y divide-border/45">{children}</div>
    </div>
  );
}

function SettingsRow({
  title,
  description,
  children,
}: {
  title: string;
  description?: string;
  children?: ReactNode;
}) {
  return (
    <div className="flex min-h-[62px] flex-col gap-3 px-4 py-3.5 sm:flex-row sm:items-center sm:justify-between sm:px-5">
      <div className="min-w-0">
        <div className="text-[14px] font-medium leading-5 text-foreground">{title}</div>
        {description ? (
          <div className="mt-0.5 max-w-[28rem] text-[12px] leading-5 text-muted-foreground">
            {description}
          </div>
        ) : null}
      </div>
      {children ? <div className="min-w-0 sm:ml-6 sm:shrink-0">{children}</div> : null}
    </div>
  );
}

function ReadOnlyRow({
  title,
  value,
  description,
}: {
  title: string;
  value: string;
  description?: string;
}) {
  return (
    <SettingsRow title={title} description={description}>
      <span className="block max-w-full truncate text-left text-[13px] text-muted-foreground sm:max-w-[320px] sm:text-right">
        {value}
      </span>
    </SettingsRow>
  );
}

function RestartSettingsFooter({
  dirty,
  saving,
  pendingRestart,
  disabled = false,
  message,
  dirtyMessage,
  pendingMessage,
  onSave,
  onRestart,
  onReset,
  isRestarting,
}: {
  dirty: boolean;
  saving: boolean;
  pendingRestart: boolean;
  disabled?: boolean;
  message?: string;
  dirtyMessage?: string;
  pendingMessage?: string;
  onSave: () => void;
  onRestart?: () => void;
  onReset?: () => void;
  isRestarting?: boolean;
}) {
  const { t } = useTranslation();
  const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
  const isNativeHost = isNativeRuntime();
  const restartLabel = isNativeHost
    ? tx("app.system.restartEngine", "Restart engine")
    : t("app.system.restart");
  const restartingLabel = isNativeHost
    ? tx("app.system.restartingEngine", "Restarting engine...")
    : t("app.system.restarting");
  const statusMessage =
    message ??
    (pendingRestart && !dirty
      ? pendingMessage ?? tx("settings.status.savedRestartApply", "Saved. Restart when ready.")
      : dirty
        ? dirtyMessage ?? t("settings.status.unsaved")
        : undefined);
  const statusTone = disabled ? "danger" : dirty || pendingRestart ? "accent" : undefined;

  return (
    <div className="flex min-h-[58px] flex-col gap-3 px-4 py-3 sm:flex-row sm:items-center sm:justify-between sm:px-5">
      <div className="min-w-0 text-[13px] leading-5 text-muted-foreground">
        <SettingsStatusMessage tone={statusTone}>{statusMessage}</SettingsStatusMessage>
      </div>
      <div className="flex w-full shrink-0 flex-wrap justify-end gap-2 sm:w-auto">
        {pendingRestart && !dirty && onRestart ? (
          <Button
            size="sm"
            variant="ghost"
            onClick={onRestart}
            disabled={isRestarting}
            className="rounded-full"
          >
            {isRestarting ? (
              <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" aria-hidden />
            ) : (
              <RotateCcw className="mr-1.5 h-3.5 w-3.5" aria-hidden />
            )}
            {isRestarting ? restartingLabel : restartLabel}
          </Button>
        ) : null}
        {onReset ? (
          <Button
            size="sm"
            variant="ghost"
            onClick={onReset}
            disabled={!dirty || saving}
            className="rounded-full"
          >
            {t("settings.actions.cancel")}
          </Button>
        ) : null}
        <Button
          size="sm"
          variant="outline"
          onClick={onSave}
          disabled={!dirty || disabled || saving}
          className="rounded-full"
        >
          {saving ? t("settings.actions.saving") : t("settings.actions.save")}
        </Button>
      </div>
    </div>
  );
}

function SettingsStatusMessage({
  children,
  tone,
}: {
  children?: ReactNode;
  tone?: "accent" | "danger";
}) {
  if (!children) return null;
  return (
    <span
      className={cn(
        "inline-flex items-center gap-2",
        tone === "accent" && "font-medium text-blue-600 dark:text-blue-300",
        tone === "danger" && "font-medium text-destructive",
      )}
    >
      {tone ? (
        <span
          className={cn(
            "h-1.5 w-1.5 shrink-0 rounded-full",
            tone === "accent" &&
              "bg-blue-500 dark:bg-blue-400",
            tone === "danger" && "bg-destructive/70",
          )}
          aria-hidden
        />
      ) : null}
      <span>{children}</span>
    </span>
  );
}

function StatusPill({
  children,
  tone = "neutral",
}: {
  children: ReactNode;
  tone?: "neutral" | "success" | "warning";
}) {
  return (
    <span
      className={cn(
        "inline-flex max-w-[260px] items-center rounded-full px-2.5 py-1 text-[12px] font-medium",
        tone === "success" && "bg-emerald-500/10 text-emerald-700 dark:text-emerald-300",
        tone === "warning" && "bg-amber-500/10 text-amber-700 dark:text-amber-300",
        tone === "neutral" && "bg-muted text-muted-foreground",
      )}
    >
      <span className="truncate">{children}</span>
    </span>
  );
}

function SegmentedControl({
  value,
  options,
  onChange,
}: {
  value: string;
  options: Array<{ value: string; label: string }>;
  onChange: (value: string) => void;
}) {
  return (
    <div className="inline-flex h-8 items-center rounded-full bg-muted p-0.5 text-[12px] font-medium text-muted-foreground">
      {options.map((option) => (
        <button
          key={option.value}
          type="button"
          aria-pressed={value === option.value}
          onClick={() => onChange(option.value)}
          className={cn(
            "rounded-full px-3 py-1 transition-colors",
            value === option.value &&
              "bg-background text-foreground ring-1 ring-inset ring-border/45",
          )}
        >
          {option.label}
        </button>
      ))}
    </div>
  );
}

function NumberInput({
  value,
  min,
  max,
  onChange,
  suffix,
}: {
  value: number;
  min: number;
  max: number;
  onChange: (value: number) => void;
  suffix?: string;
}) {
  return (
    <div className="flex items-center gap-2">
      <Input
        type="number"
        min={min}
        max={max}
        value={value}
        onChange={(event) => {
          const parsed = Number(event.target.value);
          if (Number.isFinite(parsed)) onChange(parsed);
        }}
        className="h-8 w-24 max-w-full rounded-full text-[13px]"
      />
      {suffix ? <span className="text-[12px] text-muted-foreground">{suffix}</span> : null}
    </div>
  );
}