diff --git a/nanobot/channels/feishu/webui/FeishuAssistantsPanel.tsx b/nanobot/channels/feishu/webui/FeishuAssistantsPanel.tsx
index 7b6344f6c..f9536903a 100644
--- a/nanobot/channels/feishu/webui/FeishuAssistantsPanel.tsx
+++ b/nanobot/channels/feishu/webui/FeishuAssistantsPanel.tsx
@@ -59,7 +59,7 @@ export function FeishuAssistantsPanel({
           />
         ),
         footer: (
-          <div className="mt-4 overflow-hidden rounded-[16px] border border-border/70 bg-background px-4 py-4">
+          <div className="mt-4 overflow-hidden rounded-floating border border-border/70 bg-background px-4 py-4">
             <div className="text-[13px] font-semibold text-foreground">
               {tx("custom.createAnother", "Create another assistant")}
             </div>
@@ -144,7 +144,7 @@ function FeishuInstanceAction({
         </Button>
       </div>
       {error ? (
-        <div className="mt-3 rounded-[12px] border border-destructive/20 px-3 py-2 text-[12px] leading-5 text-destructive">
+        <div className="mt-3 rounded-control border border-destructive/20 px-3 py-2 text-[12px] leading-5 text-destructive">
           {error}
         </div>
       ) : null}
diff --git a/nanobot/channels/weixin/webui/WeixinPanel.tsx b/nanobot/channels/weixin/webui/WeixinPanel.tsx
index adfda64f9..00f412f46 100644
--- a/nanobot/channels/weixin/webui/WeixinPanel.tsx
+++ b/nanobot/channels/weixin/webui/WeixinPanel.tsx
@@ -197,7 +197,7 @@ export function WeixinPanel({
   });
 
   return (
-    <aside className="min-h-full rounded-[20px] bg-settings-surface p-5">
+    <aside className="min-h-full rounded-panel bg-settings-surface p-5">
       <div className="flex items-start justify-between gap-4">
         <div className="flex min-w-0 items-start gap-3">
           <WeixinLogo showBrandLogos={showBrandLogos} />
@@ -251,7 +251,7 @@ export function WeixinPanel({
       </div>
 
       {runtimeError ? (
-        <div className="mt-4 rounded-[12px] border border-destructive/20 bg-destructive/5 px-3 py-2 text-[12px] leading-5 text-destructive">
+        <div className="mt-4 rounded-control border border-destructive/20 bg-destructive/5 px-3 py-2 text-[12px] leading-5 text-destructive">
           {runtimeError}
         </div>
       ) : null}
@@ -304,7 +304,7 @@ export function WeixinPanel({
         {saveError ? (
           <div
             role="alert"
-            className="rounded-[12px] border border-destructive/20 bg-destructive/5 px-3 py-2 text-[12px] leading-5 text-destructive"
+            className="rounded-control border border-destructive/20 bg-destructive/5 px-3 py-2 text-[12px] leading-5 text-destructive"
           >
             {saveError}
           </div>
@@ -413,7 +413,7 @@ function WeixinLogo({ showBrandLogos }: { showBrandLogos: boolean }) {
   const { logoUrl, onLogoError, onLogoLoad } = useLogoFallback(logoUrls);
   if (showBrandLogos && logoUrl) {
     return (
-      <span className="grid h-10 w-10 shrink-0 place-items-center rounded-[12px] bg-background">
+      <span className="grid h-10 w-10 shrink-0 place-items-center rounded-control bg-background">
         <img
           src={logoUrl}
           alt=""
@@ -428,7 +428,7 @@ function WeixinLogo({ showBrandLogos }: { showBrandLogos: boolean }) {
   }
   return (
     <span
-      className="flex h-10 w-10 shrink-0 items-center justify-center rounded-[12px] bg-background text-[11px] font-bold"
+      className="flex h-10 w-10 shrink-0 items-center justify-center rounded-control bg-background text-[11px] font-bold"
       style={{ color: "#07C160" }}
       aria-hidden
     >
diff --git a/webui/src/App.tsx b/webui/src/App.tsx
index 2959cdfad..43729e05b 100644
--- a/webui/src/App.tsx
+++ b/webui/src/App.tsx
@@ -563,7 +563,7 @@ function PairingCodePopup({
       aria-label={t("app.pairing.title", { defaultValue: "Pair a chat user" })}
       className={cn(
         "fixed right-4 top-[calc(0.75rem+env(safe-area-inset-top))] z-[70]",
-        "w-[min(calc(100vw-2rem),24rem)] rounded-[24px]",
+        "w-[min(calc(100vw-2rem),24rem)] rounded-modal",
         floatingSurfaceElevationClassName,
         "p-4",
         "animate-in fade-in-0 slide-in-from-top-2 duration-200",
diff --git a/webui/src/components/AttachmentTile.tsx b/webui/src/components/AttachmentTile.tsx
index 3249147ea..914cb393f 100644
--- a/webui/src/components/AttachmentTile.tsx
+++ b/webui/src/components/AttachmentTile.tsx
@@ -94,7 +94,7 @@ export function AttachmentTile({ attachment, className, inline = false, variant
         title={attachment.name ?? undefined}
         aria-label={label}
         className={cn(
-          "flex max-w-[18rem] items-center gap-2 rounded-[14px]",
+          "flex max-w-[18rem] items-center gap-2 rounded-control",
           "border border-border/60 bg-muted/40 px-3 py-2 text-xs text-muted-foreground",
           "transition-colors hover:bg-muted/55 hover:text-foreground",
           variant === "compact" && "max-w-[14rem] rounded-xl px-2.5 py-1.5 text-[11.5px]",
@@ -109,7 +109,7 @@ export function AttachmentTile({ attachment, className, inline = false, variant
   return (
     <div
       className={cn(
-        "flex max-w-[18rem] items-center gap-2 rounded-[14px]",
+        "flex max-w-[18rem] items-center gap-2 rounded-control",
         "border border-border/60 bg-muted/35 px-3 py-2 text-xs text-muted-foreground",
         variant === "compact" && "max-w-[14rem] rounded-xl px-2.5 py-1.5 text-[11.5px]",
         className,
@@ -139,7 +139,7 @@ function AttachmentFrame({
   variant?: "default" | "compact";
 }) {
   const frameClassName = cn(
-    "not-prose my-3 block w-fit max-w-full overflow-hidden rounded-[14px]",
+    "not-prose my-3 block w-fit max-w-full overflow-hidden rounded-control",
     "border border-border/60 bg-muted/40",
     attachment.kind === "image" && "bg-background/85",
     attachment.kind === "video" ? "w-[min(100%,32rem)]" : "",
diff --git a/webui/src/components/ChatList.tsx b/webui/src/components/ChatList.tsx
index de995eb7f..422340bcc 100644
--- a/webui/src/components/ChatList.tsx
+++ b/webui/src/components/ChatList.tsx
@@ -807,7 +807,7 @@ export const ChatList = memo(function ChatList({
                             actionMenus.openFromContextMenu(event, actionMenuId)
                           )}
                           className={cn(
-                            "group flex min-w-0 max-w-full items-center gap-1 rounded-[0.65rem] px-2 text-[13px]",
+                            "group flex min-w-0 max-w-full items-center gap-1 rounded-control px-2 text-[13px]",
                             SIDEBAR_SELECTION_ITEM_CLASS,
                             compact ? "min-h-7" : "min-h-8",
                             topicActive
@@ -1081,7 +1081,7 @@ function WorkbenchTabHeader({
       data-workbench-tab
       onContextMenu={(event) => actionMenus.openFromContextMenu(event, actionMenuId)}
       className={cn(
-        "group/tab flex min-w-0 items-center gap-0.5 rounded-[0.65rem] px-1.5 text-sidebar-foreground/85",
+        "group/tab flex min-w-0 items-center gap-0.5 rounded-control px-1.5 text-sidebar-foreground/85",
         collapsed ? "min-h-6" : "min-h-7",
       )}
     >
@@ -1281,7 +1281,7 @@ function ActivePaneRows({
                 actionMenus.openFromContextMenu(event, actionMenuId)
               )}
               className={cn(
-                "group/pane flex min-w-0 max-w-full items-center gap-1 rounded-[0.65rem] px-2 text-[13px]",
+                "group/pane flex min-w-0 max-w-full items-center gap-1 rounded-control px-2 text-[13px]",
                 SIDEBAR_SELECTION_ITEM_CLASS,
                 compact ? "min-h-7" : "min-h-8",
                 active
diff --git a/webui/src/components/CliAppMentionText.tsx b/webui/src/components/CliAppMentionText.tsx
index 3c12c9c90..161842c46 100644
--- a/webui/src/components/CliAppMentionText.tsx
+++ b/webui/src/components/CliAppMentionText.tsx
@@ -203,7 +203,7 @@ export function CliAppMentionToken({
           <span
             data-testid={`${testIdPrefix}-cli-mention-logo-${app.name}`}
             className={cn(
-              "absolute left-1/2 top-1/2 grid place-items-center overflow-hidden rounded-[3px]",
+              "absolute left-1/2 top-1/2 grid place-items-center overflow-hidden rounded-mark",
               "-translate-x-1/2 -translate-y-1/2",
               isHero ? "h-[0.74em] w-[0.74em]" : "h-[0.72em] w-[0.72em]",
             )}
@@ -260,7 +260,7 @@ export function McpPresetMentionToken({
           <span
             data-testid={`${testIdPrefix}-mcp-mention-logo-${preset.name}`}
             className={cn(
-              "absolute left-1/2 top-1/2 grid place-items-center overflow-hidden rounded-[3px]",
+              "absolute left-1/2 top-1/2 grid place-items-center overflow-hidden rounded-mark",
               "-translate-x-1/2 -translate-y-1/2",
               isHero ? "h-[0.74em] w-[0.74em]" : "h-[0.72em] w-[0.72em]",
             )}
diff --git a/webui/src/components/CodeBlock.tsx b/webui/src/components/CodeBlock.tsx
index e1e780767..309200b88 100644
--- a/webui/src/components/CodeBlock.tsx
+++ b/webui/src/components/CodeBlock.tsx
@@ -202,7 +202,7 @@ export function CodeBlock({
     <div
       className={cn(
         "not-prose relative overflow-hidden",
-        hasChrome && "rounded-[18px] bg-secondary/70",
+        hasChrome && "rounded-floating bg-secondary/70",
         className,
       )}
       data-language={language || t("code.fallbackLanguage")}
diff --git a/webui/src/components/DeleteConfirm.tsx b/webui/src/components/DeleteConfirm.tsx
index 07a921be4..ee09ddc63 100644
--- a/webui/src/components/DeleteConfirm.tsx
+++ b/webui/src/components/DeleteConfirm.tsx
@@ -96,16 +96,16 @@ export function DeleteConfirm({
             </div>
           ) : null}
         </AlertDialogHeader>
-        <AlertDialogFooter className="mt-7 !grid grid-cols-1 gap-3 space-x-0 sm:grid-cols-2 sm:space-x-0">
+        <AlertDialogFooter className="mt-6 !grid grid-cols-1 gap-2 sm:grid-cols-2">
           <AlertDialogCancel
             onClick={onCancel}
-            className="mt-0 h-11 w-full min-w-0 rounded-full border-0 bg-muted/70 px-5 text-[15px] font-semibold text-foreground shadow-none hover:bg-muted"
+            className="mt-0 w-full min-w-0"
           >
             {t("deleteConfirm.cancel")}
           </AlertDialogCancel>
           <AlertDialogAction
             onClick={onConfirm}
-            className="h-11 w-full min-w-0 !whitespace-normal rounded-full bg-destructive px-5 text-center text-[15px] font-semibold text-destructive-foreground shadow-none hover:bg-destructive/90"
+            className="w-full min-w-0 !whitespace-normal bg-destructive text-center text-destructive-foreground hover:bg-destructive/90"
           >
             {hasAutomations
               ? t("deleteConfirm.confirmWithAutomations")
diff --git a/webui/src/components/FilePreviewPanel.tsx b/webui/src/components/FilePreviewPanel.tsx
index 3609a15ff..08e093240 100644
--- a/webui/src/components/FilePreviewPanel.tsx
+++ b/webui/src/components/FilePreviewPanel.tsx
@@ -183,7 +183,7 @@ export function FilePreviewPanel({
                     ) : null}
                     <span
                       className={cn(
-                        "min-w-0 truncate rounded-[4px] px-1 py-0.5",
+                        "min-w-0 truncate rounded-mark px-1 py-0.5",
                         isLast
                           ? "font-medium text-foreground"
                           : "max-w-[26vw] shrink text-muted-foreground/78",
diff --git a/webui/src/components/FileReferenceChip.tsx b/webui/src/components/FileReferenceChip.tsx
index ddb129c79..80a63d592 100644
--- a/webui/src/components/FileReferenceChip.tsx
+++ b/webui/src/components/FileReferenceChip.tsx
@@ -78,7 +78,7 @@ export function FileReferenceChip({
                 "text-sky-600 transition-colors hover:text-sky-700",
                 "dark:text-sky-300 dark:hover:text-sky-200",
                 interactive && [
-                  "cursor-pointer rounded-[5px]",
+                  "cursor-pointer rounded-compact",
                   "focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-sky-400/45",
                 ],
               )}
@@ -110,7 +110,7 @@ export function FileReferenceChip({
           sideOffset={8}
           collisionPadding={12}
           className={cn(
-            "max-w-[min(38rem,calc(100vw-2rem))] rounded-[10px]",
+            "max-w-[min(38rem,calc(100vw-2rem))] rounded-control",
             "px-2.5 py-1.5",
             "break-all font-mono text-[11px] leading-snug text-popover-foreground",
           )}
diff --git a/webui/src/components/ImageLightbox.tsx b/webui/src/components/ImageLightbox.tsx
index 90819afa5..c3faae8fe 100644
--- a/webui/src/components/ImageLightbox.tsx
+++ b/webui/src/components/ImageLightbox.tsx
@@ -120,7 +120,7 @@ export function ImageLightbox({
               alt={current.name ?? ""}
               decoding="async"
               draggable={false}
-              className="max-h-[92vh] max-w-[94vw] select-none rounded-[6px] object-contain shadow-2xl"
+              className="max-h-[92vh] max-w-[94vw] select-none rounded-compact object-contain shadow-2xl"
             />
           </div>
 
diff --git a/webui/src/components/MarkdownTextRenderer.tsx b/webui/src/components/MarkdownTextRenderer.tsx
index 970f07140..05f4f8c1f 100644
--- a/webui/src/components/MarkdownTextRenderer.tsx
+++ b/webui/src/components/MarkdownTextRenderer.tsx
@@ -450,7 +450,7 @@ function InlineLinkPreviewRow({ link }: { link: InlineLinkPreview }) {
     >
       <span
         className={cn(
-          "relative grid h-4 w-4 shrink-0 place-items-center overflow-hidden rounded-[4px]",
+          "relative grid h-4 w-4 shrink-0 place-items-center overflow-hidden rounded-mark",
           "border border-border/65 bg-background text-muted-foreground",
         )}
         aria-hidden
@@ -459,7 +459,7 @@ function InlineLinkPreviewRow({ link }: { link: InlineLinkPreview }) {
           <img
             src={favicon}
             alt=""
-            className="h-3 w-3 rounded-[2px] object-contain"
+            className="h-3 w-3 rounded-mark object-contain"
             decoding="async"
             loading="lazy"
             referrerPolicy="no-referrer"
@@ -745,7 +745,7 @@ export default function MarkdownTextRenderer({
       },
       mark({ children: markdownChildren }) {
         return (
-          <mark className="rounded-[5px] bg-yellow-200/75 px-1 py-0.5 text-inherit dark:bg-yellow-300/25">
+          <mark className="rounded-compact bg-yellow-200/75 px-1 py-0.5 text-inherit dark:bg-yellow-300/25">
             {markdownChildren}
           </mark>
         );
diff --git a/webui/src/components/MessageBubble.tsx b/webui/src/components/MessageBubble.tsx
index ba1179f3b..56b357a37 100644
--- a/webui/src/components/MessageBubble.tsx
+++ b/webui/src/components/MessageBubble.tsx
@@ -331,7 +331,7 @@ export function MessageBubble({
           <p
             data-temporary-message={temporary ? "true" : undefined}
             className={cn(
-              "ml-auto w-fit max-w-full min-w-0 rounded-[18px] px-4 py-2",
+              "ml-auto w-fit max-w-full min-w-0 rounded-floating px-4 py-2",
               "text-left text-[16px]/[1.75] whitespace-pre-wrap [overflow-wrap:anywhere]",
               temporary
                 ? "border border-dashed border-muted-foreground/40 bg-transparent"
@@ -499,7 +499,7 @@ function UserQuotedContext({ text, label }: { text: string; label: string }) {
   return (
     <blockquote
       className={cn(
-        "ml-auto flex w-fit max-w-full min-w-0 items-start gap-2 rounded-[14px]",
+        "ml-auto flex w-fit max-w-full min-w-0 items-start gap-2 rounded-control",
         "border border-border/60 bg-muted/35 px-3 py-2 text-left text-muted-foreground",
       )}
       aria-label={label}
@@ -718,8 +718,8 @@ function UserImageCell({
   const tileClasses = cn(
     "relative overflow-hidden border border-border/60 bg-muted/40",
     size === "large"
-      ? "w-[min(100%,34rem)] rounded-[20px] bg-transparent"
-      : "h-24 w-24 rounded-[14px]",
+      ? "w-[min(100%,34rem)] rounded-panel bg-transparent"
+      : "h-24 w-24 rounded-control",
     "shadow-[0_6px_18px_-14px_rgba(0,0,0,0.45)]",
   );
 
diff --git a/webui/src/components/RenameChatDialog.tsx b/webui/src/components/RenameChatDialog.tsx
index e62b677d1..da558cd4f 100644
--- a/webui/src/components/RenameChatDialog.tsx
+++ b/webui/src/components/RenameChatDialog.tsx
@@ -44,41 +44,38 @@ export function RenameChatDialog({
     <Dialog open={open} onOpenChange={(next) => {
       if (!next) onCancel();
     }}>
-      <DialogContent className="max-w-sm rounded-[20px] p-5 sm:p-6">
+      <DialogContent className="max-w-sm">
         <form
-          className="grid gap-5"
+          className="grid gap-4"
           onSubmit={(event) => {
             event.preventDefault();
             if (!trimmed) return;
             onConfirm(trimmed);
           }}
         >
-          <DialogHeader className="space-y-1 text-left">
-            <DialogTitle className="text-xl leading-tight">
-              {dialogTitle ?? t("chat.renameTitle")}
-            </DialogTitle>
-            <DialogDescription className="leading-relaxed">
+          <DialogHeader className="text-left">
+            <DialogTitle>{dialogTitle ?? t("chat.renameTitle")}</DialogTitle>
+            <DialogDescription>
               {description ?? t("chat.renameDescription")}
             </DialogDescription>
           </DialogHeader>
           <Input
-            className="h-11 rounded-xl border-border/80 bg-muted/20 px-3.5 text-[15px]"
             value={value}
             onChange={(event) => setValue(event.target.value)}
             placeholder={placeholder ?? t("chat.renamePlaceholder")}
             autoFocus
             maxLength={160}
           />
-          <DialogFooter className="gap-2 pt-1 sm:space-x-0">
+          <DialogFooter>
             <Button
-              className="min-w-20 rounded-xl"
+              className="min-w-20"
               type="button"
               variant="outline"
               onClick={onCancel}
             >
               {t("deleteConfirm.cancel")}
             </Button>
-            <Button className="min-w-20 rounded-xl" type="submit" disabled={!trimmed}>
+            <Button className="min-w-20" type="submit" disabled={!trimmed}>
               {t("chat.renameSave")}
             </Button>
           </DialogFooter>
diff --git a/webui/src/components/SessionSearchDialog.tsx b/webui/src/components/SessionSearchDialog.tsx
index 2b6288d63..dd72b4e8c 100644
--- a/webui/src/components/SessionSearchDialog.tsx
+++ b/webui/src/components/SessionSearchDialog.tsx
@@ -120,7 +120,6 @@ export function SessionSearchDialog({
         showCloseButton={false}
         className={cn(
           "flex max-h-[min(40rem,calc(100vh-2rem))] w-[calc(100vw-2rem)] max-w-[42rem] flex-col gap-0 overflow-hidden p-0",
-          "rounded-[22px]",
         )}
       >
         <DialogTitle className="sr-only">{t("sidebar.searchAria")}</DialogTitle>
@@ -183,7 +182,7 @@ export function SessionSearchDialog({
                         onMouseEnter={() => setHighlightedIndex(index)}
                         aria-current={active ? "page" : undefined}
                         className={cn(
-                          "grid min-h-[54px] w-full min-w-0 grid-cols-[minmax(0,1fr)_auto] items-center gap-3 rounded-[11px] px-3 py-2 text-left transition-colors",
+                          "grid min-h-[54px] w-full min-w-0 grid-cols-[minmax(0,1fr)_auto] items-center gap-3 rounded-control px-3 py-2 text-left transition-colors",
                           highlighted
                             ? "bg-muted text-foreground"
                             : "text-foreground hover:bg-muted",
diff --git a/webui/src/components/settings/SettingsPage.tsx b/webui/src/components/settings/SettingsPage.tsx
index 28d2d17a5..53e3352e8 100644
--- a/webui/src/components/settings/SettingsPage.tsx
+++ b/webui/src/components/settings/SettingsPage.tsx
@@ -621,7 +621,7 @@ export function SettingsPage({
           ) : null}
 
           {loading ? (
-            <div className="flex h-48 items-center justify-center rounded-[22px] bg-settings-surface text-sm text-muted-foreground">
+            <div className="flex h-48 items-center justify-center rounded-panel bg-settings-surface text-sm text-muted-foreground">
               <Loader2 className="mr-2 h-4 w-4 animate-spin" />
               {t("settings.status.loading")}
             </div>
@@ -640,7 +640,7 @@ export function SettingsPage({
               )}
             >
               {error ? (
-                <div className="rounded-[18px] border border-destructive/20 bg-destructive/5 px-4 py-3 text-[13px] text-destructive">
+                <div className="rounded-floating border border-destructive/20 bg-destructive/5 px-4 py-3 text-[13px] text-destructive">
                   {error}
                 </div>
               ) : null}
diff --git a/webui/src/components/settings/SettingsSidebar.tsx b/webui/src/components/settings/SettingsSidebar.tsx
index c271f762c..2c35235b3 100644
--- a/webui/src/components/settings/SettingsSidebar.tsx
+++ b/webui/src/components/settings/SettingsSidebar.tsx
@@ -102,7 +102,7 @@ export function SettingsSidebar({
             <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"
+              className="touch-target flex h-11 w-full items-center gap-2.5 rounded-control 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>
@@ -176,7 +176,7 @@ export function SettingsSidebar({
             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"
+            className="h-9 w-full justify-start gap-2 rounded-control 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")}
diff --git a/webui/src/components/settings/SkillsCatalogSettings.tsx b/webui/src/components/settings/SkillsCatalogSettings.tsx
index aa243ee5d..c8346ce7f 100644
--- a/webui/src/components/settings/SkillsCatalogSettings.tsx
+++ b/webui/src/components/settings/SkillsCatalogSettings.tsx
@@ -98,7 +98,7 @@ export function SkillsCatalogSettings({ skills }: { skills: SkillSummary[] }) {
       />
 
       {view === "installed" ? (
-        <section className="overflow-hidden rounded-[22px] bg-settings-surface">
+        <section className="overflow-hidden rounded-panel bg-settings-surface">
           <div className="flex flex-col gap-3 px-4 pb-2 pt-4 sm:flex-row sm:items-center sm:justify-between">
             <div className="relative w-full sm:max-w-[320px]">
               <Search
@@ -114,7 +114,7 @@ export function SkillsCatalogSettings({ skills }: { skills: SkillSummary[] }) {
                 aria-label={t("settings.skills.searchInstalled", {
                   defaultValue: "Search installed skills",
                 })}
-                className="h-9 rounded-[11px] bg-background pl-9 text-[13px]"
+                className="h-9 bg-background pl-9 text-[13px]"
               />
             </div>
             <SegmentedControl
@@ -220,7 +220,7 @@ function SkillCatalogRow({
       })}
       onClick={() => onSelect(skill)}
       className={cn(
-        "group flex w-full min-w-0 items-center gap-3 rounded-[14px] px-2 py-3 text-left",
+        "group flex w-full min-w-0 items-center gap-3 rounded-control px-2 py-3 text-left",
         "transition-colors duration-150",
         "hover:bg-muted/70",
         "focus-visible:bg-muted/70 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring",
@@ -436,7 +436,7 @@ function SkillDetailSheet({
                 {t("settings.skills.loadingDetail", { defaultValue: "Loading skill details..." })}
               </div>
             ) : loadFailed ? (
-              <div className="mt-8 rounded-[16px] bg-destructive/10 px-3 py-3 text-sm text-destructive">
+              <div className="mt-8 rounded-floating bg-destructive/10 px-3 py-3 text-sm text-destructive">
                 {t("settings.skills.loadFailed", { defaultValue: "Could not load skill details." })}
               </div>
             ) : (
@@ -484,7 +484,7 @@ function SkillDetailSheet({
                 </div>
 
                 {actionError ? (
-                  <div className="rounded-[14px] bg-destructive/10 px-3 py-2.5 text-[13px] text-destructive">
+                  <div className="rounded-control bg-destructive/10 px-3 py-2.5 text-[13px] text-destructive">
                     {actionError}
                   </div>
                 ) : null}
@@ -533,7 +533,7 @@ function SkillDetailSheet({
       </Sheet>
 
       <AlertDialog open={deleteOpen} onOpenChange={setDeleteOpen}>
-        <AlertDialogContent className="rounded-[20px]">
+        <AlertDialogContent>
           <AlertDialogHeader>
             <AlertDialogTitle>
               {t("settings.skills.deleteConfirmTitle", {
@@ -574,7 +574,7 @@ function RawInstructionsBlock({ markdown }: { markdown: string }) {
     });
 
   return (
-    <details className="group rounded-[18px] border border-border/45 bg-muted/20 px-3 py-3">
+    <details className="group rounded-floating border border-border/45 bg-muted/20 px-3 py-3">
       <summary className="flex min-h-11 cursor-pointer select-none items-center justify-between gap-3 text-[13px] font-medium text-foreground/90 transition-colors hover:text-foreground">
         <span>
           {t("settings.skills.instructionsTitle", { defaultValue: "Skill instructions" })}
@@ -583,7 +583,7 @@ function RawInstructionsBlock({ markdown }: { markdown: string }) {
           SKILL.md
         </code>
       </summary>
-      <div className="mt-3 overflow-hidden rounded-[14px] border border-border/35 bg-background/70">
+      <div className="mt-3 overflow-hidden rounded-control border border-border/35 bg-background/70">
         <pre
           className={cn(
             "max-h-[min(42vh,32rem)] overflow-auto overscroll-contain px-3.5 py-3 pr-4",
@@ -625,7 +625,7 @@ function RequirementsSection({
   };
 
   return (
-    <section className="rounded-[18px] border border-amber-500/20 bg-amber-500/[0.06] p-4">
+    <section className="rounded-floating border border-amber-500/20 bg-amber-500/[0.06] p-4">
       <div className="flex items-start gap-2.5">
         <CircleAlert
           className="mt-0.5 h-4 w-4 shrink-0 text-amber-700 dark:text-amber-300"
@@ -648,7 +648,7 @@ function RequirementsSection({
         {installOptions.map((option) => (
           <div
             key={`${option.id}:${option.command}`}
-            className="flex min-w-0 items-center gap-2 rounded-[12px] bg-background/80 px-3 py-2"
+            className="flex min-w-0 items-center gap-2 rounded-control bg-background/80 px-3 py-2"
           >
             <Terminal className="h-3.5 w-3.5 shrink-0 text-muted-foreground" aria-hidden />
             <code className="min-w-0 flex-1 overflow-x-auto whitespace-nowrap font-mono text-[11px] text-foreground/80">
@@ -661,7 +661,7 @@ function RequirementsSection({
               })}
               title={option.label}
               onClick={() => void copyCommand(option.command)}
-              className="flex h-9 w-9 shrink-0 items-center justify-center rounded-[9px] text-muted-foreground transition-colors hover:bg-muted hover:text-foreground sm:h-7 sm:w-7"
+              className="flex h-9 w-9 shrink-0 items-center justify-center rounded-control text-muted-foreground transition-colors hover:bg-muted hover:text-foreground sm:h-7 sm:w-7"
             >
               {copiedCommand === option.command ? (
                 <Check className="h-3.5 w-3.5 text-emerald-600" aria-hidden />
diff --git a/webui/src/components/settings/SkillsMarketplace.tsx b/webui/src/components/settings/SkillsMarketplace.tsx
index f13e982ae..aaf148ad1 100644
--- a/webui/src/components/settings/SkillsMarketplace.tsx
+++ b/webui/src/components/settings/SkillsMarketplace.tsx
@@ -208,7 +208,7 @@ export function SkillsMarketplace({
             aria-label={t("settings.skills.marketplaceSearchLabel", {
               defaultValue: "Search skills",
             })}
-            className="h-11 rounded-[14px] bg-settings-surface pl-9"
+            className="h-11 rounded-control bg-settings-surface pl-9"
           />
           {loading ? (
             <span
@@ -226,13 +226,13 @@ export function SkillsMarketplace({
       </div>
 
       {error ? (
-        <div className="rounded-[14px] bg-destructive/10 px-3 py-2.5 text-[13px] text-destructive">
+        <div className="rounded-control bg-destructive/10 px-3 py-2.5 text-[13px] text-destructive">
           {error}
         </div>
       ) : null}
 
       {query.trim().length < 2 ? (
-        <section className="overflow-hidden rounded-[22px] bg-settings-surface">
+        <section className="overflow-hidden rounded-panel bg-settings-surface">
           <div className="flex flex-col items-start gap-2 px-4 pb-2 pt-4 sm:flex-row sm:items-center sm:justify-between sm:px-5">
             <h2 className="text-[14px] font-semibold">
               {t("settings.skills.marketplaceTrendingTitle", {
@@ -271,14 +271,14 @@ export function SkillsMarketplace({
           )}
         </section>
       ) : !loading && visibleResults.length === 0 && !error ? (
-        <div className="rounded-[22px] bg-settings-surface px-5 py-12 text-center text-sm text-muted-foreground">
+        <div className="rounded-panel bg-settings-surface px-5 py-12 text-center text-sm text-muted-foreground">
           {t("settings.skills.marketplaceEmpty", {
             query: query.trim(),
             defaultValue: "No skills found for “{{query}}”.",
           })}
         </div>
       ) : (
-        <div className="overflow-hidden rounded-[22px] bg-settings-surface">
+        <div className="overflow-hidden rounded-panel bg-settings-surface">
           <MarketplaceSkillGroups
             skills={visibleResults}
             installedNames={installedNames}
@@ -296,9 +296,9 @@ export function SkillsMarketplace({
           if (!open) setSelected(null);
         }}
       >
-        <AlertDialogContent className="rounded-[20px]">
+        <AlertDialogContent>
           <AlertDialogHeader>
-            <div className="mb-1 flex h-10 w-10 items-center justify-center rounded-[12px] bg-amber-500/10 text-amber-700 dark:text-amber-300">
+            <div className="mb-1 flex h-10 w-10 items-center justify-center rounded-control bg-amber-500/10 text-amber-700 dark:text-amber-300">
               <ShieldAlert className="h-5 w-5" aria-hidden />
             </div>
             <AlertDialogTitle>
@@ -316,7 +316,7 @@ export function SkillsMarketplace({
                     "This third-party skill comes from {{provider}} ({{source}}) and may include instructions or executable scripts.",
                 })}
               </span>
-              <span className="flex flex-wrap items-center gap-2 rounded-md bg-muted px-2 py-1.5 text-[12px] text-foreground">
+              <span className="flex flex-wrap items-center gap-2 rounded-control bg-muted px-2 py-1.5 text-[12px] text-foreground">
                 {selected ? <ProviderMark provider={selected.provider} /> : null}
                 <code>{selected?.source}</code>
                 {selected?.version ? <span>v{selected.version}</span> : null}
diff --git a/webui/src/components/settings/TokenUsageHeatmap.tsx b/webui/src/components/settings/TokenUsageHeatmap.tsx
index 82b98eedf..816d6c190 100644
--- a/webui/src/components/settings/TokenUsageHeatmap.tsx
+++ b/webui/src/components/settings/TokenUsageHeatmap.tsx
@@ -224,7 +224,7 @@ export function TokenUsageHeatmap({
                     <span
                       aria-label={ariaLabel}
                       className={cn(
-                        "aspect-square w-full rounded-[2px] transition-transform hover:scale-110 sm:rounded-[4px]",
+                        "aspect-square w-full rounded-mark transition-transform hover:scale-110",
                         tokenUsageCellClass(level, cell.future),
                       )}
                     />
diff --git a/webui/src/components/settings/channels/ChannelIdentity.tsx b/webui/src/components/settings/channels/ChannelIdentity.tsx
index e947292e5..8f1757d6b 100644
--- a/webui/src/components/settings/channels/ChannelIdentity.tsx
+++ b/webui/src/components/settings/channels/ChannelIdentity.tsx
@@ -136,7 +136,7 @@ export function ChannelLogo({
   if (showBrandLogos && logoUrl) {
     return (
       <span
-        className="grid h-10 w-10 shrink-0 place-items-center rounded-[12px] bg-background"
+        className="grid h-10 w-10 shrink-0 place-items-center rounded-control bg-background"
       >
         <img
           src={logoUrl}
@@ -154,7 +154,7 @@ export function ChannelLogo({
   if (Icon) {
     return (
       <span
-        className="flex h-10 w-10 shrink-0 items-center justify-center rounded-[12px] bg-background"
+        className="flex h-10 w-10 shrink-0 items-center justify-center rounded-control bg-background"
         style={{ color }}
         aria-hidden
       >
@@ -165,7 +165,7 @@ export function ChannelLogo({
 
   return (
     <span
-      className="flex h-10 w-10 shrink-0 items-center justify-center rounded-[12px] bg-background text-[11px] font-bold"
+      className="flex h-10 w-10 shrink-0 items-center justify-center rounded-control bg-background text-[11px] font-bold"
       style={{ color }}
       aria-hidden
     >
@@ -275,7 +275,7 @@ export function ChannelRuntimeError({
 }) {
   if (!message) return null;
   return (
-    <div className={`${className} rounded-[12px] border border-destructive/20 bg-destructive/5 px-3 py-2 text-[12px] leading-5 text-destructive`}>
+    <div className={`${className} rounded-control border border-destructive/20 bg-destructive/5 px-3 py-2 text-[12px] leading-5 text-destructive`}>
       {message}
     </div>
   );
diff --git a/webui/src/components/settings/channels/ChannelInstancesPanel.tsx b/webui/src/components/settings/channels/ChannelInstancesPanel.tsx
index f8b1a6a01..442dec9c9 100644
--- a/webui/src/components/settings/channels/ChannelInstancesPanel.tsx
+++ b/webui/src/components/settings/channels/ChannelInstancesPanel.tsx
@@ -144,7 +144,7 @@ export function ChannelInstancesPanel({
   };
 
   return (
-    <aside className="min-h-full rounded-[20px] bg-settings-surface p-5">
+    <aside className="min-h-full rounded-panel bg-settings-surface p-5">
       <div className="flex items-start justify-between gap-3">
         <div className="flex min-w-0 items-start gap-3">
           <ChannelLogo feature={feature} showBrandLogos={showBrandLogos} />
@@ -177,7 +177,7 @@ export function ChannelInstancesPanel({
             <article
               key={instance.id}
               className={cn(
-                "overflow-hidden rounded-[18px] transition-colors",
+                "overflow-hidden rounded-floating transition-colors",
                 expanded
                   ? "bg-background"
                   : "bg-background/70 hover:bg-muted",
@@ -313,7 +313,7 @@ export function ChannelInstancesPanel({
       {customization.footer}
 
       {notice ? (
-        <div className="mt-3 rounded-[12px] border border-destructive/20 px-3 py-2 text-[12px] leading-5 text-destructive">
+        <div className="mt-3 rounded-control border border-destructive/20 px-3 py-2 text-[12px] leading-5 text-destructive">
           {notice}
         </div>
       ) : null}
diff --git a/webui/src/components/settings/channels/ChannelQrConnectFlow.tsx b/webui/src/components/settings/channels/ChannelQrConnectFlow.tsx
index 885b7fcf8..459440619 100644
--- a/webui/src/components/settings/channels/ChannelQrConnectFlow.tsx
+++ b/webui/src/components/settings/channels/ChannelQrConnectFlow.tsx
@@ -251,8 +251,8 @@ export function ChannelQrConnectFlow({
   return (
     <div className="mt-3 space-y-3">
       {pending ? (
-        <div className="grid gap-4 rounded-[14px] border border-border/70 p-4 sm:grid-cols-[auto_minmax(0,1fr)]">
-          <div className="grid h-[196px] w-[196px] place-items-center rounded-[14px] border border-border/60 bg-background">
+        <div className="grid gap-4 rounded-control border border-border/70 p-4 sm:grid-cols-[auto_minmax(0,1fr)]">
+          <div className="grid h-[196px] w-[196px] place-items-center rounded-control border border-border/60 bg-background">
             {qrDataUrl ? (
               <img
                 src={qrDataUrl}
@@ -293,20 +293,20 @@ export function ChannelQrConnectFlow({
       ) : null}
 
       {succeeded && !suppressSucceeded ? (
-        <div className="flex items-center gap-2 rounded-[12px] border border-emerald-500/20 px-3 py-2 text-[12px] font-medium text-emerald-700 dark:text-emerald-200">
+        <div className="flex items-center gap-2 rounded-control border border-emerald-500/20 px-3 py-2 text-[12px] font-medium text-emerald-700 dark:text-emerald-200">
           <Check className="h-3.5 w-3.5" aria-hidden />
           {displayMessage ?? labels.connected}
         </div>
       ) : null}
 
       {connect && ["expired", "failed", "cancelled"].includes(connect.status) ? (
-        <div className="rounded-[12px] border border-border/60 px-3 py-2 text-[12px] leading-5 text-muted-foreground">
+        <div className="rounded-control border border-border/60 px-3 py-2 text-[12px] leading-5 text-muted-foreground">
           {displayMessage || labels.stopped}
         </div>
       ) : null}
 
       {error ? (
-        <div className="rounded-[12px] border border-destructive/20 px-3 py-2 text-[12px] leading-5 text-destructive">
+        <div className="rounded-control border border-destructive/20 px-3 py-2 text-[12px] leading-5 text-destructive">
           {error}
         </div>
       ) : null}
diff --git a/webui/src/components/settings/channels/ChannelSetupPanel.tsx b/webui/src/components/settings/channels/ChannelSetupPanel.tsx
index 2f54be2a6..c5250b86c 100644
--- a/webui/src/components/settings/channels/ChannelSetupPanel.tsx
+++ b/webui/src/components/settings/channels/ChannelSetupPanel.tsx
@@ -87,7 +87,7 @@ export function ChannelCatalogRow({
       aria-pressed={selected}
       onClick={onSelect}
       className={cn(
-        "group flex w-full min-w-0 items-center gap-3 rounded-[14px] px-3 py-3 text-left transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-border/80",
+        "group flex w-full min-w-0 items-center gap-3 rounded-control px-3 py-3 text-left transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-border/80",
         selected ? "bg-background" : "hover:bg-muted",
       )}
     >
@@ -187,7 +187,7 @@ export function ChannelSetupPanel({
   });
 
   return (
-    <aside className="min-h-full rounded-[20px] bg-settings-surface p-5">
+    <aside className="min-h-full rounded-panel bg-settings-surface p-5">
       <div className="flex items-start justify-between gap-4">
         <div className="flex min-w-0 items-start gap-3">
           <ChannelLogo feature={feature} showBrandLogos={showBrandLogos} />
@@ -482,7 +482,7 @@ function ChannelSetupSurface({
               ) : null}
             </div>
             {setup.command ? (
-              <code className="mt-3 block rounded-[10px] border border-border/50 bg-muted/45 px-2.5 py-2 font-mono text-[11px] leading-5 text-foreground">
+              <code className="mt-3 block rounded-control border border-border/50 bg-muted/45 px-2.5 py-2 font-mono text-[11px] leading-5 text-foreground">
                 {setup.command}
               </code>
             ) : null}
@@ -538,7 +538,7 @@ function ChannelSetupSurface({
       {notice ? (
         <div
           role="status"
-          className="rounded-[12px] bg-muted/55 px-3 py-2.5 text-[12px] leading-5 text-muted-foreground"
+          className="rounded-control bg-muted/55 px-3 py-2.5 text-[12px] leading-5 text-muted-foreground"
         >
           {notice}
         </div>
diff --git a/webui/src/components/settings/channels/ChannelSetupParts.tsx b/webui/src/components/settings/channels/ChannelSetupParts.tsx
index 13be615d2..cb907f188 100644
--- a/webui/src/components/settings/channels/ChannelSetupParts.tsx
+++ b/webui/src/components/settings/channels/ChannelSetupParts.tsx
@@ -60,13 +60,13 @@ export function ChannelGuideLink({
         "inline-flex max-w-full items-center gap-2 bg-background/80 font-semibold text-foreground transition-colors hover:bg-background",
         compact
           ? "shrink-0 rounded-full py-1 pl-1 pr-2.5 text-[11.5px]"
-          : "mt-3 rounded-[12px] py-1.5 pl-1.5 pr-3 text-[12px]",
+          : "mt-3 rounded-control py-1.5 pl-1.5 pr-3 text-[12px]",
       )}
     >
       <span
         className={cn(
           "grid shrink-0 place-items-center overflow-hidden bg-muted/70 font-bold",
-          compact ? "h-5 w-5 rounded-full text-[9px]" : "h-6 w-6 rounded-[7px] text-[10px]",
+          compact ? "h-5 w-5 rounded-full text-[9px]" : "h-6 w-6 rounded-compact text-[10px]",
         )}
         style={{ color }}
         aria-hidden
@@ -231,7 +231,7 @@ export function ChannelProviderPresets({
       <div
         role="radiogroup"
         aria-label={t("settings.channels.providerPreset", { defaultValue: "Provider" })}
-        className="grid rounded-[10px] bg-muted p-0.5 text-[12px] font-medium text-muted-foreground"
+        className="grid rounded-control bg-muted p-0.5 text-[12px] font-medium text-muted-foreground"
         style={{ gridTemplateColumns: `repeat(${presets.length}, minmax(0, 1fr))` }}
       >
         {presets.map((preset) => (
@@ -245,7 +245,7 @@ export function ChannelProviderPresets({
               onApply(preset);
             }}
             className={cn(
-              "min-h-8 rounded-[8px] px-2 py-1.5 transition-colors hover:text-foreground",
+              "min-h-8 rounded-compact px-2 py-1.5 transition-colors hover:text-foreground",
               selected === preset.id && "bg-background text-foreground",
             )}
           >
@@ -370,7 +370,7 @@ export function ChannelSetupSteps({
         ))}
       </ol>
       {tryIt ? (
-        <div className="mt-3 rounded-[12px] bg-background/75 px-3 py-2 text-[12px] text-muted-foreground">
+        <div className="mt-3 rounded-control bg-background/75 px-3 py-2 text-[12px] text-muted-foreground">
           <span className="font-medium text-foreground">
             {tx("settings.channels.tryIt", "Try it")}
           </span>
diff --git a/webui/src/components/settings/channels/CredentialForm.tsx b/webui/src/components/settings/channels/CredentialForm.tsx
index 131c9c8be..30670a90c 100644
--- a/webui/src/components/settings/channels/CredentialForm.tsx
+++ b/webui/src/components/settings/channels/CredentialForm.tsx
@@ -159,7 +159,7 @@ export function CredentialForm({
               <span
                 role="radiogroup"
                 aria-label={field.label}
-                className="mt-1 grid rounded-[10px] bg-muted p-0.5 text-[12px] font-medium text-muted-foreground"
+                className="mt-1 grid rounded-control bg-muted p-0.5 text-[12px] font-medium text-muted-foreground"
                 style={{ gridTemplateColumns: `repeat(${field.options.length}, minmax(0, 1fr))` }}
               >
                 {field.options.map((option) => (
@@ -170,7 +170,7 @@ export function CredentialForm({
                     aria-checked={selectedOption === option.value}
                     onClick={() => onChange(field.key, option.value)}
                     className={cn(
-                      "min-h-8 rounded-[8px] px-2 py-1.5 transition-colors hover:text-foreground",
+                      "min-h-8 rounded-compact px-2 py-1.5 transition-colors hover:text-foreground",
                       selectedOption === option.value
                         && "bg-background text-foreground ring-1 ring-inset ring-border/45",
                     )}
@@ -200,7 +200,7 @@ export function CredentialForm({
                 value={values[field.key] ?? ""}
                 onChange={(event) => onChange(field.key, event.target.value)}
                 className={cn(
-                  "h-9 rounded-[10px] border-border/60 bg-muted/35 text-[13px]",
+                  "h-9 rounded-control border-border/60 bg-muted/35 text-[13px]",
                   showSecretToggle && "pr-9",
                 )}
               />
diff --git a/webui/src/components/settings/models/ModelsSettings.tsx b/webui/src/components/settings/models/ModelsSettings.tsx
index 1ccb5c8e0..3a44600c3 100644
--- a/webui/src/components/settings/models/ModelsSettings.tsx
+++ b/webui/src/components/settings/models/ModelsSettings.tsx
@@ -117,7 +117,7 @@ export function ModelPresetDeleteDialog({
     t(key, { defaultValue: fallback, ...(values ?? {}) });
   return (
     <Dialog open={preset !== null} onOpenChange={onOpenChange}>
-      <DialogContent className="max-w-[440px] rounded-[24px]">
+      <DialogContent className="max-w-[440px]">
         <DialogHeader className="text-left">
           <DialogTitle>
             {tx("settings.models.deletePresetTitle", "Delete model preset?")}
@@ -130,11 +130,10 @@ export function ModelPresetDeleteDialog({
             )}
           </DialogDescription>
         </DialogHeader>
-        <DialogFooter className="gap-2 sm:space-x-0">
+        <DialogFooter>
           <Button
             type="button"
             variant="ghost"
-            className="rounded-full"
             disabled={deleting}
             onClick={() => onOpenChange(false)}
           >
@@ -143,7 +142,6 @@ export function ModelPresetDeleteDialog({
           <Button
             type="button"
             variant="destructive"
-            className="rounded-full"
             disabled={deleting}
             onClick={onConfirm}
           >
@@ -343,7 +341,7 @@ export function ModelsSettings({
     <div
       id="model-preset-editor"
       data-testid="model-preset-editor"
-      className="mx-3 mb-3 divide-y divide-border/45 overflow-hidden rounded-[18px] border border-border/45 bg-background/80 shadow-sm motion-reduce:animate-none animate-in fade-in-0 slide-in-from-top-1 duration-200 sm:mx-5 lg:mx-auto lg:w-[calc(100%-2.5rem)] lg:max-w-6xl"
+      className="mx-3 mb-3 divide-y divide-border/45 overflow-hidden rounded-floating border border-border/45 bg-background/80 shadow-sm motion-reduce:animate-none animate-in fade-in-0 slide-in-from-top-1 duration-200 sm:mx-5 lg:mx-auto lg:w-[calc(100%-2.5rem)] lg:max-w-6xl"
     >
       {creating ? (
         <div className="flex min-h-[52px] items-center px-4 py-3 sm:px-5">
@@ -527,7 +525,7 @@ export function ModelsSettings({
           {!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">
+                <span className="grid h-9 w-9 shrink-0 place-items-center rounded-control bg-muted text-muted-foreground">
                   <ListOrdered className="h-4 w-4" aria-hidden />
                 </span>
                 <div className="min-w-0">
@@ -674,7 +672,7 @@ export function ModelsSettings({
                         aria-controls={isSelected ? "model-preset-editor" : undefined}
                         disabled={!preset}
                         onClick={() => preset && selectPreset(preset, key)}
-                        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"
+                        className="flex min-w-0 flex-1 items-center gap-3 rounded-control 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">
@@ -841,7 +839,7 @@ function ModelAdvancedFields({
               const value = Number(event.target.value);
               if (Number.isFinite(value)) onChange({ maxTokens: value });
             }}
-            className="h-9 rounded-[12px] text-[13px]"
+            className="h-9 text-[13px]"
           />
         </label>
         <label className="block">
@@ -858,7 +856,7 @@ function ModelAdvancedFields({
               const value = Number(event.target.value);
               if (Number.isFinite(value)) onChange({ temperature: value });
             }}
-            className="h-9 rounded-[12px] text-[13px]"
+            className="h-9 text-[13px]"
           />
         </label>
       </div>
@@ -887,7 +885,7 @@ function ModelAdvancedFields({
           placeholder={tx("settings.values.default", "Default")}
           autoCapitalize="none"
           spellCheck={false}
-          className="h-9 rounded-[12px] text-[13px]"
+          className="h-9 text-[13px]"
         />
       </label>
     </div>
diff --git a/webui/src/components/settings/models/ProviderSettings.tsx b/webui/src/components/settings/models/ProviderSettings.tsx
index fb83f707d..c8861bac3 100644
--- a/webui/src/components/settings/models/ProviderSettings.tsx
+++ b/webui/src/components/settings/models/ProviderSettings.tsx
@@ -276,7 +276,7 @@ export function ProviderOAuthLoginDialog({
         if (!open) onClose();
       }}
     >
-      <DialogContent className="w-[min(calc(100vw-2rem),28rem)] rounded-[24px]">
+      <DialogContent className="w-[min(calc(100vw-2rem),28rem)]">
         <form
           className="space-y-4"
           onSubmit={(event) => {
@@ -296,7 +296,7 @@ export function ProviderOAuthLoginDialog({
                   : 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">
+          <div className="flex items-center gap-2 rounded-control 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 />
             ) : (
@@ -341,12 +341,12 @@ export function ProviderOAuthLoginDialog({
           {error ? (
             <p
               role="alert"
-              className="rounded-[14px] border border-destructive/20 bg-destructive/5 px-3 py-2.5 text-[12px] text-destructive"
+              className="rounded-control 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">
+          <DialogFooter>
             <Button type="button" variant="outline" onClick={onOpenAuthorization}>
               <ExternalLink className="mr-2 h-4 w-4" aria-hidden />
               {expectsCallbackUrl
@@ -380,7 +380,7 @@ function ProviderRequestOptions({
   const tx = (key: string, fallback: string) => t(key, { defaultValue: fallback });
 
   return (
-    <div className="overflow-hidden rounded-[18px] border border-border/45 bg-background/75">
+    <div className="overflow-hidden rounded-floating border border-border/45 bg-background/75">
       {options.map((option, index) => {
         const title = tx(option.titleKey, option.title);
         const Icon = option.kind === "priority" ? Zap : Globe2;
@@ -599,7 +599,7 @@ function ProviderAdvancedOptions({
                   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]"
+                  className="min-h-[88px] resize-y bg-background font-mono text-[12px]"
                 />
               </label>
             ) : null}
@@ -613,7 +613,7 @@ function ProviderAdvancedOptions({
                   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]"
+                  className="min-h-[88px] resize-y bg-background font-mono text-[12px]"
                 />
               </label>
             ) : null}
@@ -627,7 +627,7 @@ function ProviderAdvancedOptions({
                   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]"
+                  className="min-h-[96px] resize-y bg-background font-mono text-[12px]"
                 />
               </label>
             ) : null}
@@ -825,7 +825,7 @@ export function ProvidersSettings({
             ) : 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="flex flex-col gap-3 rounded-floating 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")}
@@ -1240,7 +1240,7 @@ export function ProvidersSettings({
                   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">
+                    <span className="grid h-10 w-10 shrink-0 place-items-center rounded-control bg-muted text-muted-foreground">
                       <Plus className="h-5 w-5" aria-hidden />
                     </span>
                     <span className="truncate text-[15px] font-semibold text-foreground">
@@ -1334,7 +1334,7 @@ function ProviderIcon({
     return (
       <span
         data-testid={`provider-logo-${provider}`}
-        className="grid h-10 w-10 shrink-0 place-items-center overflow-hidden rounded-[14px] border border-border/45 bg-background"
+        className="grid h-10 w-10 shrink-0 place-items-center overflow-hidden rounded-control border border-border/45 bg-background"
       >
         <img
           src={logoUrl}
@@ -1352,7 +1352,7 @@ function ProviderIcon({
     return (
       <span
         data-testid={`provider-logo-fallback-${provider}`}
-        className="grid h-10 w-10 shrink-0 place-items-center rounded-[14px] text-[11px] font-semibold text-white"
+        className="grid h-10 w-10 shrink-0 place-items-center rounded-control text-[11px] font-semibold text-white"
         style={{ backgroundColor: brand.color }}
         aria-hidden
       >
diff --git a/webui/src/components/settings/overview/OverviewSettings.tsx b/webui/src/components/settings/overview/OverviewSettings.tsx
index 040e1cf8f..4914eec5d 100644
--- a/webui/src/components/settings/overview/OverviewSettings.tsx
+++ b/webui/src/components/settings/overview/OverviewSettings.tsx
@@ -129,7 +129,7 @@ export function OverviewSettings({
       : 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">
+      <section className="rounded-panel bg-settings-surface px-4 py-4 sm:px-5">
         <TokenUsageHeatmap usage={settings.usage} timeZone={settings.agent.timezone} />
       </section>
 
@@ -433,7 +433,7 @@ function OverviewRowIcon({
   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">
+    <span className="grid h-9 w-9 shrink-0 place-items-center rounded-control 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>
   );
diff --git a/webui/src/components/settings/shared/ModelControls.tsx b/webui/src/components/settings/shared/ModelControls.tsx
index 68bd7f8a7..54798c002 100644
--- a/webui/src/components/settings/shared/ModelControls.tsx
+++ b/webui/src/components/settings/shared/ModelControls.tsx
@@ -309,7 +309,7 @@ export function ModelIdPicker({
       key={model.id}
       {...navigation.getOptionProps(model.id)}
       className={cn(
-        "flex cursor-default items-center justify-between gap-2 rounded-[12px] px-2 py-1.5 text-[12px]",
+        "flex cursor-default items-center justify-between gap-2 rounded-control px-2 py-1.5 text-[12px]",
         options.selected && "text-foreground",
       )}
     >
@@ -455,7 +455,7 @@ export function ModelIdPicker({
                 ) : null}
                 <ComboboxOption
                   {...navigation.getOptionProps(customCandidate)}
-                  className="flex cursor-default items-center gap-2 rounded-[12px] px-2 py-1.5 text-[12px]"
+                  className="flex cursor-default items-center gap-2 rounded-control px-2 py-1.5 text-[12px]"
                 >
                   <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 />
diff --git a/webui/src/components/settings/shared/SettingsControls.tsx b/webui/src/components/settings/shared/SettingsControls.tsx
index d7d7e4c3d..d31bb52ca 100644
--- a/webui/src/components/settings/shared/SettingsControls.tsx
+++ b/webui/src/components/settings/shared/SettingsControls.tsx
@@ -31,7 +31,7 @@ export function CapabilityInstallNotice({
   installing?: boolean;
 }) {
   return (
-    <div className="flex items-start gap-3 rounded-[14px] border border-border/55 bg-muted/22 px-3.5 py-3">
+    <div className="flex items-start gap-3 rounded-control 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 />
       ) : (
@@ -78,13 +78,13 @@ export function NanobotFeatureInstallDialog({
             )}
           </DialogDescription>
         </DialogHeader>
-        <DialogFooter className="mt-7 !grid grid-cols-1 gap-3 space-x-0 sm:grid-cols-2 sm:space-x-0">
+        <DialogFooter className="mt-7 !grid grid-cols-1 gap-2 sm:grid-cols-2">
           <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"
+            className="h-11 w-full min-w-0 bg-muted/70 px-5 text-[15px] font-semibold text-foreground shadow-none hover:bg-muted"
           >
             {tx("settings.automations.cancel", "Cancel")}
           </Button>
@@ -92,7 +92,7 @@ export function NanobotFeatureInstallDialog({
             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"
+            className="h-11 w-full min-w-0 !whitespace-normal 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")}
@@ -117,7 +117,7 @@ export function DismissibleStatusMessage({
   return (
     <div
       className={cn(
-        "flex items-center justify-between gap-3 rounded-[12px] border py-2.5 pl-4 pr-2 text-[13px]",
+        "flex items-center justify-between gap-3 rounded-control 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",
@@ -153,7 +153,7 @@ export function RestartRequiredNotice({
 }) {
   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">
+    <div className="flex flex-col gap-3 rounded-control 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
@@ -186,7 +186,7 @@ export function SettingsSectionTitle({ children }: { children: ReactNode }) {
 
 export function SettingsGroup({ children }: { children: ReactNode }) {
   return (
-    <div className="overflow-hidden rounded-[22px] bg-settings-surface">
+    <div className="overflow-hidden rounded-panel bg-settings-surface">
       <div className="divide-y divide-border/45">{children}</div>
     </div>
   );
diff --git a/webui/src/components/settings/system/AppsSettings.tsx b/webui/src/components/settings/system/AppsSettings.tsx
index e5000d6de..5f8732739 100644
--- a/webui/src/components/settings/system/AppsSettings.tsx
+++ b/webui/src/components/settings/system/AppsSettings.tsx
@@ -256,7 +256,7 @@ export function AppsCatalogSettings({
               onChange={(event) => onQueryChange(event.target.value)}
               placeholder={tx("settings.apps.searchPlaceholder", "Search Apps")}
               className={cn(
-                "h-12 rounded-[14px] pl-11 text-[15px]",
+                "h-12 pl-11 text-[15px]",
                 SETTINGS_SEARCH_INPUT_CLASS,
               )}
             />
@@ -289,7 +289,7 @@ export function AppsCatalogSettings({
         />
       ) : null}
 
-      <section className="rounded-[22px] bg-settings-surface px-3 py-3 sm:px-4">
+      <section className="rounded-panel 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>
             {filter === "mcp"
@@ -412,7 +412,7 @@ function CliAppsCatalogRow({
   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">
+    <article className="apps-catalog-row group flex min-w-0 items-center gap-3 rounded-control 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">
@@ -583,7 +583,7 @@ function McpAppsCatalogRow({
   };
 
   return (
-    <article className="min-w-0 rounded-[14px] transition-colors hover:bg-muted/45">
+    <article className="min-w-0 rounded-control transition-colors hover:bg-muted/45">
       <div className="group flex min-w-0 flex-wrap items-center gap-x-3 gap-y-2 px-3 py-3">
         <McpPresetLogo preset={preset} showBrandLogos={showBrandLogos} />
         <div className="min-w-[8rem] flex-[1_1_8rem]">
@@ -747,7 +747,7 @@ function McpAppsCatalogRow({
 
       {manualCallback ? (
         <form
-          className="mx-3 mb-3 min-w-0 space-y-3 rounded-[14px] bg-background/55 p-3"
+          className="mx-3 mb-3 min-w-0 space-y-3 rounded-control bg-background/55 p-3"
           onSubmit={(event) => {
             event.preventDefault();
             onOAuthComplete();
@@ -825,7 +825,7 @@ function McpAppsCatalogRow({
           </div>
         </form>
       ) : oauthFlow && oauthPopupBlocked && oauthFlow.authorization_url ? (
-        <div className="mx-3 mb-3 flex flex-col gap-2.5 rounded-[14px] bg-background/55 p-3">
+        <div className="mx-3 mb-3 flex flex-col gap-2.5 rounded-control bg-background/55 p-3">
           <div className="flex min-w-0 items-center gap-2.5 text-[12.5px] text-muted-foreground">
             <span>
               {mcpOAuthStatusText(
@@ -1016,10 +1016,10 @@ function McpCustomServerPanel({
   ];
 
   return (
-    <section className="overflow-hidden rounded-[16px] bg-settings-surface">
+    <section className="overflow-hidden rounded-floating 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">
+          <span className="grid h-9 w-9 shrink-0 place-items-center rounded-control bg-muted text-muted-foreground">
             <Server className="h-4 w-4" aria-hidden />
           </span>
           <div className="min-w-0">
@@ -1154,7 +1154,7 @@ function McpCustomServerPanel({
                 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]"
+                className="min-h-[68px] resize-y bg-background/80 font-mono text-[12px]"
               />
               <p
                 id={headersHelpId}
@@ -1202,7 +1202,7 @@ function McpCustomServerPanel({
                     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]"
+                    className="min-h-[68px] resize-y bg-background/80 font-mono text-[12px]"
                   />
                 </label>
               ) : null}
@@ -1214,7 +1214,7 @@ function McpCustomServerPanel({
                   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]"
+                  className="min-h-[68px] resize-y bg-background/80 font-mono text-[12px]"
                 />
               </label>
               <label className="min-w-0">
@@ -1257,7 +1257,7 @@ function McpCustomServerPanel({
                 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]"
+                className="min-h-[84px] resize-y bg-background/80 font-mono text-[12px]"
               />
             </label>
             <Button
@@ -1352,7 +1352,7 @@ function McpPresetLogo({
       <span
         className={cn(
           "grid shrink-0 place-items-center border border-border/45 bg-background",
-          compact ? "h-10 w-10 rounded-[10px]" : "h-11 w-11 rounded-[8px]",
+          compact ? "h-10 w-10 rounded-control" : "h-11 w-11 rounded-compact",
         )}
       >
         <img
@@ -1372,8 +1372,8 @@ function McpPresetLogo({
       className={cn(
         "grid shrink-0 place-items-center font-semibold text-white",
         compact
-          ? "h-10 w-10 rounded-[10px] text-[12px]"
-          : "h-11 w-11 rounded-[8px] text-[13px]",
+          ? "h-10 w-10 rounded-control text-[12px]"
+          : "h-11 w-11 rounded-compact text-[13px]",
       )}
       style={{ backgroundColor: bg }}
     >
@@ -1406,7 +1406,7 @@ function CliAppReadyPanel({
   };
 
   return (
-    <section className="rounded-[12px] bg-settings-surface px-4 py-3">
+    <section className="rounded-control 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">
@@ -1472,7 +1472,7 @@ function CliAppLogo({ app, showBrandLogos }: { app: CliAppInfo; showBrandLogos:
 
   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"
+      className="relative grid h-11 w-11 shrink-0 place-items-center overflow-hidden rounded-compact border border-border/45 bg-muted text-[13px] font-semibold"
       style={{ color: app.brand_color || "hsl(var(--muted-foreground))" }}
     >
       <span
diff --git a/webui/src/components/settings/system/AutomationsSettings.tsx b/webui/src/components/settings/system/AutomationsSettings.tsx
index 9d00b0d8c..8a8367b5f 100644
--- a/webui/src/components/settings/system/AutomationsSettings.tsx
+++ b/webui/src/components/settings/system/AutomationsSettings.tsx
@@ -129,14 +129,14 @@ export function AutomationsSettings({
         <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">
+              <div className="grid w-full min-w-[36rem] grid-cols-5 gap-1 rounded-floating 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",
+                      "inline-flex h-8 min-w-0 shrink-0 items-center justify-center gap-2 whitespace-nowrap rounded-control 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),
                     )}
@@ -166,7 +166,7 @@ export function AutomationsSettings({
                     "Search task, message, linked chat, or schedule",
                   )}
                   className={cn(
-                    "h-9 w-full rounded-[13px] pl-9 text-[13px]",
+                    "h-9 w-full rounded-control pl-9 text-[13px]",
                     SETTINGS_SEARCH_INPUT_CLASS,
                   )}
                 />
@@ -175,7 +175,7 @@ export function AutomationsSettings({
                 <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"
+                    className="inline-flex h-9 min-w-[8.5rem] items-center justify-center gap-1.5 whitespace-nowrap rounded-control 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>
@@ -197,19 +197,19 @@ export function AutomationsSettings({
       ) : null}
 
       {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">
+        <div className="flex items-center gap-2 rounded-floating 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">
+        <div className="flex h-44 items-center justify-center rounded-panel 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">
+        <section className="grid min-h-0 overflow-hidden rounded-panel 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">
@@ -245,7 +245,7 @@ export function AutomationsSettings({
           />
         </section>
       ) : (
-        <div className="rounded-[22px] bg-settings-surface px-5 py-12 text-center text-[13px] text-muted-foreground">
+        <div className="rounded-panel 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.")
@@ -313,7 +313,7 @@ function AutomationListItem({
         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",
+          "group grid w-full grid-cols-[minmax(0,1fr)_auto] gap-3 rounded-floating 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",
@@ -433,7 +433,7 @@ function AutomationDetailPanel({
 
       <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">
+          <section className="rounded-floating 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}
@@ -506,7 +506,7 @@ function AutomationDetailPanel({
           </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">
+            <div className="rounded-floating border border-destructive/20 bg-destructive/8 px-3 py-2 text-[12px] leading-5 text-destructive">
               {job.state.last_error}
             </div>
           ) : null}
@@ -520,7 +520,7 @@ function AutomationDetailPanel({
             >
               {schedule}
             </AutomationDetail>
-            <div className="rounded-[18px] bg-background/55 p-3">
+            <div className="rounded-floating bg-background/55 p-3">
               <div className="grid gap-3">
                 {created ? (
                   <div>
@@ -672,7 +672,7 @@ function AutomationDetail({
   children: ReactNode;
 }) {
   return (
-    <div className="min-w-0 rounded-[17px] bg-background/55 px-3 py-3">
+    <div className="min-w-0 rounded-floating bg-background/55 px-3 py-3">
       <div className="text-[11px] font-medium leading-none text-muted-foreground/75">
         {label}
       </div>
@@ -757,7 +757,7 @@ export function AutomationEditDialog({
       {job ? (
         <DialogContent
           aria-describedby={undefined}
-          className="w-[min(calc(100vw-2rem),34rem)] rounded-[26px]"
+          className="w-[min(calc(100vw-2rem),34rem)]"
         >
           <form className="space-y-5" onSubmit={submit}>
             <DialogHeader>
@@ -772,7 +772,6 @@ export function AutomationEditDialog({
                 <Input
                   value={draft.name}
                   onChange={(event) => setDraft((prev) => ({ ...prev, name: event.target.value }))}
-                  className="h-10 rounded-[12px]"
                 />
               </label>
 
@@ -784,7 +783,7 @@ export function AutomationEditDialog({
                   <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"
+                    className="min-h-[160px] resize-none text-[13px] leading-5"
                   />
                 </label>
               ) : null}
@@ -821,7 +820,6 @@ export function AutomationEditDialog({
                       onChange={(event) =>
                         setDraft((prev) => ({ ...prev, everyValue: event.target.value }))
                       }
-                      className="h-10 rounded-[12px]"
                     />
                   </label>
                   <label className="block space-y-1.5">
@@ -837,7 +835,7 @@ export function AutomationEditDialog({
                         }))
                       }
                       className={cn(
-                        "h-10 w-full rounded-[12px] border border-input bg-background px-3 text-[13px] text-foreground transition-colors",
+                        "h-10 w-full rounded-control border border-input bg-background px-3 text-[13px] text-foreground transition-colors",
                         formControlFocusClassName,
                       )}
                     >
@@ -861,7 +859,7 @@ export function AutomationEditDialog({
                       value={draft.cronExpr}
                       onChange={(event) => setDraft((prev) => ({ ...prev, cronExpr: event.target.value }))}
                       placeholder="0 9 * * *"
-                      className="h-10 rounded-[12px] font-mono text-[13px]"
+                      className="font-mono text-[13px]"
                     />
                   </label>
                   <label className="block space-y-1.5">
@@ -872,7 +870,7 @@ export function AutomationEditDialog({
                       value={draft.tz}
                       onChange={(event) => setDraft((prev) => ({ ...prev, tz: event.target.value }))}
                       placeholder="Asia/Shanghai"
-                      className="h-10 rounded-[12px] text-[13px]"
+                      className="text-[13px]"
                     />
                   </label>
                 </div>
@@ -887,13 +885,12 @@ export function AutomationEditDialog({
                     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">
+                <div className="rounded-control bg-destructive/8 px-3 py-2 text-[12px] text-destructive">
                   {validation}
                 </div>
               ) : null}
@@ -905,11 +902,10 @@ export function AutomationEditDialog({
                 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">
+              <Button type="submit" disabled={Boolean(validation) || saving}>
                 {saving ? <Loader2 className="mr-2 h-4 w-4 animate-spin" aria-hidden /> : null}
                 {tx("settings.automations.save", "Save")}
               </Button>
@@ -937,7 +933,7 @@ export function AutomationDeleteDialog({
     t(key, { defaultValue: fallback, ...(values ?? {}) });
   return (
     <Dialog open={Boolean(job)} onOpenChange={onOpenChange}>
-      <DialogContent className="w-[min(calc(100vw-2rem),26rem)] rounded-[26px]">
+      <DialogContent className="w-[min(calc(100vw-2rem),26rem)]">
         <DialogHeader>
           <DialogTitle>{tx("settings.automations.deleteTitle", "Delete automation")}</DialogTitle>
           <DialogDescription>
@@ -954,7 +950,6 @@ export function AutomationDeleteDialog({
             variant="ghost"
             onClick={() => onOpenChange(false)}
             disabled={deleting}
-            className="rounded-full"
           >
             {tx("settings.automations.cancel", "Cancel")}
           </Button>
@@ -963,7 +958,6 @@ export function AutomationDeleteDialog({
             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")}
diff --git a/webui/src/components/settings/system/ChannelsSettings.tsx b/webui/src/components/settings/system/ChannelsSettings.tsx
index e8255873e..9b744847f 100644
--- a/webui/src/components/settings/system/ChannelsSettings.tsx
+++ b/webui/src/components/settings/system/ChannelsSettings.tsx
@@ -147,19 +147,19 @@ export function ChannelsSettings({
                 onChange={(event) => onQueryChange(event.target.value)}
                 placeholder={tx("settings.channels.searchPlaceholder", "Search channels")}
                 className={cn(
-                  "h-12 rounded-[14px] pl-11 text-[15px]",
+                  "h-12 rounded-control 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">
+            <div className="flex shrink-0 flex-wrap gap-1.5 rounded-control 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",
+                    "rounded-control px-3 py-1.5 text-[12px] font-medium transition-colors",
                     filter === option.value
                       ? "bg-background text-foreground"
                       : "text-muted-foreground hover:text-foreground",
diff --git a/webui/src/components/settings/system/McpManagementDialog.tsx b/webui/src/components/settings/system/McpManagementDialog.tsx
index ee8b12bdd..2ff2c1fc9 100644
--- a/webui/src/components/settings/system/McpManagementDialog.tsx
+++ b/webui/src/components/settings/system/McpManagementDialog.tsx
@@ -153,7 +153,6 @@ export function McpManagementDialog({
         showCloseButton={false}
         className={cn(
           "flex h-[min(34rem,calc(100dvh-2rem))] w-[calc(100vw-2rem)] max-w-[42rem] flex-col gap-0 overflow-hidden p-0",
-          "rounded-[22px]",
         )}
       >
         <div className="flex shrink-0 items-center gap-3 border-b border-border/45 px-5 py-3.5 sm:px-6">
@@ -282,7 +281,7 @@ function OverviewPanel({
   const previewTools = (preset.tool_names ?? []).slice(0, 4);
   return (
     <div className="space-y-4">
-      <section className="rounded-[16px] border border-border/55 px-4 py-3.5">
+      <section className="rounded-floating border border-border/55 px-4 py-3.5">
         <h3 className="text-[13px] font-semibold text-foreground">
           {tx("settings.mcp.about", "About this MCP")}
         </h3>
@@ -314,7 +313,7 @@ function OverviewPanel({
       </dl>
 
       {previewTools.length ? (
-        <section className="rounded-[16px] bg-muted/45 p-4">
+        <section className="rounded-floating bg-muted/45 p-4">
           <h3 className="text-[13px] font-semibold text-foreground">
             {tx("settings.mcp.toolPreview", "Tools")}
           </h3>
@@ -375,7 +374,7 @@ function ToolsPanel({
     return (
       <div
         className={cn(
-          "flex flex-col gap-3 rounded-[16px] border px-4 py-3.5 sm:flex-row sm:items-center sm:justify-between",
+          "flex flex-col gap-3 rounded-floating border px-4 py-3.5 sm:flex-row sm:items-center sm:justify-between",
           preset.error ? "border-destructive/25 bg-destructive/5" : "border-border/55 bg-muted/25",
         )}
       >
@@ -444,7 +443,7 @@ function ToolsPanel({
         </div>
       </div>
 
-      <div className="overflow-hidden rounded-[16px] border border-border/55">
+      <div className="overflow-hidden rounded-floating border border-border/55">
         {filteredTools.length ? filteredTools.map((toolName) => {
           const selected = selectedTools.has(toolName);
           return (
@@ -463,7 +462,7 @@ function ToolsPanel({
                 <span
                   aria-hidden
                   className={cn(
-                    "pointer-events-none absolute inset-0 grid place-items-center rounded-[7px] border transition-colors",
+                    "pointer-events-none absolute inset-0 grid place-items-center rounded-compact border transition-colors",
                     selected
                       ? "border-foreground bg-foreground text-background"
                       : "border-border bg-background text-transparent",
@@ -529,7 +528,7 @@ function ConnectionPanel({
         <h3 id={`mcp-connection-${preset.name}`} className="sr-only">
           {tx("settings.mcp.connectionDetails", "Connection details")}
         </h3>
-        <div className="rounded-[16px] bg-muted/40 px-4 py-3.5">
+        <div className="rounded-floating bg-muted/40 px-4 py-3.5">
           {preset.connection_summary ? (
             <div className="min-w-0">
               <p className="text-[12.5px] font-medium text-muted-foreground">{connectionLabel}</p>
@@ -580,7 +579,7 @@ function ConnectionPanel({
       </section>
 
       {preset.error ? (
-        <div role="alert" className="rounded-[14px] bg-destructive/10 px-3.5 py-3 text-[12.5px] leading-5 text-destructive">
+        <div role="alert" className="rounded-control bg-destructive/10 px-3.5 py-3 text-[12.5px] leading-5 text-destructive">
           {preset.error}
         </div>
       ) : null}
@@ -661,7 +660,7 @@ function ConnectionPanel({
 
 function MetricCard({ label, value }: { label: string; value: string }) {
   return (
-    <div className="min-w-0 rounded-[14px] bg-muted/45 px-3.5 py-3">
+    <div className="min-w-0 rounded-control bg-muted/45 px-3.5 py-3">
       <dt className="text-[12px] font-medium text-muted-foreground">{label}</dt>
       <dd className="mt-1 truncate text-[14px] font-semibold text-foreground">{value}</dd>
     </div>
diff --git a/webui/src/components/thread/AgentActivityCluster.tsx b/webui/src/components/thread/AgentActivityCluster.tsx
index a8db1a01b..00141d62d 100644
--- a/webui/src/components/thread/AgentActivityCluster.tsx
+++ b/webui/src/components/thread/AgentActivityCluster.tsx
@@ -1112,7 +1112,7 @@ function CliRunRow({ run, active, app }: { run: CliRunSummary; active: boolean;
         <span
           data-testid={`activity-cli-logo-${run.name.toLowerCase()}`}
           className={cn(
-            "grid h-4 w-4 shrink-0 place-items-center overflow-hidden rounded-[4px] border text-[6.5px] font-semibold text-white",
+            "grid h-4 w-4 shrink-0 place-items-center overflow-hidden rounded-mark border text-[6.5px] font-semibold text-white",
             rowActive && "animate-pulse",
           )}
           style={{
@@ -1190,7 +1190,7 @@ function McpRunRow({ run, active, preset }: { run: McpRunSummary; active: boolea
         <span
           data-testid={`activity-mcp-logo-${run.presetName.toLowerCase()}`}
           className={cn(
-            "grid h-4 w-4 shrink-0 place-items-center overflow-hidden rounded-[4px] border text-[6.5px] font-semibold text-white",
+            "grid h-4 w-4 shrink-0 place-items-center overflow-hidden rounded-mark border text-[6.5px] font-semibold text-white",
             rowActive && "animate-pulse",
           )}
           style={{
diff --git a/webui/src/components/thread/PromptRail.tsx b/webui/src/components/thread/PromptRail.tsx
index eaa0e4398..2f254fcb1 100644
--- a/webui/src/components/thread/PromptRail.tsx
+++ b/webui/src/components/thread/PromptRail.tsx
@@ -203,7 +203,7 @@ export function PromptRail({
               aria-hidden
               data-testid={previewVisible ? "prompt-rail-preview" : undefined}
               className={cn(
-                "pointer-events-none absolute left-10 z-30 w-[34rem] max-w-[calc(100vw-4rem)] -translate-y-1/2 rounded-[20px] px-4 py-3 text-left",
+                "pointer-events-none absolute left-10 z-30 w-[34rem] max-w-[calc(100vw-4rem)] -translate-y-1/2 rounded-panel px-4 py-3 text-left",
                 floatingSurfaceElevationClassName,
                 "transition-[opacity,transform] duration-150",
                 previewVisible
diff --git a/webui/src/components/thread/SessionInfoPopover.tsx b/webui/src/components/thread/SessionInfoPopover.tsx
index 3ef057522..09c354017 100644
--- a/webui/src/components/thread/SessionInfoPopover.tsx
+++ b/webui/src/components/thread/SessionInfoPopover.tsx
@@ -41,12 +41,12 @@ export function SessionInfoPopover({ sessionKey, token, title }: SessionInfoPopo
   const [open, setOpen] = useState(false);
   const { jobs, loading, loadFailed, now } = useSessionAutomationJobs(open, token, sessionKey);
   const automationContent = loading ? (
-    <div className="flex items-center gap-2 rounded-[16px] bg-muted/45 px-3 py-3 text-[12.5px] text-muted-foreground">
+    <div className="flex items-center gap-2 rounded-floating bg-muted/45 px-3 py-3 text-[12.5px] text-muted-foreground">
       <RefreshCcw className="h-3.5 w-3.5 animate-spin" />
       {t("thread.sessionInfo.loading")}
     </div>
   ) : loadFailed ? (
-    <div className="flex items-center gap-2 rounded-[16px] bg-destructive/10 px-3 py-3 text-[12.5px] text-destructive">
+    <div className="flex items-center gap-2 rounded-floating bg-destructive/10 px-3 py-3 text-[12.5px] text-destructive">
       <CircleAlert className="h-3.5 w-3.5" />
       {t("thread.sessionInfo.loadFailed")}
     </div>
@@ -57,7 +57,7 @@ export function SessionInfoPopover({ sessionKey, token, title }: SessionInfoPopo
       ))}
     </div>
   ) : (
-    <div className="rounded-[16px] bg-muted/35 px-3 py-3 text-[12.5px] leading-relaxed text-muted-foreground">
+    <div className="rounded-floating bg-muted/35 px-3 py-3 text-[12.5px] leading-relaxed text-muted-foreground">
       {t("thread.sessionInfo.empty")}
     </div>
   );
@@ -124,7 +124,7 @@ function AutomationRow({ job, now }: { job: SessionAutomationJob; now: number })
     : "bg-muted-foreground/35";
 
   return (
-    <div className="rounded-[16px] px-3 py-2.5 transition-colors hover:bg-muted/40">
+    <div className="rounded-floating px-3 py-2.5 transition-colors hover:bg-muted/40">
       <div className="flex items-start gap-2.5">
         <span className={cn("mt-1.5 h-1.5 w-1.5 shrink-0 rounded-full", statusClass)} />
         <div className="min-w-0 flex-1">
diff --git a/webui/src/components/thread/ThreadComposer.tsx b/webui/src/components/thread/ThreadComposer.tsx
index e31e86285..717729453 100644
--- a/webui/src/components/thread/ThreadComposer.tsx
+++ b/webui/src/components/thread/ThreadComposer.tsx
@@ -2246,8 +2246,8 @@ export function ThreadComposer({
         className={cn(
           "thread-composer-surface group/composer relative mx-auto flex w-full flex-col overflow-visible transition-all duration-200",
           isHero
-            ? "max-w-[58rem] rounded-[28px] bg-muted/30 focus-within:bg-muted/50 dark:bg-card dark:focus-within:bg-white/[0.06]"
-            : "max-w-[49.5rem] rounded-[22px] bg-muted/30 focus-within:bg-muted/50 dark:bg-card dark:focus-within:bg-white/[0.06]",
+            ? "max-w-[58rem] rounded-prominent bg-muted/30 focus-within:bg-muted/50 dark:bg-card dark:focus-within:bg-white/[0.06]"
+            : "max-w-[49.5rem] rounded-panel bg-muted/30 focus-within:bg-muted/50 dark:bg-card dark:focus-within:bg-white/[0.06]",
           interactionDisabled && "opacity-60",
           sessionDragPreview && "ring-1 ring-primary/25",
           isDragging && "ring-2 ring-primary/40 motion-reduce:ring-0 motion-reduce:border-primary",
@@ -2610,7 +2610,7 @@ function QueuedPromptStack({
       role="group"
       data-state="enter"
       className={cn(
-        "composer-status-strip relative z-20 mx-3 mt-3 overflow-hidden rounded-[18px]",
+        "composer-status-strip relative z-20 mx-3 mt-3 overflow-hidden rounded-floating",
         "border border-black/[0.05] bg-popover/90 p-1.5",
         "shadow-[0_10px_28px_rgba(15,23,42,0.07)] backdrop-blur-md",
         "dark:border-white/[0.08] dark:bg-popover/90 dark:shadow-[0_14px_34px_rgba(0,0,0,0.30)]",
@@ -2688,7 +2688,7 @@ function QueuedPromptRow({
       }}
       onDragEnd={onDragEnd}
       className={cn(
-        "queued-prompt-row group/queued flex min-h-8 items-center gap-1.5 rounded-[12px] px-2 py-0.5",
+        "queued-prompt-row group/queued flex min-h-8 items-center gap-1.5 rounded-control px-2 py-0.5",
         "text-[13px] transition-colors hover:bg-muted/55 dark:hover:bg-white/[0.055]",
         isHero && "text-[13.5px]",
       )}
@@ -2973,7 +2973,7 @@ function MentionCandidateLogo({
     return (
       <span
         className={cn(
-          "flex h-5 w-5 shrink-0 items-center justify-center overflow-hidden rounded-[5px]",
+          "flex h-5 w-5 shrink-0 items-center justify-center overflow-hidden rounded-compact",
           selected ? "bg-background/55" : "bg-transparent",
         )}
       >
@@ -2991,7 +2991,7 @@ function MentionCandidateLogo({
   }
   return (
     <span
-      className="flex h-5 w-5 shrink-0 items-center justify-center rounded-[5px] text-[7.5px] font-semibold text-white"
+      className="flex h-5 w-5 shrink-0 items-center justify-center rounded-compact text-[7.5px] font-semibold text-white"
       style={{ backgroundColor: color }}
     >
       {candidate.initials}
@@ -3135,7 +3135,7 @@ function AttachmentChip({
   return (
     <div
       className={cn(
-        "group relative flex items-center gap-2 rounded-[12px] border px-2 py-1.5",
+        "group relative flex items-center gap-2 rounded-control border px-2 py-1.5",
         "transition-colors motion-reduce:transition-none",
         tone,
       )}
diff --git a/webui/src/components/thread/WorkspaceControls.tsx b/webui/src/components/thread/WorkspaceControls.tsx
index 9ec0c9111..b2a87e3ea 100644
--- a/webui/src/components/thread/WorkspaceControls.tsx
+++ b/webui/src/components/thread/WorkspaceControls.tsx
@@ -221,7 +221,7 @@ export function WorkspaceProjectPicker({
               "flex min-h-[48px] w-full cursor-default gap-3 px-3 py-2.5 focus:bg-muted/55",
             )}
           >
-            <span className="grid h-8 w-8 shrink-0 place-items-center rounded-[12px] bg-muted text-foreground/80">
+            <span className="grid h-8 w-8 shrink-0 place-items-center rounded-control bg-muted text-foreground/80">
               <Folder className="h-4 w-4" />
             </span>
             <span className="min-w-0 flex-1">
@@ -328,7 +328,7 @@ export function WorkspaceAccessMenu({
           aria-label={accessAriaLabel}
           title={accessLabel}
           className={cn(
-            "thread-composer-access touch-target min-w-0 max-w-[min(12.5rem,42vw)] whitespace-nowrap rounded-[10px] border border-transparent font-semibold shadow-none",
+            "thread-composer-access touch-target min-w-0 max-w-[min(12.5rem,42vw)] whitespace-nowrap rounded-control border border-transparent font-semibold shadow-none",
             isHero ? "h-8 px-2.5 text-[12px]" : "h-9 px-3 text-[12.5px]",
             isFull
               ? "bg-transparent text-orange-600 hover:bg-orange-500/8 dark:text-orange-300 dark:hover:bg-orange-400/10"
diff --git a/webui/src/components/thread/activity/WebActivityRow.tsx b/webui/src/components/thread/activity/WebActivityRow.tsx
index 40f7ec530..cc0b5106b 100644
--- a/webui/src/components/thread/activity/WebActivityRow.tsx
+++ b/webui/src/components/thread/activity/WebActivityRow.tsx
@@ -61,7 +61,7 @@ function WebFavicon({ host, active }: { host: string; active: boolean }) {
     <img
       src={logoUrl}
       alt=""
-      className={`h-4 w-4 shrink-0 rounded-[3px] object-contain${active ? " animate-pulse" : ""}`}
+      className={`h-4 w-4 shrink-0 rounded-mark object-contain${active ? " animate-pulse" : ""}`}
       decoding="async"
       loading="lazy"
       referrerPolicy="no-referrer"
diff --git a/webui/src/components/ui/alert-dialog.tsx b/webui/src/components/ui/alert-dialog.tsx
index eaba81560..77d42d6d0 100644
--- a/webui/src/components/ui/alert-dialog.tsx
+++ b/webui/src/components/ui/alert-dialog.tsx
@@ -37,7 +37,7 @@ const AlertDialogContent = React.forwardRef<
         ref={ref}
         className={cn(
           modalSurfaceClassName,
-          "grid w-full max-w-lg origin-center gap-4 rounded-[22px] p-6 duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95",
+          "grid w-full max-w-lg origin-center gap-4 rounded-modal p-6 duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95",
           className,
         )}
         {...props}
@@ -64,7 +64,7 @@ const AlertDialogFooter = ({
 }: React.HTMLAttributes<HTMLDivElement>) => (
   <div
     className={cn(
-      "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
+      "flex flex-col-reverse gap-2 sm:flex-row sm:justify-end",
       className,
     )}
     {...props}
diff --git a/webui/src/components/ui/button.tsx b/webui/src/components/ui/button.tsx
index f656699b4..b03d56e7a 100644
--- a/webui/src/components/ui/button.tsx
+++ b/webui/src/components/ui/button.tsx
@@ -5,7 +5,7 @@ import { cva, type VariantProps } from "class-variance-authority";
 import { cn } from "@/lib/utils";
 
 const buttonVariants = cva(
-  "inline-flex items-center justify-center whitespace-nowrap rounded-md text-sm font-medium ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50",
+  "inline-flex items-center justify-center whitespace-nowrap rounded-control text-sm font-medium ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50",
   {
     variants: {
       variant: {
@@ -21,8 +21,8 @@ const buttonVariants = cva(
       },
       size: {
         default: "h-10 px-4 py-2",
-        sm: "h-9 rounded-md px-3",
-        lg: "h-11 rounded-md px-8",
+        sm: "h-9 px-3",
+        lg: "h-11 px-8",
         icon: "h-9 w-9",
       },
     },
diff --git a/webui/src/components/ui/dialog.tsx b/webui/src/components/ui/dialog.tsx
index a289133ba..63a5ec993 100644
--- a/webui/src/components/ui/dialog.tsx
+++ b/webui/src/components/ui/dialog.tsx
@@ -45,7 +45,7 @@ const DialogContent = React.forwardRef<
           ref={ref}
           className={cn(
             modalSurfaceClassName,
-            "grid w-full max-w-lg origin-center gap-4 rounded-[22px] p-6 duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95",
+            "grid w-full max-w-lg origin-center gap-4 rounded-modal p-6 duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95",
             className,
           )}
           {...props}
@@ -84,7 +84,7 @@ const DialogFooter = ({
 }: React.HTMLAttributes<HTMLDivElement>) => (
   <div
     className={cn(
-      "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
+      "flex flex-col-reverse gap-2 sm:flex-row sm:justify-end",
       className,
     )}
     {...props}
diff --git a/webui/src/components/ui/floating-surface.ts b/webui/src/components/ui/floating-surface.ts
index f29c84043..625926545 100644
--- a/webui/src/components/ui/floating-surface.ts
+++ b/webui/src/components/ui/floating-surface.ts
@@ -2,7 +2,7 @@ export const floatingSurfaceElevationClassName =
   "bg-popover text-popover-foreground shadow-[0_8px_24px_rgba(15,23,42,0.10)] dark:shadow-[0_12px_28px_rgba(0,0,0,0.32)]";
 
 export const floatingSurfaceVisualClassName =
-  `rounded-[18px] p-1.5 ${floatingSurfaceElevationClassName}`;
+  `rounded-floating p-1.5 ${floatingSurfaceElevationClassName}`;
 
 export const modalOverlayClassName =
   "fixed inset-0 z-50 bg-black/45 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0";
@@ -17,7 +17,7 @@ export const floatingSurfaceMotionClassName =
   "data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0";
 
 export const floatingItemClassName =
-  "relative flex min-h-8 select-none items-center gap-2 rounded-[12px] px-2.5 py-2 text-[13px] outline-none transition-colors [&>svg]:h-4 [&>svg]:w-4 [&>svg]:shrink-0";
+  "relative flex min-h-8 select-none items-center gap-2 rounded-control px-2.5 py-2 text-[13px] outline-none transition-colors [&>svg]:h-4 [&>svg]:w-4 [&>svg]:shrink-0";
 
 export const floatingItemFocusClassName =
   "focus:bg-foreground/[0.055] focus:text-foreground dark:focus:bg-white/[0.08]";
diff --git a/webui/src/components/ui/input.tsx b/webui/src/components/ui/input.tsx
index 7ddded8fd..593ec1ba4 100644
--- a/webui/src/components/ui/input.tsx
+++ b/webui/src/components/ui/input.tsx
@@ -11,7 +11,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
       <input
         type={type}
         className={cn(
-          "flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground disabled:cursor-not-allowed disabled:opacity-50",
+          "flex h-10 w-full rounded-control border border-input bg-background px-3 py-2 text-sm file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground disabled:cursor-not-allowed disabled:opacity-50",
           formControlFocusClassName,
           className,
         )}
diff --git a/webui/src/components/ui/textarea.tsx b/webui/src/components/ui/textarea.tsx
index 218c0ff4e..60c42d5fa 100644
--- a/webui/src/components/ui/textarea.tsx
+++ b/webui/src/components/ui/textarea.tsx
@@ -10,7 +10,7 @@ const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
     return (
       <textarea
         className={cn(
-          "flex min-h-[60px] w-full rounded-md border border-input bg-background px-3 py-2 text-sm placeholder:text-muted-foreground disabled:cursor-not-allowed disabled:opacity-50",
+          "flex min-h-[60px] w-full rounded-control border border-input bg-background px-3 py-2 text-sm placeholder:text-muted-foreground disabled:cursor-not-allowed disabled:opacity-50",
           formControlFocusClassName,
           className,
         )}
diff --git a/webui/src/components/ui/tooltip.tsx b/webui/src/components/ui/tooltip.tsx
index 631f7f270..8639e0189 100644
--- a/webui/src/components/ui/tooltip.tsx
+++ b/webui/src/components/ui/tooltip.tsx
@@ -18,7 +18,7 @@ const TooltipContent = React.forwardRef<
       sideOffset={sideOffset}
       className={cn(
         floatingSurfaceElevationClassName,
-        "z-50 overflow-hidden rounded-[10px] px-3 py-1.5 text-xs animate-in fade-in-0 zoom-in-95",
+        "z-50 overflow-hidden rounded-control px-3 py-1.5 text-xs animate-in fade-in-0 zoom-in-95",
         className,
       )}
       {...props}
diff --git a/webui/src/globals.css b/webui/src/globals.css
index d75c90978..3a4ccda76 100644
--- a/webui/src/globals.css
+++ b/webui/src/globals.css
@@ -38,6 +38,15 @@
     --temporary-foreground: 17 88% 32%;
     --temporary-border: 17 88% 40%;
     --radius: 0.4375rem;
+    /* Shared shape scale: marks, compact content, controls, and progressively larger surfaces. */
+    --radius-mark: 0.25rem;
+    --radius-compact: 0.5rem;
+    --radius-control: 0.75rem;
+    --radius-floating: 1.125rem;
+    --radius-panel: 1.375rem;
+    --radius-modal: 1.375rem;
+    --radius-prominent: 1.75rem;
+    --radius-pill: 9999px;
     --sidebar: 40 8% 96.8%;
     --sidebar-foreground: 0 0% 3.9%;
     --sidebar-selected: 40 1% 89.4%;
@@ -121,7 +130,7 @@
 
   *::-webkit-scrollbar-thumb {
     background-color: var(--scrollbar-thumb);
-    border-radius: 9999px;
+    border-radius: var(--radius-pill);
   }
 
   *::-webkit-scrollbar-thumb:hover {
@@ -567,7 +576,7 @@
   }
   .scrollbar-thin::-webkit-scrollbar-thumb {
     background-color: hsl(var(--muted-foreground) / 0.4);
-    border-radius: 9999px;
+    border-radius: var(--radius-pill);
   }
   .scrollbar-track-transparent {
     scrollbar-gutter: stable;
diff --git a/webui/src/tests/chat-list.test.tsx b/webui/src/tests/chat-list.test.tsx
index 8bc152c8c..1cf3bd7d0 100644
--- a/webui/src/tests/chat-list.test.tsx
+++ b/webui/src/tests/chat-list.test.tsx
@@ -493,7 +493,7 @@ describe("ChatList", () => {
     expect(tabSurface).toContainElement(paneList);
     const activePane = within(tabGroup).getByRole("button", { name: "Research pane" });
     expect(activePane).toHaveAttribute("aria-current", "true");
-    expect(activePane.closest("[data-sidebar-pane]")).toHaveClass("rounded-[0.65rem]");
+    expect(activePane.closest("[data-sidebar-pane]")).toHaveClass("rounded-control");
     expect(activePane.querySelector("[data-sidebar-selection-track]"))
       .toHaveAttribute("data-active", "true");
     expect(screen.getByRole("button", {
diff --git a/webui/src/tests/code-block.test.tsx b/webui/src/tests/code-block.test.tsx
index 65c19a13b..9c6f370ef 100644
--- a/webui/src/tests/code-block.test.tsx
+++ b/webui/src/tests/code-block.test.tsx
@@ -54,7 +54,7 @@ describe("CodeBlock", () => {
     expect(screen.getByTestId("plain-code-fallback")).toHaveClass("py-4", "pl-5", "pr-14");
 
     const container = screen.getByTestId("plain-code-fallback").closest(".not-prose");
-    expect(container).toHaveClass("relative", "rounded-[18px]", "bg-secondary/70");
+    expect(container).toHaveClass("relative", "rounded-floating", "bg-secondary/70");
     expect(container).not.toHaveClass("border");
     expect(container).toHaveAttribute("data-language", "ts");
 
diff --git a/webui/src/tests/message-bubble.test.tsx b/webui/src/tests/message-bubble.test.tsx
index fec359107..f8c7db701 100644
--- a/webui/src/tests/message-bubble.test.tsx
+++ b/webui/src/tests/message-bubble.test.tsx
@@ -108,7 +108,7 @@ describe("MessageBubble", () => {
     const pill = screen.getByText("hello");
 
     expect(row).toHaveClass("ml-auto", "flex");
-    expect(pill).toHaveClass("ml-auto", "w-fit", "rounded-[18px]");
+    expect(pill).toHaveClass("ml-auto", "w-fit", "rounded-floating");
     expect(screen.getByRole("button", { name: "Copy" })).toBeInTheDocument();
     expect(screen.queryByRole("button", { name: "Fork" })).not.toBeInTheDocument();
   });
@@ -286,7 +286,7 @@ describe("MessageBubble", () => {
     expect(command.getAttribute("style")).toContain("var(--inline-token-highlight)");
     expect(command.className).not.toMatch(/(?:^|\s)(?:bg-|border|ring|rounded)/);
     expect(command.parentElement).toHaveTextContent("/model gpt-5");
-    expect(command.parentElement).toHaveClass("rounded-[18px]", "bg-secondary/70");
+    expect(command.parentElement).toHaveClass("rounded-floating", "bg-secondary/70");
   });
 
   it("keeps unknown and invalid slash commands as plain message text", () => {
@@ -934,7 +934,7 @@ describe("MessageBubble", () => {
     const { container } = render(<MessageBubble message={message} />);
 
     const imageButton = screen.getByRole("button", { name: /view image/i });
-    expect(imageButton).toHaveClass("w-[min(100%,34rem)]", "rounded-[20px]");
+    expect(imageButton).toHaveClass("w-[min(100%,34rem)]", "rounded-panel");
     expect(imageButton).toHaveClass(
       "border",
       "border-border/60",
diff --git a/webui/src/tests/settings-models.test.tsx b/webui/src/tests/settings-models.test.tsx
index 9b56a4040..753283d84 100644
--- a/webui/src/tests/settings-models.test.tsx
+++ b/webui/src/tests/settings-models.test.tsx
@@ -165,7 +165,7 @@ describe("Settings models", () => {
     expect(editor).toHaveClass(
       "slide-in-from-top-1",
       "lg:max-w-6xl",
-      "rounded-[18px]",
+      "rounded-floating",
     );
     expect(within(editor).getByDisplayValue("Primary")).toBeInTheDocument();
     const deleteButton = within(editor).getByRole("button", { name: "Delete" });
diff --git a/webui/src/tests/thread-composer.test.tsx b/webui/src/tests/thread-composer.test.tsx
index c3aabea2e..8812301d3 100644
--- a/webui/src/tests/thread-composer.test.tsx
+++ b/webui/src/tests/thread-composer.test.tsx
@@ -554,7 +554,7 @@ describe("ThreadComposer", () => {
     expect(input.className).toContain("min-h-[50px]");
     expect(input.className).toContain("text-[16px]");
     expect(input.parentElement?.parentElement?.className).toContain("max-w-[49.5rem]");
-    expect(input.parentElement?.parentElement?.className).toContain("rounded-[22px]");
+    expect(input.parentElement?.parentElement?.className).toContain("rounded-panel");
     expect(input.parentElement?.parentElement?.className).not.toContain("shadow-");
     expect(screen.getByRole("button", { name: "Attach files" }).className).toContain("bg-card");
     expect(screen.getByRole("button", { name: "Send message" }).className).toContain("bg-foreground");
diff --git a/webui/src/tests/ui-shape-system.test.tsx b/webui/src/tests/ui-shape-system.test.tsx
new file mode 100644
index 000000000..8da887498
--- /dev/null
+++ b/webui/src/tests/ui-shape-system.test.tsx
@@ -0,0 +1,83 @@
+import { render, screen } from "@testing-library/react";
+import { describe, expect, it } from "vitest";
+
+import {
+  AlertDialog,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogTitle,
+} from "@/components/ui/alert-dialog";
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+
+describe("UI shape system", () => {
+  it("gives standard controls one shared radius", () => {
+    render(
+      <>
+        <Button>Continue</Button>
+        <Input aria-label="Name" />
+        <Textarea aria-label="Description" />
+      </>,
+    );
+
+    expect(screen.getByRole("button", { name: "Continue" })).toHaveClass("rounded-control");
+    expect(screen.getByRole("textbox", { name: "Name" })).toHaveClass("rounded-control");
+    expect(screen.getByRole("textbox", { name: "Description" })).toHaveClass(
+      "rounded-control",
+    );
+  });
+
+  it("gives dialogs and alert dialogs one shared modal radius", () => {
+    const dialog = render(
+      <Dialog open>
+        <DialogContent showCloseButton={false}>
+          <DialogTitle>Edit name</DialogTitle>
+          <DialogDescription>Choose a new name.</DialogDescription>
+        </DialogContent>
+      </Dialog>,
+    );
+    expect(screen.getByRole("dialog", { name: "Edit name" })).toHaveClass("rounded-modal");
+    dialog.unmount();
+
+    render(
+      <AlertDialog open>
+        <AlertDialogContent>
+          <AlertDialogTitle>Delete item?</AlertDialogTitle>
+          <AlertDialogDescription>This cannot be undone.</AlertDialogDescription>
+        </AlertDialogContent>
+      </AlertDialog>,
+    );
+    expect(screen.getByRole("alertdialog", { name: "Delete item?" })).toHaveClass(
+      "rounded-modal",
+    );
+  });
+
+  it("keeps floating surfaces and their items on the shared radius scale", () => {
+    render(
+      <DropdownMenu open>
+        <DropdownMenuTrigger>Open menu</DropdownMenuTrigger>
+        <DropdownMenuContent>
+          <DropdownMenuItem>Rename</DropdownMenuItem>
+        </DropdownMenuContent>
+      </DropdownMenu>,
+    );
+
+    expect(screen.getByRole("menu")).toHaveClass("rounded-floating");
+    expect(screen.getByRole("menuitem", { name: "Rename" })).toHaveClass(
+      "rounded-control",
+    );
+  });
+});
diff --git a/webui/tailwind.config.js b/webui/tailwind.config.js
index dd0387ef1..4d52bd073 100644
--- a/webui/tailwind.config.js
+++ b/webui/tailwind.config.js
@@ -51,6 +51,13 @@ export default {
         lg: "var(--radius)",
         md: "calc(var(--radius) - 2px)",
         sm: "calc(var(--radius) - 4px)",
+        mark: "var(--radius-mark)",
+        compact: "var(--radius-compact)",
+        control: "var(--radius-control)",
+        floating: "var(--radius-floating)",
+        panel: "var(--radius-panel)",
+        modal: "var(--radius-modal)",
+        prominent: "var(--radius-prominent)",
       },
       colors: {
         background: "hsl(var(--background))",