refactor(tui): simplify session rows

tui/src/app.ts

@@ -2147,7 +2147,12 @@ export class NanobotTui {
         this.updateTitle()
       }
       const limit = this.renderer.height >= 20 ? 8 : 4
-      this.sessionMenu.open(sessions, this.client.activeChatId, limit)
+      this.sessionMenu.open(
+        sessions,
+        this.client.activeChatId,
+        limit,
+        this.defaultModelPreset,
+      )
       this.startSessionRefresh()
       this.renderTitleColor()
       this.sessionMenu.update(this.composer.plainText, limit)
@@ -2361,7 +2366,11 @@ export class NanobotTui {
         this.apiReauthenticator,
       )
       if (this.quitting || loadId !== this.sessionLoadId || !this.sessionMenu.visible) return
-      this.sessionMenu.replace(sessions, this.client.activeChatId)
+      this.sessionMenu.replace(
+        sessions,
+        this.client.activeChatId,
+        this.defaultModelPreset,
+      )
       this.status.content = sessions.length ? `${sessions.length} sessions` : "No saved sessions"
     } catch {
       // Keep the existing picker usable during a transient refresh failure.

tui/src/session-menu.test.ts

@@ -52,10 +52,12 @@ describe("SessionMenu", () => {
       warning: "#F5C451",
     })
     setup.renderer.root.add(menu.root)
-    menu.open(sessions, "one", 6)
+    menu.open(sessions, "one", 6, "Codex")
     await setup.renderOnce()
 
     expect(setup.captureCharFrame()).toContain("› ● API migration")
+    expect(setup.captureCharFrame()).not.toContain("Move authentication")
+    expect(setup.captureCharFrame()).not.toContain("Codex")
     expect(menu.choose()?.chatId).toBe("one")
 
     menu.update("release stable", 6)
@@ -231,4 +233,31 @@ describe("SessionMenu", () => {
     expect(duplicates).toContain("frontend/nanobot")
     expect(duplicates).toContain("backend/nanobot")
   })
+
+  test("shows only model overrides and keeps previews searchable", async () => {
+    setup = await createTestRenderer({ width: 80, height: 18, screenMode: "alternate-screen" })
+    const menu = new SessionMenu(setup.renderer, {
+      text: "#FFFFFF",
+      muted: "#999999",
+      border: "#555555",
+      accent: "#FF8A33",
+      warning: "#F5C451",
+    })
+    setup.renderer.root.add(menu.root)
+
+    menu.open(sessions, "one", 6, "Codex")
+    await setup.renderOnce()
+    const frame = setup.captureCharFrame()
+    expect(frame).not.toContain("Codex")
+    expect(frame).not.toContain("Prepare the stable release")
+
+    menu.update("prepare stable", 6)
+    await setup.renderOnce()
+    expect(menu.choose()?.chatId).toBe("two")
+
+    menu.replace([{ ...sessions[1]!, modelPreset: "Deep Research" }], "one", "Codex")
+    await setup.renderOnce()
+    expect(setup.captureCharFrame()).toContain("Deep Research")
+    menu.hide()
+  })
 })

tui/src/session-menu.ts

@@ -32,6 +32,7 @@ export class SessionMenu {
   private spinnerFrame = 0
   private spinnerTimer: ReturnType<typeof setInterval> | null = null
   private rows: SessionMenuRow[] = []
+  private defaultModelPreset = ""
   private readonly snapshots = new Map<string, {
     preview: string
     runStartedAt: number | null
@@ -58,12 +59,9 @@ export class SessionMenu {
       ].join(" "),
       render: (session, selected) => {
         const age = updatedLabel(session.updatedAt)
-        const preview = session.preview.trim()
         const detail = [
           this.showWorkspaces ? this.workspaceLabel(session) : "",
-          session.modelPreset,
-          age,
-          preview && preview !== sessionLabel(session) ? preview : "",
+          this.modelOverride(session),
         ]
           .filter(Boolean)
           .join(" · ")
@@ -73,7 +71,9 @@ export class SessionMenu {
           : selected ? this.theme.text : this.theme.muted
         return [
           ...(marker ? [chunk(`${marker.text} `, marker.color)] : []),
-          chunk(`${sessionLabel(session)}${detail ? `  ${detail}` : ""}`, foreground),
+          chunk(sessionLabel(session), foreground),
+          ...(detail ? [chunk(`  ${detail}`, this.theme.muted)] : []),
+          ...(age ? [chunk(`  ${age}`, this.theme.muted)] : []),
         ]
       },
       emptyText: "No matching sessions",
@@ -86,14 +86,25 @@ export class SessionMenu {
     return this.picker.visible
   }
 
-  open(sessions: SessionSummary[], currentChatId: string, limit: number): void {
+  open(
+    sessions: SessionSummary[],
+    currentChatId: string,
+    limit: number,
+    defaultModelPreset = "",
+  ): void {
+    this.defaultModelPreset = defaultModelPreset
     this.observe(sessions, currentChatId)
     this.rows = this.prepareRows(sessions, currentChatId)
     this.picker.show(this.rows, "", limit)
     this.syncSpinner()
   }
 
-  replace(sessions: SessionSummary[], currentChatId: string): void {
+  replace(
+    sessions: SessionSummary[],
+    currentChatId: string,
+    defaultModelPreset = this.defaultModelPreset,
+  ): void {
+    this.defaultModelPreset = defaultModelPreset
     this.observe(sessions, currentChatId)
     this.rows = this.prepareRows(sessions, currentChatId)
     this.picker.replace(this.rows)
@@ -236,6 +247,11 @@ export class SessionMenu {
   private workspaceLabel(session: SessionSummary): string {
     return this.workspaceLabels.get(normalizeWorkspacePath(session.workspaceScope?.project_path)) || ""
   }
+
+  private modelOverride(session: SessionSummary): string {
+    const preset = session.modelPreset?.trim() || ""
+    return preset && preset !== this.defaultModelPreset ? preset : ""
+  }
 }
 
 function chunk(text: string, color: string): TextChunk {