fix(tui): expose /exit in command menu

tui/src/app.test.ts

@@ -2106,6 +2106,36 @@ describe("NanobotTui layout", () => {
 
     expect(setup.renderer.isDestroyed).toBe(true)
   })
+
+  test("discovers and runs the local /exit command", async () => {
+    setup = await createRenderer({ width: 72, height: 20, screenMode: "alternate-screen" })
+    const sent: string[] = []
+    let closed = false
+    const transport = client(sent)
+    transport.close = () => { closed = true }
+    const app = NanobotTui.mount(
+      setup.renderer,
+      options,
+      transport,
+      new MockTreeSitterClient({ autoResolveTimeout: 0 }),
+    )
+    const ui = app as unknown as {
+      composer: TextareaRenderable
+      commandMenu: { visible: boolean }
+    }
+
+    await setup.mockInput.typeText("/exit")
+    await setup.flush()
+    expect(ui.commandMenu.visible).toBe(true)
+    expect(setup.captureCharFrame()).toContain("/exit")
+
+    expect(ui.composer.plainText).toBe("/exit")
+    ui.composer.submit()
+    await waitUntil(() => closed)
+
+    expect(sent).toEqual([])
+    expect(setup.renderer.isDestroyed).toBe(true)
+  })
 })
 
 describe("NanobotTui in a Herdr pane", () => {

tui/src/app.ts

@@ -194,6 +194,12 @@ const LOCAL_COMMANDS: TuiCommand[] = [
     description: "Continue from an earlier completed reply",
     action: "branch",
   },
+  {
+    command: "/exit",
+    title: "Exit",
+    description: "Close this terminal UI",
+    action: "exit",
+  },
 ]
 
 function syntaxStyle(palette: Palette): SyntaxStyle {
@@ -456,7 +462,9 @@ export class NanobotTui {
     this.palette = this.activeThemeMode === "light" ? LIGHT : DARK
     this.host = host
     this.localCommands = host.hosted
-      ? LOCAL_COMMANDS.filter(({ command }) => command === "/context" || command === "/diff")
+      ? LOCAL_COMMANDS.filter(({ command }) => (
+        command === "/context" || command === "/diff" || command === "/exit"
+      ))
       : LOCAL_COMMANDS
     this.transcript = new Transcript(
       renderer,
@@ -809,7 +817,7 @@ export class NanobotTui {
       return
     }
     if (!visibleContent) return
-    if (["exit", "quit", "/exit", "/quit", ":q"].includes(visibleContent.toLowerCase())) {
+    if (["exit", "quit", "/quit", ":q"].includes(visibleContent.toLowerCase())) {
       this.quit()
       return
     }
@@ -826,6 +834,7 @@ export class NanobotTui {
       else if (command.command.action === "context") void this.openContext()
       else if (command.command.action === "diff") this.openDiff()
       else if (command.command.action === "branch") void this.openBranch()
+      else if (command.command.action === "exit") this.quit()
       else this.startNewChat()
       return
     }

tui/src/command-menu.test.ts

@@ -93,6 +93,32 @@ describe("CommandMenu", () => {
     })
   })
 
+  test("discovers and completes the local exit action", async () => {
+    setup = await createTestRenderer({ width: 60, height: 12, screenMode: "alternate-screen" })
+    const menu = new CommandMenu(setup.renderer, {
+      text: "#FFFFFF",
+      muted: "#999999",
+      border: "#555555",
+    })
+    setup.renderer.root.add(menu.root)
+    menu.setCommands([], [{
+      command: "/exit",
+      title: "Exit",
+      description: "Close this terminal UI",
+      action: "exit",
+    }])
+
+    menu.update("/ex")
+    await setup.renderOnce()
+
+    expect(setup.captureCharFrame()).toContain("/exit")
+    expect(menu.completion("/ex")).toBe("/exit")
+    expect(menu.resolve("/exit")).toMatchObject({
+      source: "tui",
+      command: { action: "exit" },
+    })
+  })
+
   test("resolves argument-sensitive command lifecycles", () => {
     const goal: SlashCommand = {
       command: "/goal",

tui/src/command-menu.ts

@@ -5,7 +5,7 @@ import { PickerMenu, type PickerMenuTheme } from "./picker-menu"
 
 export type CommandMenuTheme = PickerMenuTheme
 
-export type TuiCommandAction = "sessions" | "new-chat" | "context" | "diff" | "branch"
+export type TuiCommandAction = "sessions" | "new-chat" | "context" | "diff" | "branch" | "exit"
 
 export interface TuiCommand {
   command: string