fix(tui): close cross-platform lifecycle races

tui/src/app.test.ts

@@ -22,6 +22,11 @@ function occurrences(frame: string, value: string): number {
   return frame.split(value).length - 1
 }
 
+async function waitUntil(predicate: () => boolean, timeout = 250): Promise<void> {
+  const deadline = Date.now() + timeout
+  while (!predicate() && Date.now() < deadline) await Bun.sleep(5)
+}
+
 function client(sent: string[] = []) {
   return {
     activeChatId: "chat",
@@ -113,7 +118,7 @@ describe("NanobotTui layout", () => {
     composer.setText("你")
     composer.submit()
     setTimeout(() => composer.setText("你好"), 0)
-    await Bun.sleep(10)
+    await waitUntil(() => sent.length > 0)
 
     expect(sent).toEqual(["你好"])
   })

tui/src/app.ts

@@ -164,6 +164,7 @@ export class NanobotTui {
   private shimmerFrame = 0
   private shimmerTimer: ReturnType<typeof setInterval> | null = null
   private submitPending = false
+  private submitGeneration = 0
   private readonly promptHistory: string[] = []
   private historyCursor = 0
   private historyDraft = ""
@@ -311,14 +312,17 @@ export class NanobotTui {
   private deferSubmit(): void {
     if (this.submitPending) return
     this.submitPending = true
+    const generation = ++this.submitGeneration
     setTimeout(() => setTimeout(() => {
+      if (generation !== this.submitGeneration) return
       this.submitPending = false
+      if (this.composer.isDestroyed) return
       this.submit()
     }, 0), 0)
   }
 
   private submit(): void {
-    if (this.quitting) return
+    if (this.quitting || this.composer.isDestroyed) return
     const content = this.composer.plainText.trim()
     if (!content) return
     if (!this.ready) {
@@ -658,6 +662,8 @@ export class NanobotTui {
   private quit(): void {
     if (this.quitting) return
     this.quitting = true
+    this.submitGeneration += 1
+    this.submitPending = false
     this.client.close()
     this.renderer.destroy()
   }

tui/src/index.ts

@@ -17,17 +17,20 @@ const options: AppOptions = {
   access: process.env.NANOBOT_TUI_ACCESS?.trim() || "workspace access",
 }
 
-const app = await NanobotTui.create(options)
+let app: NanobotTui | undefined
+let shuttingDown = false
 
 const shutdown = (code = 0) => {
-  app.stop()
+  if (shuttingDown) return
+  shuttingDown = true
+  app?.stop()
   process.exitCode = code
 }
 
 for (const signal of ["SIGHUP", "SIGINT", "SIGTERM"] as const) {
   process.once(signal, () => shutdown())
 }
-process.once("exit", () => app.stop())
+process.once("exit", () => app?.stop())
 process.once("uncaughtException", (error) => {
   shutdown(1)
   process.stderr.write(`${error instanceof Error ? error.stack || error.message : String(error)}\n`)
@@ -37,4 +40,6 @@ process.once("unhandledRejection", (error) => {
   process.stderr.write(`${error instanceof Error ? error.stack || error.message : String(error)}\n`)
 })
 
-app.start()
+app = await NanobotTui.create(options)
+if (shuttingDown) app.stop()
+else app.start()