fix(typing): keep tool-start ttl mode-safe (#452, thanks @thesash)

src/auto-reply/reply/test-helpers.ts

@@ -2,14 +2,18 @@ import { vi } from "vitest";
 
 import type { TypingController } from "./typing.js";
 
-export function createMockTypingController(): TypingController {
+export function createMockTypingController(
+  overrides: Partial<TypingController> = {},
+): TypingController {
   return {
     onReplyStart: vi.fn(async () => {}),
     startTypingLoop: vi.fn(async () => {}),
     startTypingOnText: vi.fn(async () => {}),
     refreshTypingTtl: vi.fn(),
+    isActive: vi.fn(() => false),
     markRunComplete: vi.fn(),
     markDispatchIdle: vi.fn(),
     cleanup: vi.fn(),
+    ...overrides,
   };
 }