refactor: centralize typing mode signals

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

@@ -0,0 +1,15 @@
+import { vi } from "vitest";
+
+import type { TypingController } from "./typing.js";
+
+export function createMockTypingController(): TypingController {
+  return {
+    onReplyStart: vi.fn(async () => {}),
+    startTypingLoop: vi.fn(async () => {}),
+    startTypingOnText: vi.fn(async () => {}),
+    refreshTypingTtl: vi.fn(),
+    markRunComplete: vi.fn(),
+    markDispatchIdle: vi.fn(),
+    cleanup: vi.fn(),
+  };
+}