diff --git a/apps/ai-game-creator-shell/src/view/project-development/chat/controller/useDirectProjectChatController.test.tsx b/apps/ai-game-creator-shell/src/view/project-development/chat/controller/useDirectProjectChatController.test.tsx
index 1b9999c58..8e41a0c5c 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/chat/controller/useDirectProjectChatController.test.tsx
+++ b/apps/ai-game-creator-shell/src/view/project-development/chat/controller/useDirectProjectChatController.test.tsx
@@ -2,6 +2,7 @@
 import { act, cleanup, renderHook, waitFor } from '@testing-library/react';
 import { afterEach, describe, expect, it, vi } from 'vitest';
 
+import type { TauriInvoke } from '../../../../app/types';
 import type { HistorySlice } from '../generated/HistorySlice';
 import type { ThreadItem } from '../generated/ThreadItem';
 import { useDirectProjectChatController } from './useDirectProjectChatController';
@@ -32,6 +33,7 @@ function slice(
  */
 function installDeferredHistoryInvoke() {
   const requests: SliceRequest[] = [];
+  // `vi.fn` 的返回类型是固定签名，装不进 `window.__TAURI__.core.invoke` 的泛型签名，这里显式转换。
   const invoke = vi.fn(
     async (command: string, args?: Record<string, unknown>) => {
       if (command !== 'read_direct_project_history_slice') return undefined;
@@ -44,7 +46,7 @@ function installDeferredHistoryInvoke() {
         });
       });
     },
-  );
+  ) as unknown as TauriInvoke;
   window.__TAURI__ = { core: { invoke } };
   return {
     /** 取出一条挂起的读取；没有就等到出现为止。 */