diff --git a/apps/ai-game-creator-shell/src/services/errorReporting.ts b/apps/ai-game-creator-shell/src/services/errorReporting.ts
index 5f8ed9bed..0a1648098 100644
--- a/apps/ai-game-creator-shell/src/services/errorReporting.ts
+++ b/apps/ai-game-creator-shell/src/services/errorReporting.ts
@@ -143,10 +143,16 @@ export function subscribeClientErrorEvents(listener: () => void) {
   let unlisten: (() => void) | undefined;
   void subscribeErrorReportUpdates(() => {
     if (!disposed) listener();
-  }).then((stop) => {
-    if (disposed) stop();
-    else unlisten = stop;
-  });
+  })
+    .then((stop) => {
+      if (disposed) stop();
+      else unlisten = stop;
+    })
+    .catch(() => {
+      // Browser previews and partially initialized native webviews do not have
+      // an event bridge; snapshots and focus/visibility refreshes remain the
+      // source of truth in those environments.
+    });
   return () => {
     disposed = true;
     unlisten?.();
diff --git a/apps/ai-game-creator-shell/src/services/errorReportingBridge.ts b/apps/ai-game-creator-shell/src/services/errorReportingBridge.ts
index afbb503d3..1e36fb9ee 100644
--- a/apps/ai-game-creator-shell/src/services/errorReportingBridge.ts
+++ b/apps/ai-game-creator-shell/src/services/errorReportingBridge.ts
@@ -31,8 +31,33 @@ export function ackErrorReports(eventIds: string[]) {
 export function subscribeErrorReportUpdates(
   listener: () => void,
 ): Promise<UnlistenFn> {
-  return listen<ErrorReportUpdate>('error-report-updated', (event) => {
+  const handleUpdate = (event: { payload: ErrorReportUpdate }) => {
     void event.payload;
     listener();
-  });
+  };
+
+  // 客户端也会运行在浏览器预览和 Vitest 的 jsdom 中。Tauri API 模块默认
+  // `__TAURI_INTERNALS__` 已存在，缺失时会拒绝，因此原生 WebView 之外保持
+  // 桥接为空操作。启用 `withGlobalTauri` 时优先使用全局桥接，让测试替身与
+  // 客户端其它事件订阅复用同一入口。
+  if (typeof window !== 'undefined') {
+    const globalListen = window.__TAURI__?.event?.listen;
+    if (globalListen) {
+      return globalListen('error-report-updated', handleUpdate).catch(
+        () => () => {},
+      );
+    }
+
+    const internals = (window as Window & { __TAURI_INTERNALS__?: unknown })
+      .__TAURI_INTERNALS__;
+    if (!internals) {
+      return Promise.resolve(() => {});
+    }
+  } else {
+    return Promise.resolve(() => {});
+  }
+
+  return listen<ErrorReportUpdate>('error-report-updated', handleUpdate).catch(
+    () => () => {},
+  );
 }
diff --git a/apps/ai-game-creator-shell/tests/errorReporting.test.ts b/apps/ai-game-creator-shell/tests/errorReporting.test.ts
index 7554032b0..4fb1747c9 100644
--- a/apps/ai-game-creator-shell/tests/errorReporting.test.ts
+++ b/apps/ai-game-creator-shell/tests/errorReporting.test.ts
@@ -89,6 +89,7 @@ import {
   resetClientErrorEventsForTests,
   shouldCaptureClientError,
   submitErrorReportBatch,
+  subscribeClientErrorEvents,
 } from '../src/services/errorReporting';
 
 describe('客户端错误报告池', () => {
@@ -184,4 +185,12 @@ describe('客户端错误报告池', () => {
     uninstall();
     consoleInfo.mockRestore();
   });
+
+  it('浏览器预览中订阅错误事件不会产生未处理拒绝', async () => {
+    delete window.__TAURI__;
+
+    const unsubscribe = subscribeClientErrorEvents(vi.fn());
+    unsubscribe();
+    await Promise.resolve();
+  });
 });
diff --git a/docs/project-memory/shared-memory/pitfalls.md b/docs/project-memory/shared-memory/pitfalls.md
index 459cafb65..e2e02cb8c 100644
--- a/docs/project-memory/shared-memory/pitfalls.md
+++ b/docs/project-memory/shared-memory/pitfalls.md
@@ -2,6 +2,13 @@
 
 > 当前口径：本文件保留可复用的排障经验；历史条目的旧路由、旧版本和已删除文档仅作根因背景，不得据此恢复退役入口。当前命令、路由和 schema 以代码与 `docs/README.md` 为准。
 
+## 2026-09-02 Tauri 事件桥在浏览器预览中必须 fail-safe
+
+- **现象**：Vitest/jsdom 挂载 AGC 客户端时，错误报告通知调用 `@tauri-apps/api/event.listen`，因缺少 `window.__TAURI_INTERNALS__` 产生未处理拒绝；测试断言虽通过，CI 仍以 unhandled errors 失败。
+- **原因**：错误报告订阅是非阻塞唤醒通道，不能假定所有渲染环境都已初始化 Tauri IPC；模块级 `listen` 在 API 调用前就会访问 `transformCallback`，仅在调用方包一层 `.then` 无法消除该环境差异。
+- **处理**：订阅桥先复用 `window.__TAURI__.event.listen`（含 globalTauri/native shim），其次仅在 `__TAURI_INTERNALS__` 存在时调用模块 API；浏览器预览或订阅失败统一返回 no-op，并在消费层收口 rejection。错误快照读取、焦点和可见性刷新仍是权威路径。
+- **验证**：`errorReporting.test.ts` 覆盖无 Tauri 环境无未处理拒绝；`appSurface.test.ts` 全部 385 条用例通过且无 Vitest unhandled errors。
+
 ## 2026-08-27 Provider 成功 handoff 失败时需要保留本地私有原始响应
 
 - **现象**：Provider 已返回响应，但 tool-plan handoff 因绝对路径或其它内容安全校验失败，Runtime 只留下 `failureKind`、哈希和被压平的 JSON pointer；排障时无法确认实际工具名和完整 arguments。