fix: 修复桌面 DOCX 媒体捕获超时

apps/desktop/tests/electron-docx-media-capture.test.ts

@@ -104,4 +104,52 @@ describe("Electron DOCX 媒体捕获", () => {
     );
     expect(detach).toHaveBeenCalledOnce();
   });
+
+  it("媒体布局永久不返回时报告局部超时", async () => {
+    const webContents = {
+      executeJavaScript: vi.fn(() => new Promise(() => undefined)),
+      debugger: {
+        isAttached: vi.fn(() => false)
+      }
+    } as unknown as WebContents;
+
+    await expect(
+      captureDocxMediaWithElectronWebContents(
+        webContents,
+        request,
+        undefined,
+        { renderMs: 10, screenshotMs: 10 }
+      )
+    ).rejects.toThrow("桌面 DOCX 媒体布局超过 10ms");
+  });
+
+  it("单个 PNG 永久不返回时报告媒体编号和类型", async () => {
+    let attached = false;
+    const detach = vi.fn(() => {
+      attached = false;
+    });
+    const webContents = {
+      executeJavaScript: vi.fn(async () => plan),
+      debugger: {
+        isAttached: vi.fn(() => attached),
+        attach: vi.fn(() => {
+          attached = true;
+        }),
+        detach,
+        sendCommand: vi.fn(() => new Promise(() => undefined))
+      }
+    } as unknown as WebContents;
+
+    await expect(
+      captureDocxMediaWithElectronWebContents(
+        webContents,
+        request,
+        undefined,
+        { renderMs: 10, screenshotMs: 10 }
+      )
+    ).rejects.toThrow(
+      "桌面 DOCX 第 1/1 个媒体（image）PNG 捕获超过 10ms"
+    );
+    expect(detach).toHaveBeenCalledOnce();
+  });
 });