fix: close and recreate macOS windows safely

tests/unit/agent-browser-electron-adapter.test.ts

@@ -106,7 +106,7 @@ describe('ElectronAgentBrowserAdapter', () => {
   });
 
   it.each([false, true])('captures a page without presenting a hidden native view (visible=%s)', async (visible) => {
-    const adapter = new ElectronAgentBrowserAdapter({} as never);
+    const adapter = new ElectronAgentBrowserAdapter(() => null);
     const view = adapter.createView('browser-screenshot');
     const native = electronMocks.nativeViews[0];
     native.getVisible.mockReturnValue(visible);
@@ -184,6 +184,46 @@ describe('ElectronAgentBrowserAdapter', () => {
     ).toHaveBeenCalledOnce();
   });
 
+  it('binds new views to the reopened window and never detaches them from an old owner', () => {
+    const makeWindow = () => ({
+      isDestroyed: vi.fn().mockReturnValue(false),
+      contentView: { addChildView: vi.fn(), removeChildView: vi.fn() },
+      webContents: { getZoomFactor: vi.fn().mockReturnValue(1) },
+      getContentBounds: vi.fn().mockReturnValue({ width: 900, height: 650 }),
+    });
+    const first = makeWindow();
+    const second = makeWindow();
+    let current: ReturnType<typeof makeWindow> | null = first;
+    const adapter = new ElectronAgentBrowserAdapter(() => current as never);
+    const oldView = adapter.createView('first');
+    adapter.mount(oldView);
+    first.isDestroyed.mockReturnValue(true);
+    current = null;
+    adapter.unmount(oldView);
+    adapter.destroy(oldView);
+    current = second;
+    const newView = adapter.createView('second');
+    adapter.mount(newView);
+    newView.setBounds({ x: 10, y: 10, width: 800, height: 600 });
+    // A late old-view cleanup cannot remove a view from the replacement window.
+    adapter.unmount(oldView);
+    expect(second.contentView.addChildView).toHaveBeenCalledWith(electronMocks.nativeViews[1]);
+    expect(second.contentView.removeChildView).not.toHaveBeenCalled();
+    expect(first.contentView.addChildView).toHaveBeenCalledTimes(1);
+    expect(electronMocks.nativeViews[1].setBounds).toHaveBeenCalledWith({ x: 10, y: 10, width: 800, height: 600 });
+  });
+
+  it('allows detached preflight views but refuses visible mounting without a window', () => {
+    const adapter = new ElectronAgentBrowserAdapter(() => null);
+    const view = adapter.createView('detached');
+    view.setBounds({ x: 0, y: 0, width: 390, height: 844 });
+    expect(electronMocks.nativeViews[0].setBounds).toHaveBeenCalledWith({ x: 0, y: 0, width: 390, height: 844 });
+    expect(() => adapter.mount(view)).toThrow('请先打开麦洛窗口');
+    expect(() => adapter.unmount(view)).not.toThrow();
+    adapter.destroy(view);
+    expect((electronMocks.nativeViews[0].webContents as { close: unknown }).close).toHaveBeenCalledOnce();
+  });
+
   it('denies downloads and clears only the requested project partition', async () => {
     const adapter = new ElectronAgentBrowserAdapter({
       isDestroyed: vi.fn().mockReturnValue(false),