fix(agent-browser): bound crashed preview cleanup

tests/unit/agent-browser-core.test.ts

@@ -924,6 +924,54 @@ describe('AgentBrowserModule', () => {
     expect(adapter.views).toHaveLength(2);
   });
 
+  it('bounds crashed preview cleanup so a subsequent data-enabled open completes', async () => {
+    vi.useFakeTimers();
+    try {
+      const adapter = new FakeAdapter();
+      const preview = new FakePreviewDataSession();
+      adapter.onCreate = (view) => {
+        view.webContents.debugger.responders.set('Page.addScriptToEvaluateOnNewDocument', async () => ({
+          identifier: 'script-root',
+        }));
+      };
+      const module = new AgentBrowserModule(adapter, { previewDataSession: preview });
+
+      await module.open({
+        projectId: 'clock',
+        projectPath,
+        url: 'http://127.0.0.1:4173/',
+        injectProjectData: true,
+      });
+      const crashedView = adapter.views[0];
+      crashedView.webContents.debugger.responders.set(
+        'Page.removeScriptToEvaluateOnNewDocument',
+        async () => await new Promise<unknown>(() => undefined),
+      );
+
+      crashedView.webContents.emit('render-process-gone', {}, { reason: 'crashed' });
+      expect(preview.invalidations).toContain('browser_crashed');
+      expect(preview.getInjectionValue()).toBeNull();
+
+      const reopening = module.open({
+        projectId: 'clock',
+        projectPath,
+        url: 'http://127.0.0.1:4173/',
+        injectProjectData: true,
+      });
+      await vi.advanceTimersByTimeAsync(1_000);
+
+      await expect(reopening).resolves.toMatchObject({
+        state: 'attached',
+        generation: 2,
+      });
+      expect(preview.invalidations).toContain('browser_crashed');
+      expect(preview.opens).toHaveLength(2);
+      expect(adapter.views).toHaveLength(2);
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
   it('replaces a data-enabled browser when a later ordinary open omits the opt-in', async () => {
     const adapter = new FakeAdapter();
     const preview = new FakePreviewDataSession();