fix(agent-browser): restore bounded presentation lifecycle

tests/e2e/pi-coding-first-chat.spec.ts

@@ -426,6 +426,21 @@ async function installCodingFirstChatHost(
       ok: true,
       data: { status, ok: status >= 200 && status < 300, json },
     });
+    const browserSnapshot = (overrides: Record<string, unknown> = {}) => ({
+      browserId: null,
+      projectId: project.id,
+      projectPath: null,
+      state: 'closed',
+      generation: 0,
+      url: '',
+      title: '',
+      visible: false,
+      bounds: null,
+      canGoBack: false,
+      canGoForward: false,
+      eventCursor: 0,
+      ...overrides,
+    });
 
     ipcMain.removeHandler('hostapi:fetch');
     ipcMain.handle('hostapi:fetch', async (
@@ -528,6 +543,47 @@ async function installCodingFirstChatHost(
               : [],
         });
       }
+      if (path.startsWith('/api/agent-browser/state?')) {
+        return respond({ success: true, browser: browserSnapshot() });
+      }
+      if (path === '/api/agent-browser/open' && method === 'POST') {
+        return respond({
+          success: true,
+          browser: browserSnapshot({
+            browserId: 'browser-e2e',
+            state: 'attached',
+            generation: 1,
+            url: body?.url,
+            visible: true,
+            bounds: body?.bounds,
+          }),
+        });
+      }
+      if (path === '/api/agent-browser/present' && method === 'POST') {
+        return respond({
+          success: true,
+          browser: browserSnapshot({
+            browserId: 'browser-e2e',
+            state: 'attached',
+            generation: 1,
+            url: 'http://127.0.0.1:4173/',
+            visible: body?.visible === true,
+            bounds: body?.bounds ?? null,
+          }),
+        });
+      }
+      if (path === '/api/agent-browser/diagnostics' && method === 'POST') {
+        return respond({ success: true, browser: browserSnapshot() });
+      }
+      if (path === '/api/agent-browser/cdp/events' && method === 'POST') {
+        return respond({
+          success: true,
+          page: { events: [], nextCursor: 0, hasMore: false },
+        });
+      }
+      if (path === '/api/agent-browser/close' && method === 'POST') {
+        return respond({ success: true, browser: browserSnapshot() });
+      }
       if (path === '/api/coding/projects/conversations' && method === 'POST') {
         state.conversationCreated = true;
         return respond({ conversation }, 201);
@@ -1039,6 +1095,20 @@ test('PI feature UI isolates Conversations and exposes queue, interaction, model
     await expect(conversationHeader.getByRole('button', { name: '归档' })).toHaveCount(0);
     await expect(conversationHeader.getByRole('button', { name: '智能体设置' })).toHaveCount(0);
     await expect(conversationHeader.getByRole('button', { name: '打开编程工具' })).toHaveCount(0);
+    const browserToggle = conversationHeader.getByRole('button', { name: '打开开发浏览器' });
+    await expect(browserToggle).toBeVisible();
+    await browserToggle.click();
+    await expect(page.getByTestId('agent-browser-panel')).toBeVisible();
+    await expect(page.getByTestId('agent-browser-diagnostics')).toHaveAttribute('data-state', 'closed');
+    await expect.poll(async () => {
+      const state = await readState(electronApp);
+      return state.captured.some((request) => request.path.startsWith('/api/agent-browser/state?'));
+    }).toBe(true);
+    expect((await readState(electronApp)).captured.some(
+      (request) => request.path === '/api/agent-browser/diagnostics',
+    )).toBe(false);
+    await page.getByRole('button', { name: '关闭开发浏览器' }).last().click();
+    await expect(page.getByTestId('agent-browser-panel')).toHaveCount(0);
     await expect(page.getByRole('button', { name: '项目设置' })).toHaveCount(1);
     await expect(page.getByTestId('coding-conversation-sidebar')).toBeVisible();
     const activeProcess = page.getByTestId('coding-process-group');