feat: add project-aware agent workspace

tests/browser/investigation-main-chat.e2e.ts

@@ -79,22 +79,26 @@ test("证据提问在预览、展开及更多依据中使用统一实体按钮",
   }
 });
 
-async function expectCenteredReference(panel: Locator) {
+async function expectTaskReferenceLayout(panel: Locator) {
   await expect(panel).toHaveAttribute("data-agent-starting", "true");
   await expect(panel.getByRole("group", { name: "对话引用" })).toBeVisible();
   await expect(panel.getByRole("group", { name: "推荐问题" })).toHaveCount(0);
   await expect(panel.locator("form")).toHaveCount(1);
+  // Existing task state keeps the normal reading area, as required by agent-chat-ui-design.md.
+  const status = panel.getByRole("region", { name: "任务协作状态" });
+  await expect(status).toBeVisible();
   await expect.poll(async () => {
     const panelBox = (await panel.boundingBox())!;
-    const header = (await panel.locator("header").boundingBox())!;
     const composer = (await panel.locator("form").boundingBox())!;
-    // The mobile header extends above the panel to cover the drawer handle.
-    const center = (header.y + header.height + panelBox.y + panelBox.height) / 2;
-    return Math.abs(composer.y + composer.height / 2 - center);
-  }).toBeLessThan(2);
+    return panelBox.y + panelBox.height - composer.y - composer.height;
+  }).toBeLessThan(32);
+  const statusBox = (await status.boundingBox())!;
+  const composerBox = (await panel.locator("form").boundingBox())!;
+  expect(composerBox.y).toBeGreaterThanOrEqual(statusBox.y + statusBox.height);
 }
 
 test("单一协作入口展示任务引用，保留草稿且仅手动发送，并适配窄屏", async ({ page }, testInfo) => {
+  test.setTimeout(60_000);
   await page.emulateMedia({ reducedMotion: "reduce" });
   await mockWorkbenchContext(page);
   await mockAgentApi(page, { sessions: [{ session_id: "ordinary-main", title: "供水核查主聊天", purpose: "ordinary_chat", created_at: now, updated_at: now }] });
@@ -124,13 +128,13 @@ test("单一协作入口展示任务引用，保留草稿且仅手动发送，
   const agent = page.getByRole("complementary", { name: "Agent 命令面板" });
   await expect(agent.getByRole("heading", { name: "我已就绪，请描述任务" })).toHaveCount(0);
   await agent.getByRole("button", { name: "打开 Agent 历史记录" }).click();
-  await agent.getByRole("button", { name: /供水核查主聊天/ }).click();
+  await page.getByRole("dialog", { name: "历史对话" }).getByRole("button", { name: /^供水核查主聊天/ }).click();
   const prompt = agent.locator("textarea");
   await prompt.fill("保留的现场补充草稿");
   await page.getByRole("button", { name: "工况任务", exact: true }).click();
   const feed = page.getByRole("region", { name: "工况任务", exact: true });
-  const expand = feed.getByRole("button", { name: "展开工况任务" });
-  if (await expand.isVisible()) await expand.click();
+  await expect(feed).toBeVisible();
+  await feed.getByRole("button", { name: "展开工况任务" }).click();
   await feed.getByRole("button", { name: /调查任务/ }).click();
   await feed.getByText("居民异味投诉调查", { exact: true }).first().click();
   await expect(feed.getByText("16:00", { exact: true })).toBeVisible();
@@ -158,7 +162,7 @@ test("单一协作入口展示任务引用，保留草稿且仅手动发送，
   await expect(prompt).toHaveValue("保留的现场补充草稿\n\n请解释“上游监测数据质量已核对”这条证据的范围、来源和判断影响。");
   await expect(prompt).toBeFocused();
   await expect(reference).toContainText("已引用证据");
-  await expectCenteredReference(agent);
+  await expectTaskReferenceLayout(agent);
   expect(submitted).toBe(0);
   await agent.screenshot({ path: testInfo.outputPath("investigation-reference-desktop.png") });
   await feed.getByRole("button", { name: /定时任务/ }).click();
@@ -167,10 +171,10 @@ test("单一协作入口展示任务引用，保留草稿且仅手动发送，
   const mobileAgent = page.getByRole("complementary", { name: "Agent 命令面板" });
   await expect(mobileAgent.getByRole("heading", { name: "我已就绪，请描述任务" })).toHaveCount(0);
   await expect(mobileAgent.getByRole("group", { name: "对话引用" })).toContainText("居民异味投诉调查");
-  await expectCenteredReference(mobileAgent);
+  await expectTaskReferenceLayout(mobileAgent);
   await mobileAgent.screenshot({ path: testInfo.outputPath("investigation-reference-narrow.png") });
   await page.setViewportSize({ width: 320, height: 900 });
-  await expectCenteredReference(mobileAgent);
+  await expectTaskReferenceLayout(mobileAgent);
   await mobileAgent.screenshot({ path: testInfo.outputPath("investigation-reference-320.png") });
   expect(await mobileAgent.evaluate((element) => element.scrollWidth <= element.clientWidth + 1)).toBe(true);
   await page.setViewportSize({ width: 375, height: 900 });
@@ -194,10 +198,10 @@ test("单一协作入口展示任务引用，保留草稿且仅手动发送，
     return panelBox.y + panelBox.height - composer.y - composer.height;
   }).toBeLessThan(32);
   await expect(mobileAgent.getByRole("button", { name: "停止 Agent 分析" })).toHaveCount(0);
-  await mobileAgent.getByRole("button", { name: "打开 Agent 历史记录" }).click();
-  await mobileAgent.getByRole("button", { name: /供水核查主聊天/ }).click();
-  await expect(mobileAgent.getByRole("group", { name: "对话引用" })).toHaveCount(0);
   incoming = true;
+  await mobileAgent.getByRole("button", { name: "打开 Agent 历史记录" }).click();
+  await page.getByRole("dialog", { name: "历史对话" }).getByRole("button", { name: /^供水核查主聊天/ }).click();
+  await expect(mobileAgent.getByRole("group", { name: "对话引用" })).toHaveCount(0);
   await expect(mobileAgent.getByText("已核对上游监测，请补充现场采样记录。")).toBeVisible();
   await expect(mobileAgent.getByText("待接收", { exact: true })).toBeVisible();
   await expect(mobileAgent.getByRole("button", { name: "停止 Agent 分析" })).toHaveCount(0);