feat: 智能体详情新增「最近对话」列表，完善推荐问题与任务深链配置

- 新增 AgentRecentChats 组件，在智能体详情面板底部按 agent_id 展示最近对话
- 调整问答/智能体侧边栏与最近对话列表展示逻辑
- 补充 dashboard-input、task-deeplink 相关配置与线程工具方法
- 后端推荐问题接口标签处理及 position_sync 微调，新增相关测试

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/pages/AgentChatPage.tsx

@@ -469,6 +469,7 @@ export default function AgentChatPage({
           disabled={thread.isLoading || isDemoMode}
           onAskQuestion={(text) => handleSubmit({ text, files: [] })}
           defaultCollapsed={taskCtxOn}
+          showRecentChats={!taskCtxOn}
         />
       </div>
     </ThreadContext.Provider>

frontend-web/src/pages/NewAgentPage.tsx

@@ -7,7 +7,7 @@ import {
   SaveIcon,
   SearchIcon,
 } from "lucide-react";
-import { useRouter } from "next/navigation";
+import { useParams, useRouter } from "next/navigation";
 import { useCallback, useEffect, useMemo, useState } from "react";
 import { toast } from "sonner";
 
@@ -76,7 +76,11 @@ function getCreateAgentErrorMessage(
 export default function NewAgentPage() {
   const { t } = useI18n();
   const router = useRouter();
-  const threadId = useMemo(() => uuid(), []);
+  // 从「常用对话」点击某条智能体创建（bootstrap）会话回到本页时，URL 带 thread_id，
+  // 用它恢复该会话（加载历史消息、继续对话）；正常进入则新开一个会话。
+  const { thread_id: resumeThreadId } = useParams<{ thread_id?: string }>();
+  const generatedThreadId = useMemo(() => uuid(), []);
+  const threadId = resumeThreadId || generatedThreadId;
 
   const [nameInput, setNameInput] = useState("");
   const [descriptionInput, setDescriptionInput] = useState("");
@@ -93,7 +97,8 @@ export default function NewAgentPage() {
   const [isSkillSelectionTouched, setIsSkillSelectionTouched] = useState(false);
   const [detailSkillName, setDetailSkillName] = useState<string | null>(null);
   const [skillSearch, setSkillSearch] = useState("");
-  const [threadPrepared, setThreadPrepared] = useState(false);
+  // 恢复已有 bootstrap 会话时该 thread 已存在，无需再 create（置为 true，跳过创建）。
+  const [threadPrepared, setThreadPrepared] = useState(!!resumeThreadId);
   const { skills, isLoading: isSkillsLoading } = useSkills();
   const { models, isLoading: isModelsLoading } = useModels();
 

frontend-web/src/pages/WorkspaceRoutes.tsx

@@ -57,6 +57,12 @@ function NotebookDetailPageWithKey() {
   return <StudioNotebookDetailPage key={notebookId} />;
 }
 
+// 恢复某条 bootstrap 会话时按 thread_id 重挂，切换会话不串台。
+function NewAgentPageWithKey() {
+  const { thread_id } = useParams<{ thread_id: string }>();
+  return <NewAgentPage key={thread_id} />;
+}
+
 function isInIframe(): boolean {
   try {
     return window.self !== window.top;
@@ -279,6 +285,16 @@ export default function WorkspaceRoutes({
             </WorkspaceLayout>
           }
         />
+        {/* 从「常用对话」点击智能体创建（bootstrap）会话回到创建页并恢复该会话。
+            key 绑定 thread_id —— 切换不同 bootstrap 会话时重挂一个干净的页面。 */}
+        <Route
+          path="agents/new/:thread_id"
+          element={
+            <WorkspaceLayout {...layoutProps}>
+              <NewAgentPageWithKey />
+            </WorkspaceLayout>
+          }
+        />
         <Route
           path="agents/:agent_id/chats"
           element={<Navigate to="/page/workspace/agents" replace />}