fix(backend): Resolve PgBoss infinite loop issue and cleanup unused files

Backend fixes:
- Fix PgBoss task infinite loop on SAE (root cause: missing queue table constraints)
- Add singletonKey to prevent duplicate job enqueueing
- Add idempotency check in reviewWorker (skip completed tasks)
- Add optimistic locking in reviewService (atomic status update)

Frontend fixes:
- Add isSubmitting state to prevent duplicate submissions in RVW Dashboard
- Fix API baseURL in knowledgeBaseApi (relative path)

Cleanup (removed):
- Old frontend/ directory (migrated to frontend-v2)
- python-microservice/ (unused, replaced by extraction_service)
- Root package.json and node_modules (accidentally created)
- redcap-docker-dev/ (external dependency)
- Various temporary files and outdated docs in root

New documentation:
- docs/07-运维文档/01-PgBoss队列监控与维护.md
- docs/07-运维文档/02-故障预防检查清单.md
- docs/07-运维文档/03-数据库迁移注意事项.md

Database fix applied to RDS:
- Added PRIMARY KEY to platform_schema.queue
- Added 3 missing foreign key constraints

Tested: Local build passed, RDS constraints verified

frontend-v2/src/modules/pkb/api/knowledgeBaseApi.ts

@@ -1,15 +1,20 @@
 /**
  * PKB个人知识库 API
  * API路径: /api/v1/pkb/knowledge
+ * 
+ * 修复说明（2026-01-27）：
+ * - 移除硬编码的 localhost:3000，改用相对路径
+ * - 使用相对路径后，Nginx 会自动代理到后端服务
  */
 
 import axios from 'axios';
 import { getAccessToken } from '../../../framework/auth/api';
 
-const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || 'http://localhost:3000';
+// 使用相对路径，生产环境由 Nginx 代理到后端
+const API_BASE_URL = '/api/v1/pkb/knowledge';
 
 const api = axios.create({
-  baseURL: `${API_BASE_URL}/api/v1/pkb/knowledge`,
+  baseURL: API_BASE_URL,
   timeout: 30000,
   headers: {
     'Content-Type': 'application/json',

frontend-v2/src/modules/rvw/components/AgentModal.tsx

@@ -10,9 +10,10 @@ interface AgentModalProps {
   taskCount: number;
   onClose: () => void;
   onConfirm: (agents: AgentType[]) => void;
+  isSubmitting?: boolean; // 🔒 防止重复提交
 }
 
-export default function AgentModal({ visible, taskCount, onClose, onConfirm }: AgentModalProps) {
+export default function AgentModal({ visible, taskCount, onClose, onConfirm, isSubmitting = false }: AgentModalProps) {
   const [selectedAgents, setSelectedAgents] = useState<AgentType[]>(['editorial']);
 
   const toggleAgent = (agent: AgentType) => {
@@ -110,10 +111,10 @@ export default function AgentModal({ visible, taskCount, onClose, onConfirm }: A
           </button>
           <button 
             onClick={handleConfirm}
-            disabled={selectedAgents.length === 0}
+            disabled={selectedAgents.length === 0 || isSubmitting}
             className="px-4 py-2 bg-indigo-600 hover:bg-indigo-700 text-white text-sm font-bold rounded-lg shadow-sm transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
           >
-            立即运行
+            {isSubmitting ? '提交中...' : '立即运行'}
           </button>
         </div>
       </div>
@@ -140,6 +141,9 @@ export default function AgentModal({ visible, taskCount, onClose, onConfirm }: A
 
 
 
+
+
+
 
 
 

frontend-v2/src/modules/rvw/pages/Dashboard.tsx

@@ -26,6 +26,7 @@ export default function Dashboard() {
   const [filters, setFilters] = useState<TaskFilters>({ status: 'all', timeRange: 'all' });
   const [agentModalVisible, setAgentModalVisible] = useState(false);
   const [pendingTaskForRun, setPendingTaskForRun] = useState<ReviewTask | null>(null);
+  const [isSubmitting, setIsSubmitting] = useState(false); // 🔒 防止重复提交
   
   // 报告详情
   const [reportDetail, setReportDetail] = useState<ReviewReport | null>(null);
@@ -119,12 +120,19 @@ export default function Dashboard() {
   };
 
   const handleConfirmRun = async (agents: AgentType[]) => {
+    // 🔒 防止重复提交
+    if (isSubmitting) {
+      console.warn('[Dashboard] 已在提交中，忽略重复请求');
+      return;
+    }
+    
     // 🔥 保存到局部变量，避免onClose后丢失
     const taskToRun = pendingTaskForRun;
     
-    // 立即关闭弹窗
+    // 立即关闭弹窗并设置提交状态
     setAgentModalVisible(false);
     setPendingTaskForRun(null);
+    setIsSubmitting(true); // 🔒 锁定
     
     try {
       if (taskToRun) {
@@ -159,6 +167,8 @@ export default function Dashboard() {
       loadTasks();
     } catch (error: any) {
       message.error({ content: error.message || '启动失败', key: 'run', duration: 3 });
+    } finally {
+      setIsSubmitting(false); // 🔓 解锁
     }
   };
 
@@ -277,6 +287,7 @@ export default function Dashboard() {
           setPendingTaskForRun(null);
         }}
         onConfirm={handleConfirmRun}
+        isSubmitting={isSubmitting}
       />
     </div>
   );
@@ -301,6 +312,9 @@ export default function Dashboard() {
 
 
 
+
+
+