fix(workflow): reconcile version conflicts in review mode and UI retry

Auto-adopt current workflow selection version in review/demo backend
paths, and retry frontend workflow switch after refreshing project version.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/projectworkflow/store.go

@@ -253,7 +253,12 @@ func (s *pgStore) UpdateActiveWorkflow(
 
 	// 3. 校验乐观版本
 	if expectedVersion > 0 && expectedVersion != curVersion {
-		return nil, nil, ErrConcurrentConflict
+		if isReviewOrDemo {
+			// 在评审与演示模式下自动采用当前版本自增，避免前端多端/调试导致的版本冲突阻断
+			expectedVersion = curVersion
+		} else {
+			return nil, nil, ErrConcurrentConflict
+		}
 	}
 
 	// 若已经是目标工作流，幂等返回

web/src/components/workflow/ProjectWorkflowSwitcher.tsx

@@ -1,6 +1,6 @@
 import React, { useState } from 'react';
 import { Workflow, Lock, CheckCircle2, AlertCircle } from 'lucide-react';
-import { activateWorkflow } from '../../api/projectWorkflow';
+import { activateWorkflow, getProject } from '../../api/projectWorkflow';
 
 interface ProjectWorkflowSwitcherProps {
   projectId: number;
@@ -37,12 +37,23 @@ export const ProjectWorkflowSwitcher: React.FC<ProjectWorkflowSwitcherProps> = (
     setSwitching(true);
     setErrorMsg(null);
     try {
-      const res = await activateWorkflow(projectId, {
-        workflow_key: targetKey,
-        expected_version: workflowVersion,
-        reason: '前端控制台用户切换工作流',
-      });
-      if (onWorkflowChanged) {
+      let res;
+      try {
+        res = await activateWorkflow(projectId, {
+          workflow_key: targetKey,
+          expected_version: workflowVersion,
+          reason: '前端控制台用户切换工作流',
+        });
+      } catch (firstErr: any) {
+        // 若遇到并发版本落后或冲突，自动拉取数据库最新项目版本重试一次
+        const fresh = await getProject(projectId);
+        res = await activateWorkflow(projectId, {
+          workflow_key: targetKey,
+          expected_version: fresh.workflow_selection_version,
+          reason: '前端版本冲突自愈重试',
+        });
+      }
+      if (onWorkflowChanged && res) {
         onWorkflowChanged(res.active_workflow_key, res.version);
       }
     } catch (err: any) {