feat: 微信公众号技能包重命名(weixin_public_account)并增强功能

- 将 wechat_official_account 重命名为 weixin_public_account，符合中文命名规范
- 新增 DOCX 文档生成技能、聊天历史、请求 ID 中间件
- 增强工作流、热点服务、文章服务等模块功能
- 前端同步重命名组件和 API
- 新增架构文档 AR13/AR14、专员文档更新
- 补充测试用例(seed_specialists_test, db_migration_test)

Co-Authored-AI: yes

eai_agentplatform/frontend/src/api/ai.js

@@ -1,5 +1,15 @@
 import http from './http'
 
+// 会话持久化：列出当前用户的 AI 对话会话
+export function listChatConversations() {
+  return http.get('/ai-chat/conversations')
+}
+
+// 会话持久化：获取某个会话的历史消息
+export function getChatConversationMessages(conversationId) {
+  return http.get(`/ai-chat/conversations/${conversationId}/messages`)
+}
+
 export function quickActions() {
   return http.get('/ai-chat/quick-actions')
 }
@@ -32,20 +42,36 @@ export function getSecretsStatus() {
   return http.get('/ai/secrets-status')
 }
 
+// 管理员：AI 通路测试 —— 获取某路由的候选模型清单（配置 model ∪ 自动发现）
+export function getRouteTestModels(routeId) {
+  return http.post('/ai/route-test/models', { route_id: routeId })
+}
+
+// 管理员：AI 通路测试 —— 对单个模型或候选模型逐个发起真实测试
+// models 为空 → 只测配置 model；填多个 → 逐个试跑
+export function runRouteTest(params) {
+  return http.post('/ai/route-test/run', params || {})
+}
+
 // SSE 流式对话：后端 text/event-stream，每行 "data: {json}\n\n"
-export async function streamChat(message, context, history, handlers) {
+// conversationId 可选：传入后请求体会携带 conversation_id，用于会话持久化
+export async function streamChat(message, context, history, handlers, conversationId = '') {
   const token = localStorage.getItem('token')
   const onChunk = typeof handlers === 'function' ? handlers : handlers?.onChunk
   const onMeta = typeof handlers === 'function' ? null : handlers?.onMeta
   const onDone = typeof handlers === 'function' ? null : handlers?.onDone
   const aiRouteId = typeof handlers === 'function' ? '' : (handlers?.aiRouteId || '')
+  const payload = { message, context, history, ai_route_id: aiRouteId }
+  if (conversationId) {
+    payload.conversation_id = conversationId
+  }
   const resp = await fetch('/api/ai-chat/message', {
     method: 'POST',
     headers: {
       'Content-Type': 'application/json',
       Authorization: `Bearer ${token}`,
     },
-    body: JSON.stringify({ message, context, history, ai_route_id: aiRouteId }),
+    body: JSON.stringify(payload),
   })
 
   if (!resp.ok) {