feat: AI 助手模型管理（CRUD、会话绑定、自动化验收）

- Flyway V6：模型表、默认种子、ai_chat_session.model_id 回填
- 管理端 /api/admin/ai/models；用户端选模与新会话绑定
- 禁用模型后会话只读（5009）；chat 按会话 modelCode 调 DashScope
- 前端 AiModels 页、助手模型选择器与 localStorage
- 单测、AiModelManagementApiIT、Playwright E2E；e2e Profile 关闭注解限流
- 技术实施文档与验收报告；移除过期冲突分析文档

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

jog-frontend/src/api/aiChat.js

@@ -1,7 +1,7 @@
 import request from '@/utils/request'
 
-export function createAiChatSession() {
-  return request.post('/api/app/ai/sessions')
+export function createAiChatSession(data) {
+  return request.post('/api/app/ai/sessions', data ?? {})
 }
 
 export function listAiChatSessions(params) {

jog-frontend/src/api/aiModel.js

@@ -0,0 +1,25 @@
+import request from '@/utils/request'
+
+export function listAdminAiModels() {
+  return request.get('/api/admin/ai/models')
+}
+
+export function getAdminAiModel(id) {
+  return request.get(`/api/admin/ai/models/${id}`)
+}
+
+export function createAdminAiModel(data) {
+  return request.post('/api/admin/ai/models', data)
+}
+
+export function updateAdminAiModel(id, data) {
+  return request.put(`/api/admin/ai/models/${id}`, data)
+}
+
+export function deleteAdminAiModel(id) {
+  return request.delete(`/api/admin/ai/models/${id}`)
+}
+
+export function listAppAiModels() {
+  return request.get('/api/app/ai/models')
+}