Merge branch 'ji' into master

合并 ji 的功能：开放问答接口（/api/open/chat[/stream] 回传生成文件 + 临时不留存）、
技能地址管理、智能体详情「最近对话」等。
冲突 frontend StrategyRoutes.tsx 已解决：同时保留 admin/roundtable-diagnostics(master)
与 admin/skill-addresses(ji) 两个管理员路由。

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

offline-backend-20260512/backend/app/gateway/app.py

@@ -50,6 +50,7 @@ from app.gateway.routers import (
     models,
     multi_agent,
     notifications,
+    open_chat,
     parallel_agent_tasks,
     parallel_agents,
     positions,
@@ -69,6 +70,7 @@ from app.gateway.routers import (
     runs,
     scheduled_tasks,
     sensitive_words,
+    skill_addresses,
     skills,
     suggestions,
     system_settings,
@@ -1359,6 +1361,9 @@ This gateway provides custom endpoints for models, MCP configuration, skills, an
     # Sensitive-word map (敏感词管理 / 脱敏词) at /api/sensitive-words
     app.include_router(sensitive_words.router)
 
+    # Skill URL/IP batch replace (技能地址管理) at /api/skill-addresses
+    app.include_router(skill_addresses.router)
+
     # 大屏绘制智能体独立页面会话（按 taskId 存取，不分权）at /api/dashboard-sessions
     app.include_router(dashboard_sessions.router)
 
@@ -1456,6 +1461,9 @@ This gateway provides custom endpoints for models, MCP configuration, skills, an
     # Stateless Runs API (stream/wait without a pre-existing thread)
     app.include_router(runs.router)
 
+    # 开放问答接口 /api/open/chat —— 无需登录,指定模型 + 智能体做问答,可关闭思考模式
+    app.include_router(open_chat.router)
+
     # --- ?????????? /page/workspace/roundtable/planning?---
     # ??? app/gateway/routers/{multi_agent,intent,recommend}.py?
     # ??? frontend-web/docs/multi-agent-backend-dev.md