refactor: 架构改进 前5个缺陷修复

1. Chat 路由从 app.py 拆到 chat_bp 蓝图（14个路由  0个残留在 app.py）
2. 新增 resolve_tenant_id 装饰器，写操作未指定 tenant_id 时记录警告日志
3. dialogue_manager.process_user_message 补齐 tenant_id 参数，知识库搜索和对话保存都传递 tenant_id
4. service_manager 新增直接 manager 访问器（knowledge_manager、dialogue_manager、conversation_history_manager、alert_system、token_monitor），新代码可绕过 TSPAssistant facade
5. TSPAssistant.get_assistant() 标记为 legacy，引导新代码使用具体 manager

src/web/blueprints/chat.py

@@ -0,0 +1,126 @@
+# -*- coding: utf-8 -*-
+"""
+实时对话蓝图
+处理 WebSocket/HTTP 对话相关的 API 路由
+"""
+import logging
+from flask import Blueprint, request, jsonify, Response
+from src.web.service_manager import service_manager
+
+logger = logging.getLogger(__name__)
+
+chat_bp = Blueprint('chat', __name__, url_prefix='/api/chat')
+
+
+@chat_bp.route('/session', methods=['POST'])
+def create_session():
+    """创建对话会话"""
+    try:
+        data = request.get_json()
+        user_id = data.get('user_id', 'anonymous')
+        work_order_id = data.get('work_order_id')
+        tenant_id = data.get('tenant_id')
+        session_id = service_manager.get_chat_manager().create_session(user_id, work_order_id, tenant_id=tenant_id)
+        return jsonify({"success": True, "session_id": session_id, "message": "会话创建成功"})
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@chat_bp.route('/message', methods=['POST'])
+def send_message():
+    """发送聊天消息"""
+    try:
+        data = request.get_json()
+        session_id = data.get('session_id')
+        message = data.get('message')
+        if not session_id or not message:
+            return jsonify({"error": "缺少必要参数"}), 400
+        result = service_manager.get_chat_manager().process_message(session_id, message)
+        return jsonify(result)
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@chat_bp.route('/message/stream', methods=['POST'])
+def send_message_stream():
+    """流式聊天消息 — SSE 逐 token 推送"""
+    try:
+        data = request.get_json()
+        session_id = data.get('session_id')
+        message = data.get('message')
+        if not session_id or not message:
+            return jsonify({"error": "缺少必要参数"}), 400
+        chat_mgr = service_manager.get_chat_manager()
+
+        def generate():
+            try:
+                for event in chat_mgr.process_message_stream(session_id, message):
+                    yield event
+            except Exception as e:
+                import json
+                yield f"data: {json.dumps({'error': str(e)}, ensure_ascii=False)}\n\n"
+
+        return Response(generate(), mimetype='text/event-stream',
+                        headers={'Cache-Control': 'no-cache', 'X-Accel-Buffering': 'no'})
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@chat_bp.route('/history/<session_id>')
+def get_history(session_id):
+    """获取对话历史"""
+    try:
+        history = service_manager.get_chat_manager().get_session_history(session_id)
+        return jsonify({"success": True, "history": history})
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@chat_bp.route('/work-order', methods=['POST'])
+def create_work_order():
+    """从对话中创建工单"""
+    try:
+        data = request.get_json()
+        session_id = data.get('session_id')
+        title = data.get('title')
+        description = data.get('description')
+        category = data.get('category', '技术问题')
+        priority = data.get('priority', 'medium')
+        if not session_id or not title or not description:
+            return jsonify({"error": "缺少必要参数"}), 400
+        result = service_manager.get_chat_manager().create_work_order(session_id, title, description, category, priority)
+        return jsonify(result)
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@chat_bp.route('/work-order/<int:work_order_id>')
+def get_work_order_status(work_order_id):
+    """获取工单状态"""
+    try:
+        result = service_manager.get_chat_manager().get_work_order_status(work_order_id)
+        return jsonify(result)
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@chat_bp.route('/session/<session_id>', methods=['DELETE'])
+def end_session(session_id):
+    """结束对话会话"""
+    try:
+        success = service_manager.get_chat_manager().end_session(session_id)
+        return jsonify({"success": success, "message": "会话已结束" if success else "结束会话失败"})
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@chat_bp.route('/sessions')
+def get_active_sessions():
+    """获取活跃会话列表"""
+    try:
+        manager = service_manager.get_chat_manager()
+        sessions = manager.get_active_sessions()
+        return jsonify({"success": True, "sessions": sessions})
+    except Exception as e:
+        logger.error(f"获取活跃会话失败: {e}")
+        return jsonify({"error": str(e)}), 500