update:1.更新mcp插件功能，目前只支持remote调用

backend/app/models/mcp_plugin.py

@@ -0,0 +1,52 @@
+"""MCP插件配置数据模型"""
+from sqlalchemy import Column, String, Text, Boolean, Integer, DateTime, Index, JSON
+from sqlalchemy.sql import func
+from app.database import Base
+import uuid
+
+
+class MCPPlugin(Base):
+    """MCP插件配置表"""
+    __tablename__ = "mcp_plugins"
+    
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    user_id = Column(String(50), nullable=False, index=True, comment="用户ID")
+    
+    # 插件基本信息
+    plugin_name = Column(String(100), nullable=False, comment="插件名称（唯一标识）")
+    display_name = Column(String(200), nullable=False, comment="显示名称")
+    description = Column(Text, comment="插件描述")
+    plugin_type = Column(String(50), default="http", comment="插件类型：http/stdio")
+    
+    # 连接配置
+    server_url = Column(String(500), comment="服务器URL（HTTP类型）")
+    command = Column(String(500), comment="启动命令（stdio类型）")
+    args = Column(JSON, comment="命令参数（stdio类型）")
+    env = Column(JSON, comment="环境变量")
+    headers = Column(JSON, comment="HTTP请求头")
+    
+    # 插件配置
+    config = Column(JSON, comment="插件特定配置（JSON）")
+    tools = Column(JSON, comment="提供的工具列表")
+    
+    # 状态管理
+    enabled = Column(Boolean, default=True, comment="是否启用")
+    status = Column(String(50), default="inactive", comment="状态：active/inactive/error")
+    last_error = Column(Text, comment="最后错误信息")
+    last_test_at = Column(DateTime, comment="最后测试时间")
+    
+    # 排序和分组
+    category = Column(String(100), default="general", comment="分类")
+    sort_order = Column(Integer, default=0, comment="排序顺序")
+    
+    # 时间戳
+    created_at = Column(DateTime, server_default=func.now(), comment="创建时间")
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now(), comment="更新时间")
+    
+    __table_args__ = (
+        Index('idx_user_plugin', 'user_id', 'plugin_name', unique=True),
+        Index('idx_user_enabled', 'user_id', 'enabled'),
+    )
+    
+    def __repr__(self):
+        return f"<MCPPlugin(id={self.id}, name={self.plugin_name}, enabled={self.enabled})>"