添加了MCP SEE支持

能不能用我不知道，先加进来。主要我没有服务，无法测试

src/mcp/config.py

@@ -0,0 +1,112 @@
+"""
+MCP SSE 客户端配置类
+"""
+
+from dataclasses import dataclass, field
+from typing import Optional, Dict, Any
+from src.config.config_base import ConfigBase
+
+
+@dataclass
+class MCPSSEConfig(ConfigBase):
+    """MCP Server-Sent Events 客户端配置类"""
+
+    enable: bool = False
+    """是否启用 MCP SSE 客户端"""
+
+    server_url: str = ""
+    """MCP 服务器 SSE 端点 URL，例如: http://localhost:8080/events"""
+
+    auth_key: str = ""
+    """MCP 服务器认证密钥"""
+
+    # 连接配置
+    connection_timeout: int = 30
+    """连接超时时间（秒）"""
+
+    read_timeout: int = 60
+    """读取超时时间（秒）"""
+
+    # 重连配置
+    enable_reconnect: bool = True
+    """是否启用自动重连"""
+
+    max_reconnect_attempts: int = 10
+    """最大重连尝试次数，-1 表示无限重连"""
+
+    initial_reconnect_delay: float = 1.0
+    """初始重连延迟时间（秒）"""
+
+    max_reconnect_delay: float = 60.0
+    """最大重连延迟时间（秒）"""
+
+    reconnect_backoff_factor: float = 2.0
+    """重连延迟指数退避因子"""
+
+    # 事件处理配置
+    event_buffer_size: int = 1000
+    """事件缓冲区大小"""
+
+    enable_event_logging: bool = True
+    """是否启用事件日志记录"""
+
+    # 订阅配置
+    subscribed_events: list[str] = field(default_factory=lambda: [])
+    """订阅的事件类型列表，空列表表示订阅所有事件"""
+
+    # 高级配置
+    custom_headers: Dict[str, str] = field(default_factory=dict)
+    """自定义 HTTP 头部"""
+
+    user_agent: str = "MaiBot-MCP-SSE-Client/1.0"
+    """用户代理字符串"""
+
+    # SSL 配置
+    verify_ssl: bool = True
+    """是否验证 SSL 证书"""
+
+    ssl_cert_path: Optional[str] = None
+    """SSL 客户端证书路径"""
+
+    ssl_key_path: Optional[str] = None
+    """SSL 客户端密钥路径"""
+
+    def __post_init__(self):
+        """配置验证"""
+        if self.enable and not self.server_url:
+            raise ValueError("启用 MCP SSE 客户端时必须提供 server_url")
+        
+        if self.connection_timeout <= 0:
+            raise ValueError("connection_timeout 必须大于 0")
+        
+        if self.read_timeout <= 0:
+            raise ValueError("read_timeout 必须大于 0")
+        
+        if self.max_reconnect_attempts < -1:
+            raise ValueError("max_reconnect_attempts 必须大于等于 -1")
+        
+        if self.initial_reconnect_delay <= 0:
+            raise ValueError("initial_reconnect_delay 必须大于 0")
+        
+        if self.max_reconnect_delay <= 0:
+            raise ValueError("max_reconnect_delay 必须大于 0")
+        
+        if self.reconnect_backoff_factor <= 1.0:
+            raise ValueError("reconnect_backoff_factor 必须大于 1.0")
+        
+        if self.event_buffer_size <= 0:
+            raise ValueError("event_buffer_size 必须大于 0")
+
+    def get_headers(self) -> Dict[str, str]:
+        """获取完整的 HTTP 头部"""
+        headers = {
+            "Accept": "text/event-stream",
+            "Cache-Control": "no-cache",
+            "User-Agent": self.user_agent,
+        }
+        
+        if self.auth_key:
+            headers["Authorization"] = f"Bearer {self.auth_key}"
+        
+        headers.update(self.custom_headers)
+        return headers