feat: 重构 MCP 配置管理，移除旧配置文件，更新为使用全局配置

src/maisaka/chat_loop_service.py

@@ -5,7 +5,7 @@ from dataclasses import dataclass
 from datetime import datetime
 from io import BytesIO
 from time import perf_counter
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict, List, Optional, Sequence
 
 import asyncio
 import random
@@ -133,14 +133,14 @@ class MaisakaChatLoopService:
 
             self._prompts_loaded = True
 
-    def set_extra_tools(self, tools: List[ToolDefinitionInput]) -> None:
+    def set_extra_tools(self, tools: Sequence[ToolDefinitionInput]) -> None:
         """设置额外工具定义。
 
         Args:
             tools: 兼容旧接口的额外工具定义列表。
         """
 
-        self._extra_tools = normalize_tool_options(tools) or []
+        self._extra_tools = normalize_tool_options(list(tools)) or []
 
     def set_tool_registry(self, tool_registry: ToolRegistry | None) -> None:
         """设置统一工具注册表。

src/maisaka/runtime.py

@@ -1,6 +1,5 @@
 """Maisaka 非 CLI 运行时。"""
 
-from pathlib import Path
 from typing import Literal, Optional
 
 import asyncio
@@ -91,7 +90,7 @@ class MaisakaHeartFlowChatting:
             self._ensure_background_tasks_running()
             return
 
-        if global_config.maisaka.enable_mcp:
+        if global_config.mcp.enable:
             await self._init_mcp()
 
         self._running = True
@@ -386,8 +385,7 @@ class MaisakaHeartFlowChatting:
 
     async def _init_mcp(self) -> None:
         """初始化 MCP 工具并注册到统一工具层。"""
-        config_path = Path(__file__).resolve().parents[2] / "config" / "mcp_config.json"
-        self._mcp_manager = await MCPManager.from_config(str(config_path))
+        self._mcp_manager = await MCPManager.from_app_config(global_config.mcp)
         if self._mcp_manager is None:
             logger.info(f"{self.log_prefix} MCP 管理器不可用")
             return