feat: 添加MCP调试插件并优化流式超时处理

refactor(relay): 将Provider Key管理路由移至model_config模块
fix(saas): 修复demo_keys与provider_keys的匹配逻辑
perf(runtime): 将流式响应超时从60秒延长至180秒以适配思考型模型
docs: 新增模块化审计和上线前功能测试方案文档
chore: 添加tauri-plugin-mcp依赖及相关配置

.mcp.json

@@ -0,0 +1,15 @@
+{
+  "mcpServers": {
+    "tauri-mcp": {
+      "command": "node",
+      "args": [
+        "C:/Users/szend/AppData/Roaming/npm/node_modules/tauri-plugin-mcp-server/build/index.js"
+      ],
+      "env": {
+        "TAURI_MCP_CONNECTION_TYPE": "tcp",
+        "TAURI_MCP_TCP_HOST": "127.0.0.1",
+        "TAURI_MCP_TCP_PORT": "4000"
+      }
+    }
+  }
+}