fix: LLM 配置变更后立即生效 — 热重载 Provider Adapter

- AgentLoopEngine 新增 setAdapter() 热切换方法
- main.ts 提取 createAdapter 工厂函数
- IPC config:set 监听 LLM 相关 key 变更，触发热重载
- 覆盖 provider/model/apiKey/baseURL/numCtx 五个关键配置

electron/harness/agent-loop/engine.ts

@@ -94,6 +94,13 @@ export class AgentLoopEngine extends EventEmitter {
     return [...this.tools];
   }
 
+  /**
+   * 热切换 Provider Adapter（设置变更时调用）
+   */
+  setAdapter(adapter: IMetonaProviderAdapter): void {
+    this.adapter = adapter;
+  }
+
   /**
    * 执行完整的 ReAct 循环（流式模式）
    *

electron/ipc/handlers.ts

@@ -40,6 +40,7 @@ export function registerAllIPCHandlers(
   sessionRecorder: SessionRecorder,
   memoryManager: MemoryManager,
   mcpManager: MCPManager,
+  reloadAdapter: () => void,
 ): void {
 
   // ===== Agent 交互 =====
@@ -322,6 +323,12 @@ export function registerAllIPCHandlers(
       outcome: 'success',
     });
 
+    // LLM 相关配置变更时热重载 Adapter
+    if (['llm.provider', 'llm.model', 'llm.apiKey', 'llm.baseURL', 'ollama.numCtx'].includes(key)) {
+      reloadAdapter();
+      log.info(`[CONFIG] LLM config changed (${key}), adapter reloaded`);
+    }
+
     return { success: true };
   });
 

electron/main.ts

@@ -87,23 +87,26 @@ async function initialize(): Promise<void> {
   const memoryManager = new MemoryManager(() => db);
   memoryManager.initialize();
 
-  // ===== 步骤 4: Provider Adapter =====
-  const provider = configService.get<string>('llm.provider') ?? '';
-  const model = configService.get<string>('llm.model') ?? '';
-  const apiKey = configService.get<string>('llm.apiKey') ?? '';
-  const baseURL = configService.get<string>('llm.baseURL') ?? '';
+  // ===== 步骤 4: Provider Adapter 工厂 =====
+  const createAdapter = () => {
+    const provider = configService.get<string>('llm.provider') ?? '';
+    const model = configService.get<string>('llm.model') ?? '';
+    const apiKey = configService.get<string>('llm.apiKey') ?? '';
+    const baseURL = configService.get<string>('llm.baseURL') ?? '';
 
-  if (!provider || !baseURL || !model) {
-    log.warn('LLM not configured. Please set provider, baseURL, and model in Settings.');
-  }
+    if (!provider || !baseURL || !model) {
+      log.warn('LLM not configured. Please set provider, baseURL, and model in Settings.');
+    }
 
-  const adapterConfig = { provider, baseURL, apiKey, defaultModel: model };
-  let adapter;
-  switch (provider) {
-    case 'agnes': adapter = new AgnesAdapter(adapterConfig); break;
-    case 'ollama': adapter = new OllamaAdapter(adapterConfig); break;
-    default: adapter = new DeepSeekAdapter(adapterConfig); break;
-  }
+    const adapterConfig = { provider, baseURL, apiKey, defaultModel: model };
+    switch (provider) {
+      case 'agnes': return new AgnesAdapter(adapterConfig);
+      case 'ollama': return new OllamaAdapter(adapterConfig);
+      default: return new DeepSeekAdapter(adapterConfig);
+    }
+  };
+
+  const adapter = createAdapter();
 
   // ===== 步骤 5: 工作空间文件 + System Prompt =====
   const contextBuilder = new ContextBuilder();
@@ -161,6 +164,12 @@ async function initialize(): Promise<void> {
   agentLoop.setTools(toolRegistry.listTools());
   agentLoop.setWorkspacePath(workspaceInfo.path);
 
+  // ===== 热重载 Adapter 回调（设置变更时触发）=====
+  const reloadAdapter = () => {
+    const newAdapter = createAdapter();
+    agentLoop.setAdapter(newAdapter);
+  };
+
   // ===== 窗口管理 =====
   windowManager = new WindowManager();
   const mainWindow = windowManager.createWindow({
@@ -200,7 +209,7 @@ async function initialize(): Promise<void> {
   registerAllIPCHandlers(
     mainWindow, sessionService, configService, workspaceService,
     contextBuilder, agentLoop, toolRegistry, auditService,
-    sessionRecorder, memoryManager, mcpManager,
+    sessionRecorder, memoryManager, mcpManager, createAdapter,
   );
 
   // ===== 应用生命周期 =====
@@ -227,7 +236,7 @@ async function initialize(): Promise<void> {
     if (databaseService) { databaseService.close(); databaseService = null; }
   });
 
-  log.info(`MetonaAI Desktop initialized [Provider: ${provider}, Model: ${model}, Tools: ${toolRegistry.size}]`);
+  log.info(`MetonaAI Desktop initialized [Provider: ${configService.get<string>('llm.provider') ?? 'none'}, Model: ${configService.get<string>('llm.model') ?? 'none'}, Tools: ${toolRegistry.size}]`);
 }
 
 app.whenReady().then(initialize);