fix(desktop): 替换 require() 为 ES import — 修复生产构建崩溃

- connectionStore: 2 处 require() → loadConversationStore() 异步预加载 + 闭包引用
- saasStore: 1 处 require() → await import()（logout 是 async）
- llm-service: 1 处 require() → 顶层 import（无循环依赖）
- streamStore: 移除重复动态导入，统一使用顶层 useConnectionStore
- tsc --noEmit 0 errors

desktop/src/lib/llm-service.ts

@@ -16,6 +16,7 @@
 
 import { DEFAULT_MODEL_ID, DEFAULT_OPENAI_BASE_URL } from '../constants/models';
 import { createLogger } from './logger';
+import { recordLLMUsage } from './telemetry-collector';
 
 const log = createLogger('LLMService');
 
@@ -819,7 +820,6 @@ function trackLLMCall(
   error?: unknown,
 ): void {
   try {
-    const { recordLLMUsage } = require('./telemetry-collector');
     recordLLMUsage(
       response.model || adapter.getProvider(),
       response.tokensUsed?.input ?? 0,
@@ -832,7 +832,7 @@ function trackLLMCall(
       },
     );
   } catch (e) {
-    log.debug('Telemetry recording failed (SSR or unavailable)', { error: e });
+    log.debug('Telemetry recording failed', { error: e });
   }
 }
 

desktop/src/store/chat/streamStore.ts

@@ -57,7 +57,6 @@ async function tryRecoverFromAuthError(error: string): Promise<string | null> {
     const newToken = await saasClient.refreshMutex();
     if (newToken) {
       // Update kernel config with refreshed token → triggers kernel re-init via changed api_key detection
-      const { useConnectionStore } = await import('../connectionStore');
       const { getKernelClient } = await import('../../lib/kernel-client');
       const kernelClient = getKernelClient();
       const currentConfig = kernelClient.getConfig();

desktop/src/store/connectionStore.ts

@@ -30,6 +30,16 @@ import { useConfigStore } from './configStore';
 import { createLogger } from '../lib/logger';
 import { secureStorage } from '../lib/secure-storage';
 
+// 延迟加载 conversationStore 避免循环依赖
+// connect() 是 async 函数，在其中 await import() 是安全的
+let _conversationStore: typeof import('./chat/conversationStore') | null = null;
+async function loadConversationStore() {
+  if (!_conversationStore) {
+    try { _conversationStore = await import('./chat/conversationStore'); } catch { /* not loaded yet */ }
+  }
+  return _conversationStore;
+}
+
 const log = createLogger('ConnectionStore');
 
 // === Mode Selection ===
@@ -492,8 +502,8 @@ export const useConnectionStore = create<ConnectionStore>((set, get) => {
               // 优先使用 conversationStore 的 currentModel，如果设置了的话
               let preferredModel: string | undefined;
               try {
-                const { useConversationStore } = require('./chat/conversationStore');
-                preferredModel = useConversationStore.getState().currentModel;
+                const cs = await loadConversationStore();
+                preferredModel = cs?.useConversationStore.getState().currentModel;
               } catch {
                 // conversationStore 可能尚未初始化
               }
@@ -553,13 +563,9 @@ export const useConnectionStore = create<ConnectionStore>((set, get) => {
               );
               const relayClient = createSaaSRelayGatewayClient(session.saasUrl, () => {
                 // 每次调用时读取 conversationStore 的 currentModel，fallback 到第一个可用模型
-                try {
-                  const { useConversationStore } = require('./chat/conversationStore');
-                  const current = useConversationStore.getState().currentModel;
+                // 注意：这里不能用 await（同步回调），但 conversationStore 已在上方 loadConversationStore() 中加载
+                const current = _conversationStore?.useConversationStore.getState().currentModel;
                 return (current && validBrowserModelIds.has(current)) ? current : fallbackModelId;
-                } catch {
-                  return fallbackModelId;
-                }
               });
 
               set({

desktop/src/store/saasStore.ts

@@ -434,7 +434,7 @@ export const useSaaSStore = create<SaaSStore>((set, get) => {
 
       // Clear currentModel so next connection uses fresh model resolution
       try {
-        const { useConversationStore } = require('./chat/conversationStore');
+        const { useConversationStore } = await import('./chat/conversationStore');
         useConversationStore.getState().setCurrentModel('');
       } catch { /* non-critical */ }