fix: 修复 AI 会话链路与前端 type-check 错误

electron/preload/apis/ai.ts

@@ -419,7 +419,7 @@ export const aiApi = {
   /**
    * 创建 AI 对话
    */
-  createConversation: (sessionId: string, title?: string, assistantId: string): Promise<AIConversation> => {
+  createConversation: (sessionId: string, title: string | undefined, assistantId: string): Promise<AIConversation> => {
     return ipcRenderer.invoke('ai:createConversation', sessionId, title, assistantId)
   },
 

electron/preload/index.d.ts

@@ -358,7 +358,7 @@ interface AiApi {
     senderId?: number,
     keywords?: string[]
   ) => Promise<{ messages: SearchMessageResult[]; hasMore: boolean }>
-  createConversation: (sessionId: string, title?: string, assistantId: string) => Promise<AIConversation>
+  createConversation: (sessionId: string, title: string | undefined, assistantId: string) => Promise<AIConversation>
   getConversations: (sessionId: string) => Promise<AIConversation[]>
   getConversation: (conversationId: string) => Promise<AIConversation | null>
   updateConversationTitle: (conversationId: string, title: string) => Promise<boolean>

electron/preload/index.ts

@@ -11,6 +11,9 @@ import { chatApi, mergeApi } from './apis/chat'
 import { aiApi, llmApi, agentApi, embeddingApi, assistantApi, skillApi } from './apis/ai'
 import { nlpApi, networkApi, cacheApi, sessionApi } from './apis/utils'
 
+// 为渲染进程提供统一的类型入口，避免 type-only import 指向无导出的运行时代码。
+export type { PreprocessConfig, EmbeddingServiceConfig, EmbeddingServiceConfigDisplay } from './apis/ai'
+
 // Use `contextBridge` APIs to expose Electron APIs to
 // renderer only if context isolation is enabled, otherwise
 // just add to the DOM global.