fix: 修复桌面集成失效 + 清理死代码

- main.ts: window.__metonaBridge → window.metonaDesktop（与 preload.ts 对齐）
- 删除 DesktopBridge 接口和 __metonaBridge 类型（从未使用）
- 删除 extractDocument（定义了但无调用）
- 删除 logIPC（导出了但零引用）
- 删除 getMessagesContainer（导出了但无调用）
- SAFE_DATA_TYPES 去掉多余的 export
- vite.config.ts 移除未使用的 server 配置

src/renderer/services/document-processor.ts

@@ -58,10 +58,6 @@ function splitSentences(text: string): string[] {
   return parts.filter(p => p.trim()).map(p => p.trim() + ' ');
 }
 
-export function extractDocument(content: string, filename: string): { text: string; filename: string } {
-  return { text: content, filename };
-}
-
 export function createChunkMetadata(chunk: string, index: number, docId: string, filename: string) {
   return {
     id: `${docId}_chunk_${index}`,

src/renderer/services/log-service.ts

@@ -183,5 +183,4 @@ export function logSession(action: string, detail?: string): void { addLog('info
 export function logMemory(action: string, detail?: string): void { addLog('debug', `记忆: ${action}`, detail); }
 export function logRAG(action: string, detail?: string): void { addLog('info', `RAG: ${action}`, detail); }
 export function logSetting(key: string, value: string): void { addLog('debug', `设置: ${key}`, value); }
-export function logIPC(action: string, detail?: string): void { addLog('debug', `IPC: ${action}`, detail); }
 export function logInit(msg: string): void { addLog('info', `初始化: ${msg}`); }