feat(voice-transcribe): 优化语音转写流程并增强数据库缓存机制

- 添加 createTime 参数到语音转写接口，支持更精确的消息定位
- 实现 media.db 列表缓存机制（5分钟TTL），减少重复查询开销
- 添加 media.db 表结构信息缓存，提升数据库操作效率
- 优化语音缓存目录获取逻辑，支持自定义缓存路径配置
- 重构语音数据获取实现，绕过WCDB的buggy getVoiceData方法
- 移除冗余的调试日志，提升代码整洁度
- 删除不再使用的 silk_v3_decoder.exe 文件
- 优化数据库连接流程，后台预热缓存提升响应速度

src/pages/ChatPage.tsx

@@ -1784,7 +1784,16 @@ function MessageBubble({ message, session, showTime, myAvatarUrl, isGroupChat, o
         throw error
       }
 
-      const result = await window.electronAPI.chat.getVoiceTranscript(session.username, String(message.localId))
+      const result = await window.electronAPI.chat.getVoiceTranscript(
+        session.username,
+        String(message.localId),
+        message.createTime
+      )
+      console.log('[ChatPage] 调用转写:', {
+        sessionId: session.username,
+        msgId: message.localId,
+        createTime: message.createTime
+      })
       if (result.success) {
         const transcriptText = (result.transcript || '').trim()
         voiceTranscriptCache.set(voiceTranscriptCacheKey, transcriptText)

src/types/electron.d.ts

@@ -96,7 +96,7 @@ export interface ElectronAPI {
     getImageData: (sessionId: string, msgId: string) => Promise<{ success: boolean; data?: string; error?: string }>
     getVoiceData: (sessionId: string, msgId: string, createTime?: number, serverId?: string | number) => Promise<{ success: boolean; data?: string; error?: string }>
     resolveVoiceCache: (sessionId: string, msgId: string) => Promise<{ success: boolean; hasCache: boolean; data?: string }>
-    getVoiceTranscript: (sessionId: string, msgId: string) => Promise<{ success: boolean; transcript?: string; error?: string }>
+    getVoiceTranscript: (sessionId: string, msgId: string, createTime?: number) => Promise<{ success: boolean; transcript?: string; error?: string }>
     onVoiceTranscriptPartial: (callback: (payload: { msgId: string; text: string }) => void) => () => void
   }