feat: enhance session sync and add voice input feature

- 增强会话同步：确保所有会话完全同步到新账号
  - 强制更新 model_provider 字段
  - 添加 session_index.jsonl 重建功能
  - 确保数据库 UPSERT 逻辑正确处理所有情况
- 新增语音输入功能（voice_cdp.js, voice_inject.js）
- 测试脚本和增强模块

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -1,11 +1,11 @@
 {
   "name": "codex-market",
-  "version": "1.5.10",
+  "version": "1.5.14",
   "description": "TD工具箱 / 技能商店 / 备份工具 —— 跨平台桌面客户端",
   "author": "Codex Market",
   "license": "MIT",
   "main": "electron/bootstrap.js",
-  "hotContentVersion": "1.5.10",
+  "hotContentVersion": "1.5.14",
   "scripts": {
     "start": "electron .",
     "dist": "electron-builder",