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>

electron/main.js

@@ -15,6 +15,7 @@ const sessions = require("./lib/sessions");
 const providerSync = require("./lib/provider_sync");
 const router = require("./lib/router");
 const canvas = require("./lib/canvas");
+const voice = require("./lib/voice_cdp");
 const proxy = require("./lib/proxy");
 const memory = require("./lib/memory");
 const { extractZip } = require("./lib/zip");
@@ -729,8 +730,7 @@ function skillCatalog() {
 async function skillInstall(skill) {
   const url = skill.origin;
   if (!url) throw new Error("该技能没有可用的下载地址");
-  const safeName = String(skill.name || "skill")
-    .replace(/[^\w一-龥.-]+/g, "-").replace(/^-+|-+$/g, "").slice(0, 80) || "skill";
+  const safeName = safeSkillDir(skill.name);
   const storeDir = path.join(SKILL_STORE, safeName);
   const codexLink = path.join(codex.CODEX_HOME, "skills", safeName);
   log(`下载技能 ${skill.name} …`);
@@ -850,9 +850,10 @@ function readSkillMeta(skillDir, fallbackName) {
   return meta;
 }
 
-// 把名称规整成磁盘技能目录名（与 skillInstall 的 safeName / renderer 的 safeSkillDir 同算法）
+// 把名称规整成磁盘技能目录名（与 renderer 的 safeSkillDir 同算法）。统一小写，避免同一技能的大小写变体重复安装、软链名与实体名错位。
 function safeSkillDir(name) {
   return (String(name || "skill")
+    .toLowerCase()
     .replace(/[^\w一-龥.-]+/g, "-").replace(/^-+|-+$/g, "").slice(0, 80)) || "skill";
 }
 
@@ -1330,6 +1331,19 @@ ipcMain.handle("canvas-run", (e, { kind, params }) =>
 ipcMain.handle("canvas-groups", () => canvas.groups());
 ipcMain.handle("canvas-models", (_e, { groupId }) => canvas.listModels(groupId));
 
+// —— Codex 语音输入注入（CDP）——
+ipcMain.handle("voice-status", () => voice.status());
+ipcMain.handle("voice-connect", (e, opts) =>
+  voice.connect((s) => {
+    try {
+      e.sender.send("voice-status", s);
+    } catch {}
+  }, opts || {})
+);
+ipcMain.handle("voice-disconnect", () => voice.disconnect());
+ipcMain.handle("voice-stt-info", () => voice.sttInfo());
+ipcMain.handle("voice-probe-stt", async () => voice.probeStt());
+
 // —— 全局 / 系统代理 ——
 ipcMain.handle("proxy-status", async () => proxy.status());
 ipcMain.handle("proxy-get-config", async () => proxy.getConfig());