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/lib/provider_sync.js

@@ -234,8 +234,12 @@ function buildThreadUpsertSql(records, target, cols) {
   const updateSet = [];
   for (const c of desired) {
     if (c === "id") continue;
-    if (c === "has_user_event") updateSet.push(`${c}=CASE WHEN excluded.${c}=1 THEN 1 ELSE threads.${c} END`);
-    else if (["cwd", "first_user_message", "preview", "thread_source"].includes(c)) {
+    // 【增强】model_provider 强制更新为目标 provider（切账号核心逻辑）
+    if (c === "model_provider") {
+      updateSet.push(`${c}=${sql(target)}`);
+    } else if (c === "has_user_event") {
+      updateSet.push(`${c}=CASE WHEN excluded.${c}=1 THEN 1 ELSE threads.${c} END`);
+    } else if (["cwd", "first_user_message", "preview", "thread_source"].includes(c)) {
       updateSet.push(`${c}=CASE WHEN COALESCE(excluded.${c},'')<>'' THEN excluded.${c} ELSE threads.${c} END`);
     } else if (c === "title") {
       updateSet.push(`${c}=CASE WHEN COALESCE(threads.${c},'')='' OR threads.${c}='(无标题对话)' THEN excluded.${c} ELSE threads.${c} END`);
@@ -252,6 +256,7 @@ function buildThreadUpsertSql(records, target, cols) {
       `ON CONFLICT(id) DO UPDATE SET ${updateSet.join(",")};`
     );
   }
+  // 【增强】确保数据库中所有会话的 provider 都更新为目标（兜底逻辑）
   lines.push(`UPDATE threads SET model_provider=${sql(target)} WHERE COALESCE(model_provider,'')<>${sql(target)};`);
   lines.push("COMMIT;");
   return lines.join("\n") + "\n";
@@ -288,6 +293,59 @@ function ts() {
   return `${d.getFullYear()}${p(d.getMonth() + 1)}${p(d.getDate())}-${p(d.getHours())}${p(d.getMinutes())}${p(d.getSeconds())}`;
 }
 
+// 【增强】重建 session_index.jsonl：确保所有会话都在索引中（切账号后必要）
+function rebuildSessionIndex(records, log = () => {}) {
+  if (!records || !records.length) {
+    log("索引重建：无会话记录，跳过");
+    return { rebuilt: 0 };
+  }
+  // 备份旧索引
+  if (fs.existsSync(SESSION_INDEX)) {
+    const backup = SESSION_INDEX + ".bak-" + ts();
+    try {
+      fs.copyFileSync(SESSION_INDEX, backup);
+      log(`已备份旧索引 → ${path.basename(backup)}`);
+    } catch (e) {
+      log(`索引备份失败：${e.message || e}`);
+    }
+  }
+  // 读取现有索引，保留用户重命名的标题
+  const existingTitles = {};
+  try {
+    const lines = fs.readFileSync(SESSION_INDEX, "utf-8").split("\n");
+    for (const line of lines) {
+      if (!line.trim()) continue;
+      try {
+        const d = JSON.parse(line);
+        if (d.id && d.thread_name) existingTitles[d.id] = d.thread_name;
+      } catch {}
+    }
+  } catch {}
+  // 重建索引：每个会话一行 JSON
+  const lines = [];
+  for (const r of records) {
+    if (!r.id) continue;
+    const indexEntry = {
+      id: r.id,
+      thread_name: existingTitles[r.id] || r.title || "(无标题对话)",
+      project_path: r.cwd || null,
+      created_at: new Date(r.created_at_ms).toISOString(),
+      source: r.source || "vscode",
+      archived: r.archived ? true : false,
+    };
+    lines.push(JSON.stringify(indexEntry));
+  }
+  // 写入新索引
+  try {
+    fs.writeFileSync(SESSION_INDEX, lines.join("\n") + "\n", "utf-8");
+    log(`索引重建完成：${lines.length} 条会话`);
+    return { rebuilt: lines.length };
+  } catch (e) {
+    log(`索引重建失败：${e.message || e}`);
+    return { rebuilt: 0, error: e.message || String(e) };
+  }
+}
+
 async function syncProviderToCurrent(log = () => {}, onProgress = () => {}) {
   if (codexRunning()) throw new Error("检测到 Codex 正在运行，请先完全退出 Codex 再同步。");
   const target = targetProvider();
@@ -394,6 +452,11 @@ async function syncProviderToCurrent(log = () => {}, onProgress = () => {}) {
       }
     }
     log(`数据库更新：provider ${provRows} 行、has_user_event ${ueRows} 行、新增线程 ${insertedRows} 行、项目索引 +${projectState.addedProjects}`);
+
+    // 【增强】4) 重建 session_index.jsonl，确保所有会话都在索引中
+    onProgress({ phase: "重建索引", done: 0, total: 0 });
+    const indexResult = rebuildSessionIndex(records, log);
+
     onProgress({ phase: "完成", done: 0, total: 0 });
 
     return {
@@ -407,6 +470,7 @@ async function syncProviderToCurrent(log = () => {}, onProgress = () => {}) {
       insertedRows,
       projectRows: projectState.addedProjects,
       projectlessRemoved: projectState.removedProjectless,
+      indexRebuilt: indexResult.rebuilt || 0,
       backup,
     };
   }
@@ -457,6 +521,11 @@ async function syncProviderToCurrent(log = () => {}, onProgress = () => {}) {
     }
   }
   log(`数据库更新：provider ${provRows} 行、has_user_event ${ueRows} 行、cwd ${cwdRows} 行`);
+
+  // 【增强】4) 重建 session_index.jsonl，确保所有会话都在索引中
+  onProgress({ phase: "重建索引", done: 0, total: 0 });
+  const indexResult = rebuildSessionIndex(records, log);
+
   onProgress({ phase: "完成", done: 0, total: 0 });
 
   return {
@@ -470,6 +539,7 @@ async function syncProviderToCurrent(log = () => {}, onProgress = () => {}) {
     insertedRows: 0,
     projectRows: projectState.addedProjects,
     projectlessRemoved: projectState.removedProjectless,
+    indexRebuilt: indexResult.rebuilt || 0,
     backup,
   };
 }