fix: 优化云同步功能，自动去除掉非首个空会话，避免多个空会话在中间，更方便管理

app/utils/sync.ts

@@ -131,10 +131,21 @@ const MergeStates: StateMerger = {
 
     const finalIds: Record<string, any> = {};
     localState.sessions = localState.sessions.filter((localSession) => {
+      // 去除掉重复的会话
       if (finalIds[localSession.id]) {
         return false;
       }
       finalIds[localSession.id] = true;
+
+      // 去除掉非首个空会话，避免多个空会话在中间，不方便管理
+      if (
+        localSession.messages.length === 0 &&
+        localSession != localState.sessions[0]
+      ) {
+        return false;
+      }
+
+      // 去除云端删除并且删除时间小于本地修改时间的会话
       return (
         (remoteDeletedSessionIds[localSession.id] || -1) <=
         localSession.lastUpdate