修复用户状态问题

app/router/notification/message.py

@@ -206,12 +206,19 @@ async def get_message(
     query = select(ChatMessage).where(ChatMessage.channel_id == channel_id)
     if since > 0:
         query = query.where(col(ChatMessage.message_id) > since)
-    if until is not None:
-        query = query.where(col(ChatMessage.message_id) < until)
-
-    query = query.order_by(col(ChatMessage.message_id).desc()).limit(limit)
-    messages = (await session.exec(query)).all()
-    resp = [await ChatMessageResp.from_db(msg, session) for msg in messages]
+        # 获取 since 之后的消息，按时间正序
+        query = query.order_by(col(ChatMessage.message_id).asc()).limit(limit)
+        messages = (await session.exec(query)).all()
+        resp = [await ChatMessageResp.from_db(msg, session) for msg in messages]
+    else:
+        # 获取最新消息，先按倒序获取最新的，然后反转为时间正序
+        if until is not None:
+            query = query.where(col(ChatMessage.message_id) < until)
+        query = query.order_by(col(ChatMessage.message_id).desc()).limit(limit)
+        messages = (await session.exec(query)).all()
+        resp = [await ChatMessageResp.from_db(msg, session) for msg in messages]
+        # 反转为时间正序（最老的在前面）
+        resp.reverse()
     return resp