fix im forwarding and message list regressions

docs/IM-前后端对接文档.md

@@ -1358,7 +1358,7 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 **状态：新增。**
 
 - `POST /v1/im/messages/forward`，Body `{"mode":"separate","sources":[{"topic":"p2p...","seq":12}],"target_topics":["grp..."],"comment":"..."}`。`seq` 兼容数字和字符串；P2P 源会话也可以传对方 `usr...` 用户 ID，服务端会归一化为 P2P topic。
-- 返回每个目标和源消息的 `client_mid/seq/status`；服务端保持源顺序，重新生成目标消息，不能复用原 `seq`。
+- 返回每个目标和源消息的 `client_mid/seq/status`；`status` 取值为 `sent`、`pending`、`failed`。`pending` 表示服务端已分配 `seq/client_mid`，但 Kafka 投递结果暂不确定，客户端应按“发送中”展示，保留同一个 `Idempotency-Key` 重试或等待后续消息同步，不要立即生成第二条本地消息。服务端保持源顺序，重新生成目标消息，不能复用原 `seq`。
 - 附件必须建立新的授权引用；原消息已撤回、过期或不可见时该项失败。留言作为每个目标的一条独立文本消息发送。
 
 ### 4.20 转发—合并转发—多选状态.png
@@ -2084,10 +2084,10 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 | `GET /v1/im/favorites/{favorite_id}` | Path favorite ID | `{"favorite_id":"fav_1","type":"file","snapshot":{"file_id":"file_1","name":"a.pdf"},"source":{"topic":"grp...","seq":12},"availability":"available"}` |
 | `DELETE /v1/im/favorites/{favorite_id}` | Path favorite ID | `{"favorite_id":"fav_1","deleted":true}` |
 | `POST /v1/im/favorites/batch-delete` | `{"favorite_ids":["fav_1","fav_2"]}` | `{"items":[{"favorite_id":"fav_1","deleted":true},{"favorite_id":"fav_2","deleted":true}],"failed":[]}` |
-| `POST /v1/im/favorites/forward` | `{"favorite_ids":["fav_1"],"target_topics":["grp..."],"comment":"转给你"}` | `{"items":[{"favorite_id":"fav_1","target_topic":"grp...","status":"sent","seq":20}],"failed":[]}` |
+| `POST /v1/im/favorites/forward` | `{"favorite_ids":["fav_1"],"target_topics":["grp..."],"comment":"转给你"}` | `{"items":[{"favorite_id":"fav_1","target_topic":"grp...","status":"sent","seq":20}],"failed":[]}`；Kafka 投递结果不确定时返回 `status:"pending"`、`reason:"MESSAGE_PERSIST_PENDING"` |
 | `GET /v1/im/forward-targets?query=&cursor=` | Query only | `{"items":[{"topic":"grp...","type":"group","display_name":"项目群","avatar_file_id":"","can_receive_forward":true},{"topic":"slf","type":"file_assistant","display_name":"文件助手","can_receive_forward":true}],"next_cursor":"","has_more":false}` |
-| `POST /v1/im/messages/forward` 逐条转发 | `{"mode":"separate","sources":[{"topic":"grp...","seq":12}],"target_topics":["usr..."],"comment":""}` | `{"items":[{"source":{"topic":"grp...","seq":12},"target_topic":"p2p...","client_mid":"mid_1","seq":30,"status":"sent"}],"failed":[]}` |
-| `POST /v1/im/messages/forward` 合并转发 | `{"mode":"bundle","sources":[{"topic":"grp...","seq":12},{"topic":"grp...","seq":13}],"target_topics":["usr..."],"comment":""}` | `{"items":[{"sources":[{"topic":"grp...","seq":12},{"topic":"grp...","seq":13}],"target_topic":"p2p...","client_mid":"mid_1","seq":31,"status":"sent","mode":"bundle","bundle_id":"fbundle_1"}],"failed":[]}` |
+| `POST /v1/im/messages/forward` 逐条转发 | `{"mode":"separate","sources":[{"topic":"grp...","seq":12}],"target_topics":["usr..."],"comment":""}` | `{"items":[{"source":{"topic":"grp...","seq":12},"target_topic":"p2p...","client_mid":"mid_1","seq":30,"status":"sent"}],"failed":[]}`；Kafka 投递结果不确定时返回 `status:"pending"`、`reason:"MESSAGE_PERSIST_PENDING"` |
+| `POST /v1/im/messages/forward` 合并转发 | `{"mode":"bundle","sources":[{"topic":"grp...","seq":12},{"topic":"grp...","seq":13}],"target_topics":["usr..."],"comment":""}` | `{"items":[{"sources":[{"topic":"grp...","seq":12},{"topic":"grp...","seq":13}],"target_topic":"p2p...","client_mid":"mid_1","seq":31,"status":"sent","mode":"bundle","bundle_id":"fbundle_1"}],"failed":[]}`；Kafka 投递结果不确定时返回 `status:"pending"`、`reason:"MESSAGE_PERSIST_PENDING"` |
 | `GET /v1/im/forward-bundles/{bundle_id}?cursor=` 待实现 | Query only | `{"bundle_id":"fbundle_1","title":"聊天记录","item_count":2,"items":[{"from_display":"张三","ts":"2026-08-20T09:00:00Z","summary":"文本摘要"}],"next_cursor":""}` |
 | `POST /v1/im/security/urls/check` | `{"url":"https://example.com","source":"favorite"}` | `{"url":"https://example.com","decision":"allow","risk_level":"low","reason":"ok","source":"favorite"}` |