feat: support batch message recall

docs/IM-前后端对接文档.md

@@ -1418,7 +1418,8 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 | `PATCH /v1/im/conversations/{topic}/settings` 待实现 | `{"pinned":true,"mute_notifications":false,"version":1}` | `{"pinned":true,"mute_notifications":false,"message_retention":"default","blocked":false,"remark":"","version":2}` |
 | `GET /v1/im/conversations/{topic}/messages` 待实现 | Query `?since=12&limit=20` | `{"topic":"p2p...","items":[{"seq":13,"from":"usr...","ts":"2026-08-20T09:00:00Z","head":{"x-im-type":"text"},"content":{"text":"你好"}}],"next_cursor":""}` |
 | `PUT /v1/im/topics/{topic}/draft` 待实现 | `{"content":"未发送草稿","version":1}` | `{"topic":"grp...","content":"未发送草稿","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
-| `POST /v1/im/topics/{topic}/messages/{seq}/recall` | `{}`；可选 `{"version":1,"reason":"mistake"}` | `{"topic":"grp...","seq":12,"status":"recalled","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
+| `POST /v1/im/topics/{topic}/messages/{seq}/recall` | 单条撤回；`topic` 可传 `p2p...` 或 `grp...`；Body `{}`，可选 `{"version":1,"reason":"mistake"}` | `{"topic":"grp...","seq":12,"status":"recalled","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
+| `POST /v1/im/topics/{topic}/messages/recall` | 多选批量撤回；`{"items":[{"seq":12,"version":1},{"seq":13}],"reason":"mistake"}`；`items` 1～50 条，`version` 可选 | `{"topic":"grp...","items":[{"topic":"grp...","seq":12,"status":"recalled","version":2,"updated_at":"2026-08-20T09:00:00Z"},{"seq":13,"status":"failed","http":409,"code":30006,"reason":"VERSION_CONFLICT","message":"message version conflict"}]}` |
 | `POST /v1/im/topics/{topic}/messages/{seq}/revisions` | `{"content":{"text":"修改后的文本"},"client_mid":"mid_1","version":1}` | `{"topic":"grp...","seq":12,"status":"edited","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
 | `GET /v1/im/topics/{topic}/messages/{seq}/receipts?cursor=` | Query only | `{"topic":"grp...","seq":12,"items":[{"user_id":"usr...","read_at":"2026-08-20T09:00:00Z","recv_at":"2026-08-20T08:59:00Z"}],"next_cursor":""}` |
 | `GET /v1/im/topics/{topic}/messages/search?q=&type=text&cursor=` | Query only | `{"topic":"grp...","items":[{"seq":12,"from":"usr...","ts":"2026-08-20T09:00:00Z","snippet":"命中的文本","matches":[{"start":0,"end":2}]}],"next_cursor":""}` |
@@ -1426,7 +1427,7 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 | `GET /v1/im/topics/{topic}/messages/{seq}/context?before=20&after=20` | Query only | `{"topic":"grp...","anchor_seq":12,"items":[{"seq":11,"content":{"text":"上一条"}},{"seq":12,"content":{"text":"命中消息"}}]}` |
 | `GET /v1/im/topics/{topic}/media?type=image&cursor=` | Query only | `{"topic":"grp...","items":[{"seq":12,"thumbnail_file_id":"file_thumb","file_id":"file_img","width":1080,"height":720,"ts":"2026-08-20T09:00:00Z","availability":"available"}],"next_cursor":""}` |
 
-消息撤回和编辑成功后，Topic 在线成员会收到 0.5.4.6 定义的 `info.what="im"` 业务事件：`message.recalled` 或 `message.edited`。前端收到后按 `topic + seq + version` 刷新本地消息，不要等待用户重新进入会话才更新。
+消息撤回和编辑成功后，Topic 在线成员会收到 0.5.4.6 定义的 `info.what="im"` 业务事件：`message.recalled` 或 `message.edited`。批量撤回按成功项逐条产生 `message.recalled` 事件；失败项不会产生事件。前端收到后按 `topic + seq + version` 刷新本地消息，不要等待用户重新进入会话才更新。
 
 ## 5. 通讯录、好友关系与黑名单
 

docs/对接文档最新/IM-前后端对接文档.md

@@ -1377,7 +1377,8 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 | `PATCH /v1/im/conversations/{topic}/settings` 待实现 | `{"pinned":true,"mute_notifications":false,"version":1}` | `{"pinned":true,"mute_notifications":false,"message_retention":"default","blocked":false,"remark":"","version":2}` |
 | `GET /v1/im/conversations/{topic}/messages` 待实现 | Query `?since=12&limit=20` | `{"topic":"p2p...","items":[{"seq":13,"from":"usr...","ts":"2026-08-20T09:00:00Z","head":{"x-im-type":"text"},"content":{"text":"你好"}}],"next_cursor":""}` |
 | `PUT /v1/im/topics/{topic}/draft` 待实现 | `{"content":"未发送草稿","version":1}` | `{"topic":"grp...","content":"未发送草稿","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
-| `POST /v1/im/topics/{topic}/messages/{seq}/recall` | `{}`；可选 `{"version":1,"reason":"mistake"}` | `{"topic":"grp...","seq":12,"status":"recalled","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
+| `POST /v1/im/topics/{topic}/messages/{seq}/recall` | 单条撤回；`topic` 可传 `p2p...` 或 `grp...`；Body `{}`，可选 `{"version":1,"reason":"mistake"}` | `{"topic":"grp...","seq":12,"status":"recalled","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
+| `POST /v1/im/topics/{topic}/messages/recall` | 多选批量撤回；`{"items":[{"seq":12,"version":1},{"seq":13}],"reason":"mistake"}`；`items` 1～50 条，`version` 可选 | `{"topic":"grp...","items":[{"topic":"grp...","seq":12,"status":"recalled","version":2,"updated_at":"2026-08-20T09:00:00Z"},{"seq":13,"status":"failed","http":409,"code":30006,"reason":"VERSION_CONFLICT","message":"message version conflict"}]}` |
 | `POST /v1/im/topics/{topic}/messages/{seq}/revisions` | `{"content":{"text":"修改后的文本"},"client_mid":"mid_1","version":1}` | `{"topic":"grp...","seq":12,"status":"edited","version":2,"updated_at":"2026-08-20T09:00:00Z"}` |
 | `GET /v1/im/topics/{topic}/messages/{seq}/receipts?cursor=` | Query only | `{"topic":"grp...","seq":12,"items":[{"user_id":"usr...","read_at":"2026-08-20T09:00:00Z","recv_at":"2026-08-20T08:59:00Z"}],"next_cursor":""}` |
 | `GET /v1/im/topics/{topic}/messages/search?q=&type=text&cursor=` | Query only | `{"topic":"grp...","items":[{"seq":12,"from":"usr...","ts":"2026-08-20T09:00:00Z","snippet":"命中的文本","matches":[{"start":0,"end":2}]}],"next_cursor":""}` |
@@ -1385,7 +1386,7 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 | `GET /v1/im/topics/{topic}/messages/{seq}/context?before=20&after=20` | Query only | `{"topic":"grp...","anchor_seq":12,"items":[{"seq":11,"content":{"text":"上一条"}},{"seq":12,"content":{"text":"命中消息"}}]}` |
 | `GET /v1/im/topics/{topic}/media?type=image&cursor=` | Query only | `{"topic":"grp...","items":[{"seq":12,"thumbnail_file_id":"file_thumb","file_id":"file_img","width":1080,"height":720,"ts":"2026-08-20T09:00:00Z","availability":"available"}],"next_cursor":""}` |
 
-消息撤回和编辑成功后，Topic 在线成员会收到 0.5.4.6 定义的 `info.what="im"` 业务事件：`message.recalled` 或 `message.edited`。前端收到后按 `topic + seq + version` 刷新本地消息，不要等待用户重新进入会话才更新。
+消息撤回和编辑成功后，Topic 在线成员会收到 0.5.4.6 定义的 `info.what="im"` 业务事件：`message.recalled` 或 `message.edited`。批量撤回按成功项逐条产生 `message.recalled` 事件；失败项不会产生事件。前端收到后按 `topic + seq + version` 刷新本地消息，不要等待用户重新进入会话才更新。
 
 ## 5. 通讯录、好友关系与黑名单