everything works

fish_api/app/routers/biomass.py

@@ -178,7 +178,8 @@ async def get_sonar_video(
     settings: Settings = Depends(get_settings),
     client_id: str = Depends(_resolve_client_id),
 ):
-    """声呐视频：与水面相同经 ffmpeg 转 H.264 后托管在 /media/；整段一个文件，每次返回同一 `video_path` URL。"""
+    """声呐视频：经 ffmpeg 切片（顺序完整块或末尾 N 秒，见 BIOMASS_SONAR_SLICE_ORDER）后
+    托管在 /media/；每次返回最近成功发布的 ``video_path`` URL。"""
     video_path = await get_sonar_video_public_url(settings, client_id)
     return JSONResponse(
         content={