- submit_upload.dspy: frontend form handler returning bricks Message widget
with asset_id, status, and '查询处理状态' button
- submit_query_status.dspy: frontend status query returning Message widget
with current status, retry button when still processing
- upload_asset.ui: use submit_upload.dspy + submited bind (was missing)
- External APIs (rl_upload.dspy, rl_status.dspy) unchanged for downstream systems
- get_org_groups.dspy: show name if available, fallback to vendor_group_id
- upload_asset.ui: change source_url from text textarea to file input (accept image/audio/video)
- rl_upload.dspy: auto-detect asset_type from file extension, server-side media type validation
