- Add PATCH /api/anime/{key}/metadata-ids endpoint to update IDs
- Add POST /api/anime/{key}/refresh-nfo endpoint to force NFO regeneration
- Add Edit Metadata IDs modal in frontend
- Add showEditMetadataModal, saveMetadataIds, refreshSeriesNfo JS functions
- Add edit-metadata-btn to series cards with database icon
- IDs validated as positive integers or null
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>