- Update 'fetchWithRetry' in api.js to respect Retry-After header and use exponential backoff for 429 errors.
- Add 300ms delay between requests in CSV import loop to reduce load.
- Implements pagination in getPlaylist to support large playlists (>100 tracks).
- Reworks instance management to support separate api and streaming instance groups.
- Updates instances.json to the new grouped structure.
- Refactors apiSettings for smart incremental speed testing and type-aware caching.
- Parallelizes speed tests using appropriate endpoints (/artist/ for API, /track/ for Streaming).
- Updates Settings UI to display and manage both API and Streaming instance groups.
- Backfill album release date from tracks if missing in API response.
- Gracefully handle invalid or missing dates in UI rendering.
- Fix potential NaN in download folder naming due to invalid dates.