- Add Mega-Debrid API support (connectUser + getLink endpoints)
- API mode preferred by default, with automatic web fallback on failure
- User toggle "Mega-Debrid bevorzugt über API" in settings UI
- Provider labels now show source: "Mega-Debrid (API)" or "Mega-Debrid (Web)"
- sourceLabel propagated through all provider result paths
- API session token cached for 20 minutes with auto-invalidation
- Remove megaWebUnrestrict requirement for Mega-Debrid provider config
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>