- Replace plaintext JSON export with encrypted binary format (JDownloader 2 style)
- Fixed app-internal key, works on any machine without password
- Export now includes ALL credentials (no more ***-masking), session AND history
- Add debridLinkApiKeys, linkSnappy credentials to sensitive keys list
- Backward-compatible import: auto-detects legacy JSON backups
- File extension changed from .json to .mdd
- MDD1 magic bytes + random IV + GCM auth tag for integrity
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
