feat: Lightning channel backup, Web5 mobile tab active, file path fix
Task 14: Lightning Channel Backup
- New lnd.export-channel-backup RPC — exports SCB (Static Channel Backup)
- Settings UI: "Lightning Channel Backup" section with export + copy
- Returns base64 backup data, channel count, timestamp
Web5 mobile tab active state
- Fixed combined tab matching for Web5: includes /web5, /federation, /mesh routes
- Previously only matched /cloud and /server (wrong branch)
Content file path fix
- Allow forward slashes in filenames for subdirectories (Music/song.mp3)
- Still block .., \, null bytes, hidden files, absolute paths
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
c5417640a2