Add URI scheme handler registration for OAuth flow implementation:
- Register x-scheme-handler/qbz in .desktop files
- Add %u parameter to Exec for URL handling
- Add OpenURI portal permission in Flatpak manifest
This enables OAuth PKCE flows for Spotify and other providers
to redirect back to the application after browser authentication.
Files modified:
- packaging/arch/qbz.desktop
- packaging/aur/qbz.desktop
- packaging/flatpak/com.blitzkriegfc.qbz.desktop
- packaging/flatpak/com.blitzkriegfc.qbz.yml
vicrodh