Changes:

• Rename to Jellyfin Desktop
• Change launcher/taskbar/dock name to "Jellyfin"
• Upgrade to Qt 6
• Add MpvQt library dependency
• Change configuration paths (settings from Jellyfin Media Player will NOT be migrated)
• Add MPRIS support for media control
• Add initial multi-profile support (CLI flags only)
• Require D-Bus for screensaver management
• Show movie/show backdrop before playback starts (matches jellyfin-web)
• Add option to force using the HTML5 player
• Add option to disable UI zoom
• Add ability to exit fullscreen mode with Escape key
• Add log rotation (10 most-recent)
• Add --config-dir and --log-level CLI options
• Bundle native/ assets directly into application binary (no more separate files)
• Change startup server connection to retry indefinitely (cancelable with Escape)
• Change app ID to org.jellyfin.JellyfinDesktop
• Update playback rate options (matches jellyfin-web)
• Fix various window geometry, maximize, and fullscreen window issues
• Fix audio mute not persisting between tracks
• Fix audio to only fade out when stopping playback (matches jellyfin-web)
• Fix cursor sometimes not hiding in fullscreen
• Fix server base URL determination (matches jellyfin-web)
• Fix CORS and CSP (no more security bypass hacks)
• Use XDG runtime directory for input and singleton sockets
• Various bug fixes and optimizations