v0.3.0 — Downloads, Chromecast output, Now-Playing UX, Debian packaging

[immineal]

Summary

Ships v0.3.0 with the top community-requested features (from Reddit feedback) plus fixes and Linux distribution improvements.

Downloads

• Per-track download to FLAC / MP3 / WAV via a native file picker, with metadata tags + embedded cover art (verified with ffprobe).

Chromecast output (Linux)

• Native CASTV2 casting — no external helper. Avahi mDNS discovery, QSslSocket + hand-rolled protobuf control, and a built-in QTcpServer that streams the current track to the device.
• Covers every quality tier: serves AAC directly, remuxes FLAC (downsampling hi-res >96 kHz to fit the default receiver).
• Cast button + device picker in the player bar.

Now-Playing UX

• Shuffle-aware "Up Next" and Queue panel (a single source of truth for upcoming tracks; refreshes when shuffle toggles).
• "Playing from …" link that navigates back to the source playlist / album / mix / liked songs.

Fixes

• Tray icon blank regression — loadAppIcon() now reads the :/qt/qml/TidalWave resource prefix (moved by QTP0001 NEW), with a fallback so it can't silently break again.
• Favourites top liked song appeared twice — de-dup on append + guard overlapping load chains.
• Quality labels — Tidal-consistent Max / High / Low (was inconsistent "HI-FI"/"MASTER"), centralized in Player::qualityLabel().

Cross-platform & packaging

• Replaced hardcoded /tmp paths with QDir::tempPath() (this broke playback on Windows, not just downloads).
• Guarded MPRIS/ALSA behind Q_OS_LINUX.
• Debian package via CPack — .desktop entry, hicolor icons, and a complete Depends list (Qt6 runtime, qml6-module-*, SQLite driver, Avahi; ffmpeg as Recommends). Addresses the "dependency hunting" complaint.
• Added push/PR CI (ubuntu/windows/macos build matrix); the release workflow now attaches the .deb.

Testing

• Clean from-scratch build: 0 errors, 0 warnings.
• App verified live: loads, local playback, cast button + device picker ("Searching for devices…" with no device present), Tidal-consistent quality badge, favourites shows the top song once, shuffle reorders Up Next, "Playing from Liked Songs" navigates.
• .deb built and inspected (dpkg -c/-I): binary, desktop file, icons, and deps including libavahi-client3.
• Not testable in CI/here: end-to-end casting to a physical Chromecast (needs a device on the LAN).

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