feat(fullscreen-player): rebuilt static fullscreen player (#1001)

* feat(player): static media-center fullscreen player (v1)

New lean fullscreen player: sharp full-bleed background (artist photo, cover
fallback), no blur / no continuous animations. Bottom-left big cover bottom-
flush with a full-width semi-transparent text bar (title with queue position,
artist, year/genre + rating stars, next-up); control row of transport · center
time · actions; full-width seekbar; live clock. Only the seekbar, time readout
and clock update at runtime, each owning its state (no per-tick re-render).
Reuses FsSeekbar/FsPlayBtn, the cover/artist hooks, idle-fade and queue
helpers. Wired in AppShell; old player kept for A/B.

* feat(fullscreen-player): true waveform seekbar instead of thin bar

Replace FsSeekbar with the real WaveformSeek (cucadmuh's idea). The taller
canvas grows the bottom cluster upward, shifting the info/control rows up.
Height clamped to 32-52px.

* feat(fullscreen-player): up-next popover + control-bar styling

- Queue button opens a semi-transparent 'Up next' popover anchored bottom
  right; clicking a row jumps to that queue item.
- Larger bottom-right action buttons.
- Control row gets its own darker semi-transparent bar (touches the info bar
  above) for contrast; play button matches the plain transport buttons
  (no white circle, same size).

* feat(fullscreen-player): high-res (2000px) background cover

Fetch the full-screen background cover at the 2000px tier via the existing
on-demand fullRes path (same getCoverArt fetch, saved as a high-res WebP
outside the backfill pipeline) instead of the low-res 500px pipeline tier.
usePlaybackCoverArt now forwards a fullRes option to useCoverArt.

* feat(fullscreen-player): scrolling lyrics overlay + control-bar polish

- Lyrics button next to Queue toggles a centered, dark semi-transparent
  scrolling-lyrics overlay (reuses FsLyricsApple).
- Control bar darkened to match the lyrics overlay (0.88).
- Close button sized down to harmonize with the clock.

* feat(fullscreen-player): make rating stars clickable

The rating stars next to the year were display-only. Wire them to
queueSongRating (same path as the player bar / context menu): click to
set, click the current value to clear, with a hover preview. Keeps the
lucide outline look to match the rest of the control bar.

* fix(fullscreen-player): stable, high-res album cover

The foreground cover was keyed per track, so Navidrome's per-track
`mf-<id>` coverArt re-triggered the distinct-disc heuristic and reloaded
the cover on every song change within the same album. Key it on albumId
(via useAlbumCoverRef) so it stays put while the album is unchanged.

It also used the low-res tier; reuse the fullRes 2000px cover already
fetched for the background so the foreground is crisp and both share a
single fetch/decode.

* refactor(fullscreen-player): remove the old player and its settings

The static rebuild is now the only fullscreen player. Delete the old
FullscreenPlayer component, its old-only parts (FsArt, FsPortrait,
FsSeekbar, FsLyricsRail, FsLyricsMenu, useFsDynamicAccent) and its test.
Remove the now-orphaned settings (showFullscreenLyrics, fsLyricsStyle,
showFsArtistPortrait, fsPortraitDim) along with the Appearance
'Fullscreen player' section and its search entry. The new player always
shows the artist photo with cover fallback and has its own lyrics toggle.

Shared building blocks used by the static player (FsLyricsApple,
FsPlayBtn, FsClock, FsTimeReadout, FsQueueModal, useFsArtistPortrait)
are kept.

* i18n(fullscreen-player): translate the new player's strings

Wire the static player's previously English-only strings through i18n
across all 9 locales: now-playing label, track position, up-next label,
queue/lyrics/shuffle controls, and the queue overlay (title, empty,
close). Reuses existing queue.title / common.close keys; adds six new
keys to the player namespace.

* docs(changelog): note fullscreen player rebuild (#1001)

CHANGELOG.md

@@ -21,6 +21,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 
+### Fullscreen player — rebuilt for much lower CPU/RAM
+
+**By [@Psychotoxical](https://github.com/Psychotoxical), PR [#1001](https://github.com/Psychotoxical/psysonic/pull/1001)**
+
+* The previous fullscreen player was a heavy CPU and memory consumer — constant repaints from animated/blurred backgrounds and effects kept the GPU and a CPU core busy the whole time it was open. It has been **completely replaced** by a static, low-overhead screen: only the seekbar, elapsed time, and clock update live; everything else stays still.
+* Features: sharp high-res background, large album cover, true waveform seekbar, up-next queue popover, scrolling synced lyrics, clickable rating stars, and an on-screen clock.
+* The artist photo now always shows as the background (album cover as fallback); the old **Appearance → "Fullscreen player"** settings were removed.
+
+
+
 ## Changed
 
 ### Dependencies — npm and Rust refresh