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Frank Stellmacher
5b37ab70f1
* perf(tracklist): replace animated EQ-bar + active-row pulse with static icon The currently-playing track in any tracklist (AlbumDetail, ArtistDetail, PlaylistDetail, Favorites, RandomMix) was rendered with two animations on top of an already-busy DOM: - `.track-row.active` ran `track-pulse` 3s opacity 1 → 0.6 → 1 infinite on the entire row subtree (title button, several Lucide icons, star rating SVGs, hover affordances). Opacity is a compositor property, but on WebKitGTK without compositing — Linux + NVIDIA proprietary + WEBKIT_DISABLE_COMPOSITING_MODE=1 — every animated row falls back to a full software repaint of the subtree per frame. - The "now playing" indicator in the track-number cell was three `<span class="eq-bar">` siblings with `transform: scaleY()` keyframes (`eq-bounce`), each on its own delay/duration. Same composite story: three software-repainted layers per frame, every frame. On AlbumDetail (long tracklist + cover-art header background + the already-running WaveformSeek progress rAF in the player bar) the combined cost held the WebProcess at ~80 % CPU with 1.2 GB RSS for the entire duration of playback. CPU dropped immediately on pause/stop; on Composers / Settings (no track rows) the symptom never appeared. Profiler confirmed continuous Layout & Rendering work synchronised with isPlaying, not the canvas itself. Replace both animations with static visuals: - `.track-row.active` keeps the `--accent-dim` background, drops the pulse animation entirely. - The "now playing" indicator becomes a single Lucide `AudioLines` icon (four vertical bars of different heights — reads as an EQ icon, no animation, one SVG per active row instead of three animated spans). `.eq-bars` className now only sets the accent colour. Cleanup: dead `@keyframes track-pulse`, `@keyframes eq-bounce`, `.eq-bars.paused` rule, plus a duplicate `.eq-bar` block in theme.css (with a `wave` keyframe that was being shadowed by components.css and had no other consumers). No behaviour change beyond removing the animation; the row is still visibly the active one and the icon still marks the playing track. * docs: CHANGELOG entry for tracklist animation perf fix (PR #488)