fix: stabilize preview seekbar, post-sleep audio recovery, and card hover behavior (#476)

* fix(player): freeze main seekbar during track preview

Preview pauses the main sink in Rust while isPlaying stays true in the
store, so WaveformSeek's interpolation rAF must not advance progress.

* fix(audio): recover output after sleep and stalled streams

Add platform-specific post-sleep recovery hooks for Windows and Linux, and add a watchdog that reopens the output stream when playback is active but sample progress stalls, so audio can recover without restarting the app.

* fix(ui): remove card hover lift and smooth artwork zoom

Remove vertical hover translation from album and artist cards, and move image fade transition out of inline styles so cover zoom uses CSS timing consistently.

* fix(player): prevent seekbar jump after preview ends

Reset interpolation anchor timing when preview freeze state changes so the main seekbar does not momentarily jump forward before resyncing.

* fix(audio): reduce false watchdog recoveries and add diagnostics

Arm stalled-output recovery only after long poll gaps that suggest sleep/resume, and add detailed watcher logs for arm/clear/trigger paths to diagnose unintended stream reopens.

* chore(ui): drop card GPU hints and clarify macOS sleep scope

Remove translateZ and will-change hints from album and artist cover images to avoid per-card compositing overhead on software-composited Linux paths, and document why post-sleep recovery hooks currently target only Windows and Linux.

* docs(audio): document intentional Win32 callback pointer lifetime

Add inline rationale for the two Box::into_raw pointers in Windows suspend/resume registration so future maintenance does not treat the process-lifetime pointers as accidental leaks.

* docs(changelog): summarize playback stability updates for PR #476

Add a high-level changelog entry for preview seekbar fixes, sleep/wake audio recovery hooks and watchdog diagnostics, and card-hover stability adjustments from PR #476.

* docs(contributors): add cucadmuh entry for PR #476

Logs the post-sleep audio recovery, preview-seekbar fixes and card
hover stability work in the Settings → System → Contributors list.

CHANGELOG.md

@@ -115,6 +115,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * **Double-click** on the tray icon opens (or focuses) the main window without a spurious **context-menu** interaction; tray module import cleanup.
 
+### Playback stability — preview seekbar, sleep/wake recovery, and card-hover jitter
+
+**By [@cucadmuh](https://github.com/cucadmuh), PR [#476](https://github.com/Psychotoxical/psysonic/pull/476)**
+
+* **Preview seekbar:** while Rust preview playback pauses the main sink, the main seekbar no longer extrapolates forward, and preview end no longer causes a brief forward jump before snapping back.
+* **Sleep/wake audio recovery:** added post-sleep output reopen hooks for **Windows** (power notifications) and **Linux** (logind `PrepareForSleep` wake signal), plus a guarded fallback watchdog path and richer runtime diagnostics.
+* **False-positive mitigation:** the watchdog now arms only after a long poll gap (sleep/resume-like condition) and logs arm/clear/trigger decisions, reducing unexpected stream reopens during normal playback.
+* **Card hover stability:** removed vertical lift on album/artist/base cards to avoid pointer-edge pulsation, kept artwork zoom smooth, and dropped per-card GPU layer hints that could regress software-composited Linux paths.
+
 ## [1.45.0] - 2026-05-04
 
 ## Added