fix(player): persist player prefs outside quota-bound queue blob (#958)

* fix(player): persist volume/repeat in dedicated localStorage key

Player prefs were bundled with the full queue blob in psysonic-player; after
thin-state #872 a large queue can exceed the quota and safeStorage silently
drops every write, so volume and repeat mode stopped surviving restarts.
Move them to psysonic_player_prefs, gate main-blob writes until rehydrate,
and sync volume to the Rust engine on startup.

* fix(player): split queue visibility and Last.fm cache from main persist blob

Move isQueueVisible and lastfmLovedCache to dedicated localStorage keys so
they keep saving when psysonic-player hits the quota on large queues. Include
the new keys in settings backup export.

* docs: note player prefs persist fix in CHANGELOG and credits (PR #958)

CHANGELOG.md

@@ -406,6 +406,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Fixed
 
+### Player — prefs survive restart when queue persist hits quota
+
+**By [@cucadmuh](https://github.com/cucadmuh), reported by norp on the Psysonic Discord, PR [#958](https://github.com/Psychotoxical/psysonic/pull/958)**
+
+* Volume, repeat mode, queue panel visibility, and the Last.fm loved-track cache no longer depend on the quota-bound `psysonic-player` blob (full `queueItems` since thin-state #872). Each pref now has its own small localStorage key with legacy migration from the old blob.
+* Startup no longer overwrites saved prefs before Zustand rehydration finishes; persisted volume is pushed to the Rust engine on boot.
+
+
+
 ### In-page browse — virtual scroll and cover-art priority
 
 **By [@cucadmuh](https://github.com/cucadmuh), PR [#783](https://github.com/Psychotoxical/psysonic/pull/783)**