fix(sidebar): reorder sidebar nav items by id to stop drag drift (#1206)

* fix(sidebar): reorder nav items by id instead of positional index

The Settings sidebar customizer rendered library rows with one filter and
reordered them with another, so a hidden/gated item (luckyMix when AudioMuse
is unavailable) made the rendered list shorter than the reorder list and drag
indices landed one slot off — rows jumped back on drop. Replace the index-based
reorder with an id-based primitive shared by the customizer and the in-sidebar
long-press DnD, so a render filter can no longer desync the move. Unknown,
cross-section, conserved, or no-op drops are rejected.

* docs(changelog): note sidebar reorder fix (#1206)

CHANGELOG.md

@@ -384,6 +384,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Pressing Play, Shuffle or Add to queue on a playlist no longer reloads the whole page with a spinner — it just starts playback. Editing the playlist (adding or removing songs) still refreshes the list as before.
 
+### Sidebar items jumped back when reordered
+
+**By [@Psychotoxical](https://github.com/Psychotoxical), PR [#1206](https://github.com/Psychotoxical/psysonic/pull/1206)**, reported by [@tummydummy](https://github.com/tummydummy)
+
+* In Settings → Personalization → Sidebar, dragging an item to a new position could snap it back or land it one place off, depending on which items were hidden. Reordering now tracks each item directly, so it stays exactly where you release it — both in the customizer and when long-pressing items in the sidebar itself.
+
 ## [1.48.1] - 2026-06-15
 
 ## Fixed