fix(playlists): Smart Playlist editor theme, toggles, and exclude-all-genres (#970)

* fix(playlists): Smart Playlist editor theme, toggles, and exclude-all-genres

Replace native sort select with CustomSelect, fix mode-button layout shift,
color-code included vs excluded genres, collapse exclude-all to untagged rule,
and handle empty smart playlists without false "not found".

* docs: CHANGELOG and credits for Smart Playlist editor fix (PR #970)

* chore(credits): drop minor fix entries from PR #958 onward

src/config/settingsCredits.ts

@@ -151,10 +151,6 @@ const CONTRIBUTOR_ENTRIES = [
       'Performance Probe: on-demand (ui) cover throughput alongside backfill (lib) cpm (PR #947)',
       'Performance Probe: throughput (analysis tpm, cover cpm) measured over a trailing 5s window so the rate reacts promptly instead of coasting on minute-long inertia (PR #948)',
       'Cover backfill: follow the smart local/public endpoint switch so off-LAN clients stop fetching covers from the unreachable local address (PR #952)',
-      'Player: persist volume/repeat/queue visibility/Last.fm cache outside quota-bound queue blob (report: norp on Psysonic Discord) (PR #958)',
-      'Player transport: custom delay input capped to browser timer limit; preview/countdown aligned for fractional minutes (report: zunoz on Psysonic Discord) (PR #967)',
-      'Settings: in-page search indexes AudioMuse + shortcut rows; rejects junk fuzzy matches (report: zunoz on Psysonic Discord) (PR #968)',
-      'Floating player bar: center shrink-wrapped pill instead of full-width background strip (report: Asra on Psysonic Discord) (PR #969)',
     ],
   },
   {