feat: v1.13.0 — SVG Logo, Marquee, Player UX, Global Shortcuts fix

### Added
- SVG logo with theme-adaptive gradient in sidebar (full wordmark + P-icon for collapsed state)
- Player bar: song title/artist marquee scroll on overflow
- Player bar: live volume percentage tooltip on slider hover

### Changed
- Sidebar collapse button moved to right-edge hover tab
- Player bar: fixed 320px track info width, increased waveform margins
- Settings: Server tab opens by default
- Crossfade: experimental badge removed (stable)
- Help page: Lyrics/Keybindings/Font entries added, theme count corrected

### Fixed
- Global shortcuts double-fire (Rust-side ShortcutMap idempotency fix)
- W98 theme: comprehensive contrast fixes for navy hover backgrounds
- Help page: removed orphaned translation key under Playback

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/Help.tsx

@@ -43,9 +43,9 @@ export default function Help() {
         { q: t('help.q7'), a: t('help.a7') },
         { q: t('help.q8'), a: t('help.a8') },
         { q: t('help.q22'), a: t('help.a22') },
-        { q: t('help.q23'), a: t('help.a23') },
         { q: t('help.q24'), a: t('help.a24') },
         { q: t('help.q29'), a: t('help.a29') },
+        { q: t('help.q30'), a: t('help.a30') },
       ],
     },
     {
@@ -66,6 +66,8 @@ export default function Help() {
         { q: t('help.q13'), a: t('help.a13') },
         { q: t('help.q14'), a: t('help.a14') },
         { q: t('help.q15'), a: t('help.a15') },
+        { q: t('help.q31'), a: t('help.a31') },
+        { q: t('help.q32'), a: t('help.a32') },
       ],
     },
     {