feat: Waveform seekbar, MilkDrop visualizer, EQ bars, in-app browser, and UX improvements (v1.3.0)

- PlayerBar redesigned: canvas waveform seekbar (500 bars, blue→mauve gradient + glow) replaces thin slider; new flex layout; queue toggle moved to content header (consistent with sidebar pattern)
- MilkDrop visualizer in Ambient Stage via Butterchurn; hidden audio analysis, preset shuffle, smooth blend transitions
- Tracklist: animated EQ bars for playing track, play icon when paused, align-items: center fix
- Artist pages: Last.fm + Wikipedia open in native Tauri WebviewWindow (in-app browser)
- Hero/Discover deduplication: single fetch of 20 random albums split between sections
- Update checker: runs every 10 minutes during runtime; version shown without v-prefix
- Settings version: now read from package.json instead of hardcoded
- Help page: new Random Mix section, updated Playback + Library sections, improved accordion styling
- Bump version to 1.3.0

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

src/pages/Settings.tsx

@@ -1,4 +1,5 @@
 import React, { useState } from 'react';
+import { version as appVersion } from '../../package.json';
 import { useNavigate } from 'react-router-dom';
 import {
   Wifi, WifiOff, Globe, Music2, Sliders, LogOut, CheckCircle2, FolderOpen, Palette, Server, Plus, Trash2, Eye, EyeOff, Info, ExternalLink, Shuffle
@@ -465,7 +466,7 @@ export default function Settings() {
                 Psysonic
               </div>
               <div style={{ fontSize: 12, color: 'var(--text-muted)', marginTop: 2 }}>
-                {t('settings.aboutVersion')} 1.0.12
+                {t('settings.aboutVersion')} {appVersion}
               </div>
             </div>
           </div>