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/ArtistDetail.tsx

@@ -4,7 +4,7 @@ import { getArtist, getArtistInfo, getTopSongs, getSimilarSongs2, SubsonicArtist
 import AlbumCard from '../components/AlbumCard';
 import CachedImage from '../components/CachedImage';
 import { ArrowLeft, Users, ExternalLink, Star, Play, Shuffle, Radio } from 'lucide-react';
-import { open } from '@tauri-apps/plugin-shell';
+import { WebviewWindow } from '@tauri-apps/api/webviewWindow';
 import { usePlayerStore } from '../store/playerStore';
 import { useTranslation } from 'react-i18next';
 
@@ -77,7 +77,16 @@ export default function ArtistDetail() {
     });
   }, [id]);
 
-  const openLink = (url: string) => open(url);
+  const openLink = (url: string, title: string) => {
+    const label = `browser_${Date.now()}`;
+    new WebviewWindow(label, {
+      url,
+      title,
+      width: 1100,
+      height: 780,
+      center: true,
+    });
+  };
 
   const toggleStar = async () => {
     if (!artist) return;
@@ -183,12 +192,12 @@ export default function ArtistDetail() {
             {(info?.lastFmUrl || artist.name) && (
               <div className="artist-detail-links">
                 {info?.lastFmUrl && (
-                  <button className="artist-ext-link" onClick={() => openLink(info.lastFmUrl!)}>
+                  <button className="artist-ext-link" onClick={() => openLink(info.lastFmUrl!, `${artist.name} — Last.fm`)}>
                     <LastfmIcon size={14} />
                     Last.fm
                   </button>
                 )}
-                <button className="artist-ext-link" onClick={() => openLink(wikiUrl)}>
+                <button className="artist-ext-link" onClick={() => openLink(wikiUrl, `${artist.name} — Wikipedia`)}>
                   <ExternalLink size={14} />
                   Wikipedia
                 </button>