feat: Convert Figma React UI to Svelte 5

- Add lucide-svelte for icons
- Create app.css with theme CSS variables (Dark, Light, OLED, Warm)
- Convert all React components to Svelte 5 using runes ($state, $derived, $effect, $props)
- Implement core components: Sidebar, NowPlayingBar, NavigationItem, UserCard,
  AlbumCard, HorizontalScrollRow, HeroSection, TrackRow, Toggle, Dropdown,
  Tooltip, VolumeSlider
- Implement view components: HomeView, SettingsView, AlbumDetailView
- Implement overlay components: QueuePanel, FullScreenNowPlaying, FocusMode, Toast
- Create main +page.svelte with routing, state management and keyboard shortcuts
- All components use Svelte 5 snippets for component children patterns

package.json

@@ -15,16 +15,17 @@
   "dependencies": {
     "@tauri-apps/api": "^2",
     "@tauri-apps/plugin-opener": "^2",
+    "lucide-svelte": "^0.562.0",
     "svelte-i18n": "^4.0.0"
   },
   "devDependencies": {
     "@sveltejs/adapter-static": "^3.0.6",
     "@sveltejs/kit": "^2.9.0",
     "@sveltejs/vite-plugin-svelte": "^5.0.0",
+    "@tauri-apps/cli": "^2",
     "svelte": "^5.0.0",
     "svelte-check": "^4.0.0",
     "typescript": "~5.6.2",
-    "vite": "^6.0.3",
-    "@tauri-apps/cli": "^2"
+    "vite": "^6.0.3"
   }
 }