Remove all offline download and caching functionality

- Deleted all offline-related component files:
  - EnhancedOfflineManager.tsx
  - OfflineIndicator.tsx
  - OfflineLibrarySync.tsx
  - OfflineManagement.tsx
  - OfflineNavidromeContext.tsx
  - OfflineNavidromeProvider.tsx
  - OfflineStatusIndicator.tsx
- Deleted all offline-related hooks:
  - use-offline-audio-player.ts
  - use-offline-downloads.ts
  - use-offline-library-sync.ts
  - use-offline-library.ts
- Updated components to remove offline functionality:
  - RootLayoutClient: Removed OfflineNavidromeProvider, using only NavidromeProvider
  - SongRecommendations: Removed offline data fetching logic
  - album-artwork: Removed OfflineIndicator usage
  - WhatsNewPopup: Updated changelog to reflect offline removal
- Updated pages:
  - album/[id]/page: Removed all OfflineIndicator components from album and song displays
  - page.tsx: Removed OfflineStatusIndicator and offline empty state message
  - settings/page: Removed EnhancedOfflineManager and OfflineManagement sections
- Simplified use-progressive-album-loading hook to only use online API
- Fixed resizable component imports for react-resizable-panels 4.5.1 API changes

app/settings/page.tsx

@@ -14,7 +14,6 @@ import { useStandaloneLastFm } from '@/hooks/use-standalone-lastfm';
 import { useSidebarShortcuts, SidebarShortcutType } from '@/hooks/use-sidebar-shortcuts';
 import { SidebarCustomization } from '@/app/components/SidebarCustomization';
 import { SettingsManagement } from '@/app/components/SettingsManagement';
-import EnhancedOfflineManager from '@/app/components/EnhancedOfflineManager';
 import { AutoTaggingSettings } from '@/app/components/AutoTaggingSettings';
 import { FaServer, FaUser, FaLock, FaCheck, FaTimes, FaLastfm, FaCog, FaTags } from 'react-icons/fa';
 import { Settings, ExternalLink, Tag } from 'lucide-react';
@@ -778,11 +777,6 @@ const SettingsPage = () => {
                   <SettingsManagement />
                 </div>
 
-                {/* Offline Library Management */}
-                <div className="break-inside-avoid mb-6">
-                  <EnhancedOfflineManager />
-                </div>
-
                 {/* Auto-Tagging Settings */}
                 <div className="break-inside-avoid mb-6">
                   <AutoTaggingSettings />