Neue Melo-UI Phase 1: 4 Tabs (Meine Musik/Suche/Favoriten/Download) + Sortierung

- Meine Musik als Startbildschirm ohne Topbar: Kopfzeile (Einstellungen,
  Suche, Musikerkennung), Schnellzugriffe, Shuffle + Sortieren, Liederliste
- Sortierung nach Zuletzt hinzugefuegt / Name (A-Z-#) / Wie oft abgespielt,
  auf- und absteigend, pro Liste gespeichert (SortStore)
- Favoriten als eigener Tab mit gleicher Shuffle-/Sortier-Leiste
- Download-Tab uebernimmt den Navidrome-Server-Browser
- DB-Schema 3: playCount, gezaehlt beim Titelstart
- Theme auf #0B0B10 / #c0392b
- Scan-Aktionen aus der entfallenen Topbar jetzt in den Einstellungen

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011snPXPafPC5i87o68H14W7

lib/main.dart

@@ -2,18 +2,17 @@ import 'package:audio_service/audio_service.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
+import 'downloads/downloads_screen.dart';
 import 'library/database.dart';
-import 'library/library_screen.dart';
+import 'library/favorites_screen.dart';
 import 'library/library_service.dart';
+import 'library/my_music_screen.dart';
 import 'library/playlist_service.dart';
 import 'library/search_screen.dart';
 import 'player/audio_handler.dart';
 import 'player/mini_player.dart';
-import 'player/now_playing_screen.dart';
-import 'playlists/playlists_screen.dart';
 import 'services/logger_service.dart';
 import 'services/offline_mode.dart';
-import 'settings/settings_screen.dart';
 import 'shared/theme.dart';
 
 late final MeloAudioHandler _handler;
@@ -75,35 +74,37 @@ class HomeShell extends StatefulWidget {
 class _HomeShellState extends State<HomeShell> {
   int _index = 0;
 
-  static const _tabs = <Widget>[
-    NowPlayingScreen(),
-    LibraryScreen(),
-    PlaylistsScreen(),
-    SearchScreen(),
-    SettingsScreen(),
-  ];
+  void _goTo(int index) => setState(() => _index = index);
 
   @override
   Widget build(BuildContext context) {
+    final tabs = <Widget>[
+      MyMusicScreen(
+        onSearchTap: () => _goTo(1),
+        onFavoritesTap: () => _goTo(2),
+      ),
+      const SearchScreen(),
+      const FavoritesScreen(),
+      const DownloadsScreen(),
+    ];
     return Scaffold(
       body: Column(
         children: [
-          Expanded(child: IndexedStack(index: _index, children: _tabs)),
-          if (_index != 0) const MiniPlayer(),
+          Expanded(child: IndexedStack(index: _index, children: tabs)),
+          const MiniPlayer(),
         ],
       ),
       bottomNavigationBar: BottomNavigationBar(
         currentIndex: _index,
-        onTap: (i) => setState(() => _index = i),
+        onTap: _goTo,
         items: const [
           BottomNavigationBarItem(
-              icon: Icon(Icons.play_circle_outline), label: 'Player'),
-          BottomNavigationBarItem(
-              icon: Icon(Icons.library_music), label: 'Bibliothek'),
-          BottomNavigationBarItem(
-              icon: Icon(Icons.playlist_play), label: 'Playlisten'),
+              icon: Icon(Icons.headphones), label: 'Meine Musik'),
           BottomNavigationBarItem(icon: Icon(Icons.search), label: 'Suche'),
-          BottomNavigationBarItem(icon: Icon(Icons.settings), label: 'Settings'),
+          BottomNavigationBarItem(
+              icon: Icon(Icons.favorite_border), label: 'Favoriten'),
+          BottomNavigationBarItem(
+              icon: Icon(Icons.download_outlined), label: 'Download'),
         ],
       ),
     );