Initial commit

lib/shared/cover.dart

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+import 'dart:io';
+
+import 'package:flutter/material.dart';
+
+import 'theme.dart';
+
+/// Cover-Bild aus einer file-URI, mit Noten-Platzhalter als Fallback.
+class CoverImage extends StatelessWidget {
+  const CoverImage({super.key, required this.artUri, this.size, this.radius = 8});
+  final Uri? artUri;
+  final double? size;
+  final double radius;
+
+  @override
+  Widget build(BuildContext context) {
+    final placeholder = Container(
+      width: size,
+      height: size,
+      color: MeloTheme.surface,
+      child: LayoutBuilder(
+        builder: (_, c) {
+          final s = size ?? (c.hasBoundedWidth ? c.maxWidth : 48.0);
+          return Icon(Icons.music_note, size: s * 0.4, color: MeloTheme.red);
+        },
+      ),
+    );
+    Widget child = placeholder;
+    if (artUri != null && artUri!.scheme == 'file') {
+      child = Image.file(
+        File(artUri!.toFilePath()),
+        width: size,
+        height: size,
+        fit: BoxFit.cover,
+        errorBuilder: (_, _, _) => placeholder,
+      );
+    }
+    return ClipRRect(borderRadius: BorderRadius.circular(radius), child: child);
+  }
+}

lib/shared/theme.dart

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+import 'package:flutter/material.dart';
+
+/// Melo-Theme: Schwarz + Rot.
+class MeloTheme {
+  static const Color red = Color(0xFFE50914);
+  static const Color black = Color(0xFF0A0A0A);
+  static const Color surface = Color(0xFF161616);
+
+  static ThemeData get dark {
+    final scheme = ColorScheme.fromSeed(
+      seedColor: red,
+      brightness: Brightness.dark,
+    ).copyWith(
+      primary: red,
+      surface: black,
+    );
+    return ThemeData(
+      useMaterial3: true,
+      colorScheme: scheme,
+      scaffoldBackgroundColor: black,
+      cardColor: surface,
+      sliderTheme: const SliderThemeData(
+        activeTrackColor: red,
+        thumbColor: red,
+        trackHeight: 3,
+      ),
+      bottomNavigationBarTheme: const BottomNavigationBarThemeData(
+        backgroundColor: surface,
+        selectedItemColor: red,
+        unselectedItemColor: Colors.white54,
+        type: BottomNavigationBarType.fixed,
+      ),
+    );
+  }
+}