🎉 Initial commit: AudiOhm - Alternative à Spotify avec streaming YouTube

Features:
- Frontend Flutter avec thème néon cyberpunk
- Backend FastAPI avec streaming YouTube
- Base de données PostgreSQL + Redis
- Authentification JWT complète
- Recherche multi-source (DB + YouTube)
- Playlists CRUD avec drag & drop
- Queue management
- Settings avec audio quality
- Interface adaptative (Desktop + Mobile)

Tech Stack:
- Frontend: Flutter 3.2+, Riverpod
- Backend: Python 3.11+, FastAPI
- Database: PostgreSQL 15+
- Cache: Redis 7+
- Streaming: yt-dlp + FFmpeg

🚀 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

frontend/lib/domain/entities/user.dart

@@ -0,0 +1,58 @@
+import 'package:equatable/equatable.dart';
+
+/// User entity
+class User extends Equatable {
+  final String id;
+  final String email;
+  final String username;
+  final String? displayName;
+  final String? avatarUrl;
+  final bool isPremium;
+  final DateTime createdAt;
+  final DateTime updatedAt;
+
+  const User({
+    required this.id,
+    required this.email,
+    required this.username,
+    this.displayName,
+    this.avatarUrl,
+    this.isPremium = false,
+    required this.createdAt,
+    required this.updatedAt,
+  });
+
+  User copyWith({
+    String? id,
+    String? email,
+    String? username,
+    String? displayName,
+    String? avatarUrl,
+    bool? isPremium,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+  }) {
+    return User(
+      id: id ?? this.id,
+      email: email ?? this.email,
+      username: username ?? this.username,
+      displayName: displayName ?? this.displayName,
+      avatarUrl: avatarUrl ?? this.avatarUrl,
+      isPremium: isPremium ?? this.isPremium,
+      createdAt: createdAt ?? this.createdAt,
+      updatedAt: updatedAt ?? this.updatedAt,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        id,
+        email,
+        username,
+        displayName,
+        avatarUrl,
+        isPremium,
+        createdAt,
+        updatedAt,
+      ];
+}