Initial commit: AudiOhm - Alternative Spotify avec streaming YouTube

Backend:
- FastAPI avec PostgreSQL et Redis
- Authentification JWT complète
- API REST pour musique, playlists, recherche
- Streaming audio via yt-dlp
- SQLAlchemy 2.0 async

Frontend:
- Flutter avec thème néon cyberpunk
- State management Riverpod
- Layout adaptatif desktop/mobile
- Lecteur audio avec mini-player

Infrastructure:
- Docker Compose (PostgreSQL + Redis)
- Scripts d'installation automatisés
- Scripts de build pour exécutables

Fichiers ajoutés:
- BUILD_CLIENT_*.bat/sh: Scripts de compilation
- BUILD_CLIENT_README.md: Documentation compilation
- CHECK_FLUTTER.sh: Vérificateur d'environnement
- requirements.txt mis à jour pour Python 3.13
- Modèles SQLAlchemy corrigés (metadata -> extra_metadata)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

BUILD_CLIENT_LINUX.sh

@@ -0,0 +1,95 @@
+#!/bin/bash
+# ============================================================================
+# Spotify Le 2 - Build Linux Client
+# ============================================================================
+# This script compiles the Flutter app into a Linux executable
+#
+# Prerequisites:
+# 1. Flutter SDK installed
+# 2. clang, cmake, ninja-build, gtk3-devel
+# ============================================================================
+
+echo "========================================"
+echo "  SPOTIFY LE 2 - BUILD LINUX CLIENT"
+echo "========================================"
+echo ""
+
+# Check if Flutter is installed
+if ! command -v flutter &> /dev/null; then
+    echo "[ERROR] Flutter is not installed!"
+    echo "Please install Flutter from: https://docs.flutter.dev/get-started/install/linux"
+    exit 1
+fi
+
+echo "[1/6] Checking Flutter installation..."
+flutter --version
+if [ $? -ne 0 ]; then
+    echo "[ERROR] Flutter check failed!"
+    exit 1
+fi
+echo "[OK] Flutter is ready!"
+echo ""
+
+echo "[2/6] Checking Flutter doctor..."
+flutter doctor -v
+echo ""
+
+echo "[3/6] Navigate to frontend directory..."
+cd frontend || exit 1
+echo ""
+
+echo "[4/6] Installing dependencies..."
+flutter pub get
+if [ $? -ne 0 ]; then
+    echo "[ERROR] Failed to install dependencies!"
+    exit 1
+fi
+echo "[OK] Dependencies installed!"
+echo ""
+
+echo "[5/6] Building Linux executable..."
+echo "This may take several minutes..."
+flutter build linux --release
+if [ $? -ne 0 ]; then
+    echo "[ERROR] Build failed!"
+    exit 1
+fi
+echo ""
+
+echo "[6/6] Creating distribution package..."
+BUILD_DIR="build/linux/x64/release/bundle"
+DIST_DIR="dist/linux"
+VERSION="0.1.0"
+
+# Create distribution directory
+rm -rf "$DIST_DIR"
+mkdir -p "$DIST_DIR"
+
+# Copy executable and assets
+cp -r "$BUILD_DIR"/* "$DIST_DIR/"
+
+# Create README
+cat > "$DIST_DIR/README.txt" << EOF
+Spotify Le 2 - Linux Client
+Version: $VERSION
+
+To run the application:
+  ./spotify_le_2
+
+Make sure the backend server is running on http://localhost:8000
+EOF
+
+chmod +x "$DIST_DIR/spotify_le_2"
+echo "[OK] Distribution package created!"
+echo ""
+
+echo "========================================"
+echo "  BUILD COMPLETED SUCCESSFULLY!"
+echo "========================================"
+echo ""
+echo "Executable location: $DIST_DIR/spotify_le_2"
+echo ""
+echo "To run the application:"
+echo "  1. Make sure the backend is running"
+echo "  2. Execute: $DIST_DIR/spotify_le_2"
+echo ""