Replace submodules with full folder contents

Machine-Backend/app/__init__.py

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+import os
+from flask import Flask, send_from_directory
+from flask_cors import CORS
+from flask_sqlalchemy import SQLAlchemy
+from dotenv import load_dotenv
+
+load_dotenv()
+db = SQLAlchemy()
+
+def create_app():
+    app = Flask(__name__, instance_relative_config=True)
+    
+    # CORS Configuration
+    CORS(app, resources={
+        r"/*": {
+            "origins": ["http://localhost:4200", "http://localhost:4300"],
+            "methods": ["GET", "POST", "PUT", "DELETE", "OPTIONS"],
+            "allow_headers": ["Content-Type", "Authorization"],
+            "supports_credentials": True
+        }
+    })
+
+    # Ensure directories exist
+    instance_path = os.path.abspath(os.path.join(os.path.dirname(__file__), 'instance'))
+    uploads_path = os.path.abspath(os.path.join(os.path.dirname(__file__), 'Uploads'))
+    
+    for path in [instance_path, uploads_path]:
+        if not os.path.exists(path):
+            os.makedirs(path)
+    
+    app.config['UPLOAD_FOLDER'] = uploads_path
+
+    # Database configuration
+    flask_env = os.getenv('FLASK_ENV', 'development').lower()
+    
+    if flask_env == 'production':
+        mysql_host = os.getenv('MYSQL_HOST')
+        mysql_user = os.getenv('MYSQL_USER')
+        mysql_password = os.getenv('MYSQL_PASSWORD')
+        mysql_db = os.getenv('MYSQL_DATABASE')
+        
+        if not all([mysql_host, mysql_user, mysql_password, mysql_db]):
+            raise ValueError("Missing required MySQL environment variables")
+        
+        app.config['SQLALCHEMY_DATABASE_URI'] = (
+            f'mysql+pymysql://{mysql_user}:{mysql_password}@{mysql_host}:3306/{mysql_db}'
+        )
+    else:
+        sqlite_db_path = os.getenv('SQLITE_DB_PATH', 'machines.db')
+        db_path = os.path.join(instance_path, sqlite_db_path)
+        app.config['SQLALCHEMY_DATABASE_URI'] = f'sqlite:///{db_path}'
+
+    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+    app.config['SQLALCHEMY_ECHO'] = os.getenv('SQLALCHEMY_ECHO', 'False').lower() == 'true'
+
+    # Initialize extensions
+    db.init_app(app)
+
+    # Import models
+    from app.models.models import Machine, User, Product, VendingSlot, Transaction
+
+    # Create tables
+    with app.app_context():
+        db.create_all()
+        print(f"✓ Database initialized ({flask_env})")
+        
+        # FIXED: Serial service connection BEFORE return
+        from app.services.services import serial_service
+        try:
+            connected = serial_service.connect_to_machine('/dev/ttyUSB0', 9600)
+            if connected:
+                print("✓ Vending machine connected successfully")
+            else:
+                print("✗ Failed to connect to vending machine")
+        except Exception as e:
+            print(f"⚠ Serial connection error: {e}")
+
+    # Register blueprints
+    from app.routes.routes import bp
+    app.register_blueprint(bp, url_prefix='/')
+
+    @app.route('/uploads/<filename>')
+    def uploaded_file(filename):
+        return send_from_directory(app.config['UPLOAD_FOLDER'], filename)
+
+    return app