uncommited changes

backend/database.py

@@ -0,0 +1,15 @@
+# backend/database.py
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, scoped_session
+
+SQLALCHEMY_DATABASE_URL = "sqlite:///./app.db"  # или PostgreSQL URL
+
+engine = create_engine(SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False})
+SessionLocal = scoped_session(sessionmaker(autocommit=False, autoflush=False, bind=engine))
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()