refactor: rename canto-backend → backend, canto-frontend → frontend

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/core/init_admin.py

@@ -0,0 +1,38 @@
+import logging
+from core.database import SessionLocal
+from core.security import get_password_hash
+from db.crud import count_users, create_user_by_admin
+
+logger = logging.getLogger(__name__)
+
+def init_superuser():
+    db = SessionLocal()
+    try:
+        user_count = count_users(db)
+
+        if user_count > 0:
+            logger.info(f"Database already has {user_count} user(s), skipping admin initialization")
+            return
+
+        logger.info("No users found in database, initializing default superuser")
+
+        hashed_password = get_password_hash("admin123456")
+        admin_user = create_user_by_admin(
+            db,
+            username="admin",
+            email="admin@example.com",
+            hashed_password=hashed_password,
+            is_superuser=True
+        )
+
+        logger.info(f"Default superuser created successfully: {admin_user.username}")
+        logger.warning("SECURITY WARNING: Default admin credentials are in use!")
+        logger.warning("  Username: admin")
+        logger.warning("  Password: admin123456")
+        logger.warning("  Please change the password immediately after first login!")
+
+    except Exception as e:
+        logger.error(f"Failed to initialize superuser: {e}")
+        raise
+    finally:
+        db.close()