Label edit functionality added

backend/app/api/dependencies.py

@@ -38,6 +38,22 @@ def get_current_user(
     return dict(user)
 
 
+def get_optional_current_user(
+    credentials: HTTPAuthorizationCredentials | None = Depends(bearer_scheme),
+) -> dict | None:
+    if credentials is None or credentials.scheme.lower() != 'bearer':
+        return None
+    token_data = validate_token(credentials.credentials)
+    if token_data is None:
+        return None
+    with get_connection() as conn:
+        user = conn.execute(
+            'SELECT * FROM users WHERE id = ?',
+            (token_data['user_id'],),
+        ).fetchone()
+    return dict(user) if user else None
+
+
 def require_admin(user: dict = Depends(get_current_user)):
     if not user['is_admin']:
         raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail='Administrator access required')