poprawki i zmiany ux

backend/app/storage/auth_users.py

@@ -108,6 +108,23 @@ class SQLiteAuthUserRepository:
                 return None
         return self.get_by_username(username)
 
+    def update_role(self, username: str, role: str) -> AuthUser | None:
+        now = datetime.utcnow().isoformat()
+        with self.connect() as conn:
+            cursor = conn.execute(
+                "UPDATE auth_users SET role = ?, updated_at = ? WHERE username = ?",
+                (role, now, username),
+            )
+            if cursor.rowcount == 0:
+                return None
+        return self.get_by_username(username)
+
+    def count_admin_users(self) -> int:
+        with self.connect() as conn:
+            row = conn.execute(
+                "SELECT COUNT(*) AS count FROM auth_users WHERE role = 'admin' AND is_active = 1"
+            ).fetchone()
+        return int(row['count']) if row is not None else 0
 
     def list_users(self) -> list[AuthUser]:
         with self.connect() as conn: