AI Implementation feature(859): Admin Area General Settings and Categories (#21)

backend/src/common/errors/error-codes.ts

@@ -17,6 +17,8 @@ export const ERROR_CODES = {
   INVALID_OLD_PASSWORD: 'INVALID_OLD_PASSWORD',
   PASSWORD_POLICY: 'PASSWORD_POLICY',
   PASSWORDS_DO_NOT_MATCH: 'PASSWORDS_DO_NOT_MATCH',
+  CATEGORY_HAS_CHALLENGES: 'CATEGORY_HAS_CHALLENGES',
+  SYSTEM_PROTECTED: 'SYSTEM_PROTECTED',
   INTERNAL: 'INTERNAL',
 } as const;