Improve the frontend and repository layer

frontend/src/components/ui/AddModal/AddModal.tsx

@@ -257,6 +257,9 @@ export interface AddModalProps {
   // Validation
   validationErrors?: Record<string, string>;
   onValidationError?: (errors: Record<string, string>) => void;
+
+  // Field change callback for dynamic form behavior
+  onFieldChange?: (fieldName: string, value: any) => void;
 }
 
 /**
@@ -285,6 +288,7 @@ export const AddModal: React.FC<AddModalProps> = ({
   initialData = EMPTY_INITIAL_DATA,
   validationErrors = EMPTY_VALIDATION_ERRORS,
   onValidationError,
+  onFieldChange,
 }) => {
   const [formData, setFormData] = useState<Record<string, any>>({});
   const [fieldErrors, setFieldErrors] = useState<Record<string, string>>({});
@@ -356,6 +360,9 @@ export const AddModal: React.FC<AddModalProps> = ({
         onValidationError?.(newErrors);
       }
     }
+
+    // Notify parent component of field change
+    onFieldChange?.(fieldName, value);
   };
 
   const findFieldByName = (fieldName: string): AddModalField | undefined => {