계정 정보 다이얼로그 추가 및 전체 목록 페치 개선

lib/features/masters/customer/presentation/controllers/customer_controller.dart

@@ -44,6 +44,17 @@ class CustomerController extends ChangeNotifier {
     _errorMessage = null;
     notifyListeners();
     try {
+      final previous = _result;
+      final int resolvedPage;
+      if (page < 1) {
+        resolvedPage = 1;
+      } else if (previous != null && previous.pageSize > 0) {
+        final calculated = (previous.total / previous.pageSize).ceil();
+        final maxPage = calculated < 1 ? 1 : calculated;
+        resolvedPage = page > maxPage ? maxPage : page;
+      } else {
+        resolvedPage = page;
+      }
       bool? isPartner;
       bool? isGeneral;
       switch (_typeFilter) {
@@ -68,7 +79,7 @@ class CustomerController extends ChangeNotifier {
       };
 
       final response = await _repository.list(
-        page: page,
+        page: resolvedPage,
         pageSize: _pageSize,
         query: _query.isEmpty ? null : _query,
         isPartner: isPartner,