feat(pagination): 공통 컨트롤 도입과 사용자 관리 가이드 추가

- 테이블 푸터에서 SuperportPaginationControls를 사용하도록 각 관리 페이지 페이지네이션 로직을 정리

- SuperportPaginationControls 위젯을 추가하고 SuperportTable 푸터를 개선해 페이지 사이즈 선택과 이동 버튼을 분리

- 사용자 등록·계정 관리 요구사항을 문서화한 doc/user_setting.md를 작성하고 AGENTS.md 코멘트 규칙을 업데이트

- flutter analyze를 수행해 빌드 경고가 없음을 확인

lib/features/masters/menu/presentation/pages/menu_page.dart

@@ -6,6 +6,7 @@ import 'package:superport_v2/core/constants/app_sections.dart';
 import 'package:superport_v2/widgets/app_layout.dart';
 import 'package:superport_v2/widgets/components/filter_bar.dart';
 import 'package:superport_v2/widgets/components/superport_dialog.dart';
+import 'package:superport_v2/widgets/components/superport_pagination_controls.dart';
 
 import '../../../../../core/config/environment.dart';
 import '../../../../../widgets/spec_page.dart';
@@ -152,9 +153,6 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
         final totalPages = result == null || result.pageSize == 0
             ? 1
             : (result.total / result.pageSize).ceil().clamp(1, 9999);
-        final hasNext = result == null
-            ? false
-            : (result.page * result.pageSize) < result.total;
 
         final showReset =
             _searchController.text.isNotEmpty ||
@@ -308,41 +306,11 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
                   '페이지 $currentPage / $totalPages',
                   style: theme.textTheme.small,
                 ),
-                Row(
-                  children: [
-                    ShadButton.outline(
-                      size: ShadButtonSize.sm,
-                      onPressed: _controller.isLoading || currentPage <= 1
-                          ? null
-                          : () => _controller.fetch(page: 1),
-                      child: const Text('처음'),
-                    ),
-                    const SizedBox(width: 8),
-                    ShadButton.outline(
-                      size: ShadButtonSize.sm,
-                      onPressed: _controller.isLoading || currentPage <= 1
-                          ? null
-                          : () => _controller.fetch(page: currentPage - 1),
-                      child: const Text('이전'),
-                    ),
-                    const SizedBox(width: 8),
-                    ShadButton.outline(
-                      size: ShadButtonSize.sm,
-                      onPressed: _controller.isLoading || !hasNext
-                          ? null
-                          : () => _controller.fetch(page: currentPage + 1),
-                      child: const Text('다음'),
-                    ),
-                    const SizedBox(width: 8),
-                    ShadButton.outline(
-                      size: ShadButtonSize.sm,
-                      onPressed:
-                          _controller.isLoading || currentPage >= totalPages
-                              ? null
-                              : () => _controller.fetch(page: totalPages),
-                      child: const Text('마지막'),
-                    ),
-                  ],
+                SuperportPaginationControls(
+                  currentPage: currentPage,
+                  totalPages: totalPages,
+                  isBusy: _controller.isLoading,
+                  onPageSelected: (page) => _controller.fetch(page: page),
                 ),
               ],
             ),
@@ -436,9 +404,9 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
               onPressed: isSaving
                   ? null
                   : () => Navigator.of(
-                        dialogContext,
-                        rootNavigator: true,
-                      ).pop(false),
+                      dialogContext,
+                      rootNavigator: true,
+                    ).pop(false),
               child: const Text('취소'),
             );
           },
@@ -730,10 +698,8 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
         secondaryAction: Builder(
           builder: (dialogContext) {
             return ShadButton.ghost(
-              onPressed: () => Navigator.of(
-                    dialogContext,
-                    rootNavigator: true,
-                  ).pop(false),
+              onPressed: () =>
+                  Navigator.of(dialogContext, rootNavigator: true).pop(false),
               child: const Text('취소'),
             );
           },
@@ -741,10 +707,8 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
         primaryAction: Builder(
           builder: (dialogContext) {
             return ShadButton.destructive(
-              onPressed: () => Navigator.of(
-                    dialogContext,
-                    rootNavigator: true,
-                  ).pop(true),
+              onPressed: () =>
+                  Navigator.of(dialogContext, rootNavigator: true).pop(true),
               child: const Text('삭제'),
             );
           },