계정 정보 다이얼로그 추가 및 전체 목록 페치 개선

lib/features/masters/customer/presentation/pages/customer_page.dart

@@ -125,9 +125,10 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
     final error = _controller.errorMessage;
     if (error != null && error != _lastError && mounted) {
       _lastError = error;
-      ScaffoldMessenger.of(
-        context,
-      ).showSnackBar(SnackBar(content: Text(error)));
+      final messenger = ScaffoldMessenger.maybeOf(context);
+      if (messenger != null) {
+        messenger.showSnackBar(SnackBar(content: Text(error)));
+      }
       _controller.clearError();
     }
   }
@@ -174,7 +175,7 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
         final currentPage = result?.page ?? 1;
         final totalPages = result == null || result.pageSize == 0
             ? 1
-            : (result.total / result.pageSize).ceil().clamp(1, 9999);
+            : (result.total / result.pageSize).ceil().clamp(1, 9999) as int;
         final hasNext = result == null
             ? false
             : (result.page * result.pageSize) < result.total;
@@ -301,6 +302,14 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
                 ),
                 Row(
                   children: [
+                    ShadButton.outline(
+                      size: ShadButtonSize.sm,
+                      onPressed: _controller.isLoading || currentPage <= 1
+                          ? null
+                          : () => _goToPage(1),
+                      child: const Text('처음'),
+                    ),
+                    const SizedBox(width: 8),
                     ShadButton.outline(
                       size: ShadButtonSize.sm,
                       onPressed: _controller.isLoading || currentPage <= 1
@@ -316,6 +325,15 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
                           : () => _goToPage(currentPage + 1),
                       child: const Text('다음'),
                     ),
+                    const SizedBox(width: 8),
+                    ShadButton.outline(
+                      size: ShadButtonSize.sm,
+                      onPressed:
+                          _controller.isLoading || currentPage >= totalPages
+                              ? null
+                              : () => _goToPage(totalPages),
+                      child: const Text('마지막'),
+                    ),
                   ],
                 ),
               ],
@@ -357,8 +375,18 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
   }
 
   void _goToPage(int page) {
+    final result = _controller.result;
+    final int totalPages;
+    if (result == null || result.pageSize == 0) {
+      totalPages = 1;
+    } else {
+      final calculated = (result.total / result.pageSize).ceil();
+      totalPages = calculated < 1 ? 1 : calculated;
+    }
     if (page < 1) {
       page = 1;
+    } else if (page > totalPages) {
+      page = totalPages;
     }
     _updateRoute(page: page);
   }
@@ -647,7 +675,10 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
                         isActive: isActiveNotifier.value,
                         note: note.isEmpty ? null : note,
                       );
-                      final navigator = Navigator.of(context);
+                      final navigator = Navigator.of(
+                        context,
+                        rootNavigator: true,
+                      );
                       final response = isEdit
                           ? await _controller.update(customerId!, input)
                           : await _controller.create(input);
@@ -672,7 +703,8 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
             return ShadButton.ghost(
               onPressed: isSaving
                   ? null
-                  : () => Navigator.of(context).pop(false),
+                  : () =>
+                      Navigator.of(context, rootNavigator: true).pop(false),
               child: const Text('취소'),
             );
           },
@@ -984,11 +1016,13 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
         description: '"${customer.customerName}" 고객사를 삭제하시겠습니까?',
         actions: [
           ShadButton.ghost(
-            onPressed: () => Navigator.of(context).pop(false),
+            onPressed: () =>
+                Navigator.of(context, rootNavigator: true).pop(false),
             child: const Text('취소'),
           ),
           ShadButton(
-            onPressed: () => Navigator.of(context).pop(true),
+            onPressed: () =>
+                Navigator.of(context, rootNavigator: true).pop(true),
             child: const Text('삭제'),
           ),
         ],
@@ -1012,10 +1046,14 @@ class _CustomerEnabledPageState extends State<_CustomerEnabledPage> {
   }
 
   void _showSnack(String message) {
-    if (!mounted) return;
-    ScaffoldMessenger.of(
-      context,
-    ).showSnackBar(SnackBar(content: Text(message)));
+    if (!mounted) {
+      return;
+    }
+    final messenger = ScaffoldMessenger.maybeOf(context);
+    if (messenger == null) {
+      return;
+    }
+    messenger.showSnackBar(SnackBar(content: Text(message)));
   }
 
   String _formatDateTime(DateTime? value) {