fix(inventory): 상세 편집 플로우 안정화

- inbound/outbound/rental controller에 fetchTransactionDetail을 추가해 상세 동기화를 지원

- 각 페이지 초기화 시 결재 초안 로딩 권한을 PermissionScope에서 확인하도록 수정

- 상세 패널의 수정 버튼이 모달과 연동되도록 흐름을 정리하고 생성/수정 후 상세 데이터를 재조회

- 기존 결재 메모 필드는 등록 이후 수정 불가하도록 UI와 입력 상태를 비활성화

- 신규 상세-수정 위젯 테스트와 리포지토리 스텁 fetchDetail 구현을 추가

- flutter analyze, flutter test를 실행해 회귀를 점검

lib/features/inventory/inbound/presentation/controllers/inbound_controller.dart

@@ -253,6 +253,24 @@ class InboundController extends ChangeNotifier {
     await fetchTransactions(filter: target);
   }
 
+  /// 단일 입고 트랜잭션 상세 정보를 조회한다.
+  Future<InboundRecord?> fetchTransactionDetail(
+    int id, {
+    List<String> include = const ['lines', 'customers', 'approval'],
+  }) async {
+    try {
+      final transaction = await _transactionRepository.fetchDetail(
+        id,
+        include: include,
+      );
+      return InboundRecord.fromTransaction(transaction);
+    } catch (error, stackTrace) {
+      debugPrint('[InboundController] 상세 조회 실패(id=$id): $error');
+      debugPrintStack(stackTrace: stackTrace);
+      return null;
+    }
+  }
+
   void _persistApprovalDraft(StockTransactionApprovalInput approval) {
     final useCase = _saveDraftUseCase;
     if (useCase == null) {

lib/features/inventory/inbound/presentation/pages/inbound_page.dart

@@ -158,7 +158,7 @@ class _InboundPageState extends State<InboundPage> {
       await controller.loadStatusOptions();
       await controller.loadApprovalStatuses();
       final requester = _resolveCurrentWriter();
-      if (requester != null) {
+      if (requester != null && _canRestoreApprovalDrafts) {
         await controller.loadApprovalDraftFromServer(requesterId: requester.id);
       }
       final hasType = await controller.resolveTransactionType();
@@ -171,6 +171,17 @@ class _InboundPageState extends State<InboundPage> {
     });
   }
 
+  bool get _canRestoreApprovalDrafts {
+    final getIt = GetIt.I;
+    if (!getIt.isRegistered<PermissionManager>()) {
+      return false;
+    }
+    return getIt<PermissionManager>().can(
+      PermissionResources.approvals,
+      PermissionAction.view,
+    );
+  }
+
   void _handleControllerChanged() {
     if (!mounted) {
       return;
@@ -909,7 +920,7 @@ class _InboundPageState extends State<InboundPage> {
   }
 
   List<Widget> _buildDetailActions(InboundRecord record) {
-    final isProcessing = _isProcessing(record.id) || _isLoading;
+    final isProcessing = _isProcessing(record.id);
     final actions = <Widget>[];
 
     if (_canSubmit(record)) {
@@ -1729,6 +1740,21 @@ class _InboundPageState extends State<InboundPage> {
         SuperportToast.error(context, '입고 컨트롤러를 찾을 수 없습니다.');
         return;
       }
+      Future<InboundRecord?> resolveUpdatedRecord(int? id) async {
+        if (id == null) {
+          return null;
+        }
+        final detail = await controller.fetchTransactionDetail(id);
+        if (detail != null) {
+          return detail;
+        }
+        for (final record in controller.records) {
+          if (record.id == id) {
+            return record;
+          }
+        }
+        return null;
+      }
 
       final transactionTypeLookup =
           _transactionTypeLookup ?? controller.transactionType;
@@ -1814,7 +1840,6 @@ class _InboundPageState extends State<InboundPage> {
             ),
             refreshAfter: false,
           );
-          result = updated;
           final currentLines =
               initialRecord.raw?.lines ?? const <StockTransactionLine>[];
           final currentCustomers = initialRecord.customers;
@@ -1850,6 +1875,8 @@ class _InboundPageState extends State<InboundPage> {
             );
           }
           await controller.refresh();
+          final refreshed = await resolveUpdatedRecord(transactionId);
+          result = refreshed ?? updated;
           updateSaving(false);
           if (!mounted) {
             return;
@@ -1932,7 +1959,8 @@ class _InboundPageState extends State<InboundPage> {
           return true;
         }());
         final created = await controller.createTransaction(createInput);
-        result = created;
+        final refreshed = await resolveUpdatedRecord(created.id);
+        result = refreshed ?? created;
         updateSaving(false);
         if (!mounted) {
           return;
@@ -2157,9 +2185,14 @@ class _InboundPageState extends State<InboundPage> {
                       width: 500,
                       child: SuperportFormField(
                         label: '결재 메모',
+                        caption: initial != null
+                            ? '등록된 결재 메모는 수정할 수 없습니다.'
+                            : null,
                         child: ShadInput(
                           controller: approvalNoteController,
                           maxLines: 2,
+                          readOnly: initial != null,
+                          enabled: initial == null,
                         ),
                       ),
                     ),

lib/features/inventory/outbound/presentation/controllers/outbound_controller.dart

@@ -233,6 +233,24 @@ class OutboundController extends ChangeNotifier {
     await fetchTransactions(filter: target);
   }
 
+  /// 단일 출고 트랜잭션 상세를 조회한다.
+  Future<OutboundRecord?> fetchTransactionDetail(
+    int id, {
+    List<String> include = const ['lines', 'customers', 'approval'],
+  }) async {
+    try {
+      final transaction = await _transactionRepository.fetchDetail(
+        id,
+        include: include,
+      );
+      return OutboundRecord.fromTransaction(transaction);
+    } catch (error, stackTrace) {
+      debugPrint('[OutboundController] 상세 조회 실패(id=$id): $error');
+      debugPrintStack(stackTrace: stackTrace);
+      return null;
+    }
+  }
+
   void _persistApprovalDraft(StockTransactionApprovalInput approval) {
     final useCase = _saveDraftUseCase;
     if (useCase == null) {

lib/features/inventory/outbound/presentation/pages/outbound_page.dart

@@ -165,7 +165,7 @@ class _OutboundPageState extends State<OutboundPage> {
     Future.microtask(() async {
       await controller.loadStatusOptions();
       final requester = _resolveCurrentWriter();
-      if (requester != null) {
+      if (requester != null && _canRestoreApprovalDrafts) {
         await controller.loadApprovalDraftFromServer(requesterId: requester.id);
       }
       final hasType = await controller.resolveTransactionType();
@@ -178,6 +178,17 @@ class _OutboundPageState extends State<OutboundPage> {
     });
   }
 
+  bool get _canRestoreApprovalDrafts {
+    final getIt = GetIt.I;
+    if (!getIt.isRegistered<PermissionManager>()) {
+      return false;
+    }
+    return getIt<PermissionManager>().can(
+      PermissionResources.approvals,
+      PermissionAction.view,
+    );
+  }
+
   Future<void> _loadCustomerOptions() async {
     final getIt = GetIt.I;
     if (!getIt.isRegistered<CustomerRepository>()) {
@@ -982,7 +993,7 @@ class _OutboundPageState extends State<OutboundPage> {
   }
 
   List<Widget> _buildDetailActions(OutboundRecord record) {
-    final isProcessing = _isProcessing(record.id) || _isLoading;
+    final isProcessing = _isProcessing(record.id);
     final actions = <Widget>[];
 
     if (_canSubmit(record)) {
@@ -1028,12 +1039,7 @@ class _OutboundPageState extends State<OutboundPage> {
     actions.add(
       ShadButton.outline(
         leading: const Icon(lucide.LucideIcons.pencil, size: 16),
-        onPressed: isProcessing
+        onPressed: isProcessing ? null : () => _openEditFromDetail(record),
-            ? null
-            : () {
-                Navigator.of(context).maybePop();
-                _handleEdit(record);
-              },
         child: const Text('수정'),
       ),
     );
@@ -1041,6 +1047,17 @@ class _OutboundPageState extends State<OutboundPage> {
     return actions;
   }
 
+  void _openEditFromDetail(OutboundRecord record) {
+    final navigator = Navigator.of(context, rootNavigator: true);
+    navigator.pop();
+    WidgetsBinding.instance.addPostFrameCallback((_) async {
+      if (!mounted) {
+        return;
+      }
+      await _handleEdit(record, reopenOnCancel: true);
+    });
+  }
+
   Future<void> _handleCreate() async {
     final record = await _showOutboundFormDialog();
     if (record != null) {
@@ -1048,10 +1065,15 @@ class _OutboundPageState extends State<OutboundPage> {
     }
   }
 
-  Future<void> _handleEdit(OutboundRecord record) async {
+  Future<void> _handleEdit(
+    OutboundRecord record, {
+    bool reopenOnCancel = false,
+  }) async {
     final updated = await _showOutboundFormDialog(initial: record);
     if (updated != null) {
       _selectRecord(updated, openDetail: true);
+    } else if (reopenOnCancel) {
+      _selectRecord(record, openDetail: true);
     }
   }
 
@@ -1821,6 +1843,21 @@ class _OutboundPageState extends State<OutboundPage> {
         SuperportToast.error(context, '출고 컨트롤러를 찾을 수 없습니다.');
         return;
       }
+      Future<OutboundRecord?> resolveUpdatedRecord(int? id) async {
+        if (id == null) {
+          return null;
+        }
+        final detail = await controller.fetchTransactionDetail(id);
+        if (detail != null) {
+          return detail;
+        }
+        for (final record in controller.records) {
+          if (record.id == id) {
+            return record;
+          }
+        }
+        return null;
+      }
 
       final transactionTypeLookup =
           _transactionTypeLookup ?? controller.transactionType;
@@ -1912,7 +1949,6 @@ class _OutboundPageState extends State<OutboundPage> {
             ),
             refreshAfter: false,
           );
-          result = updated;
           final StockTransaction? currentTransaction = initialRecord.raw;
           final currentLines =
               currentTransaction?.lines ?? const <StockTransactionLine>[];
@@ -1937,6 +1973,8 @@ class _OutboundPageState extends State<OutboundPage> {
             );
           }
           await controller.refresh();
+          final refreshed = await resolveUpdatedRecord(transactionId);
+          result = refreshed ?? updated;
           updateSaving(false);
           if (!mounted) {
             return;
@@ -2006,7 +2044,8 @@ class _OutboundPageState extends State<OutboundPage> {
             approval: approvalInput,
           ),
         );
-        result = created;
+        final refreshed = await resolveUpdatedRecord(created.id);
+        result = refreshed ?? created;
         updateSaving(false);
         if (!mounted) {
           return;
@@ -2227,9 +2266,14 @@ class _OutboundPageState extends State<OutboundPage> {
                       width: 500,
                       child: SuperportFormField(
                         label: '결재 메모',
+                        caption: initial != null
+                            ? '등록된 결재 메모는 수정할 수 없습니다.'
+                            : null,
                         child: ShadInput(
                           controller: approvalNoteController,
                           maxLines: 2,
+                          readOnly: initial != null,
+                          enabled: initial == null,
                         ),
                       ),
                     ),

lib/features/inventory/rental/presentation/controllers/rental_controller.dart

@@ -262,6 +262,24 @@ class RentalController extends ChangeNotifier {
     );
   }
 
+  /// 단일 대여/반납 트랜잭션 상세를 조회한다.
+  Future<RentalRecord?> fetchTransactionDetail(
+    int id, {
+    List<String> include = const ['lines', 'customers', 'approval'],
+  }) async {
+    try {
+      final transaction = await _transactionRepository.fetchDetail(
+        id,
+        include: include,
+      );
+      return RentalRecord.fromTransaction(transaction);
+    } catch (error, stackTrace) {
+      debugPrint('[RentalController] 상세 조회 실패(id=$id): $error');
+      debugPrintStack(stackTrace: stackTrace);
+      return null;
+    }
+  }
+
   void _persistApprovalDraft(StockTransactionApprovalInput approval) {
     final useCase = _saveDraftUseCase;
     if (useCase == null) {

lib/features/inventory/rental/presentation/pages/rental_page.dart

@@ -162,7 +162,7 @@ class _RentalPageState extends State<RentalPage> {
     Future.microtask(() async {
       await controller.loadStatusOptions();
       final requester = _resolveCurrentWriter();
-      if (requester != null) {
+      if (requester != null && _canRestoreApprovalDrafts) {
         await controller.loadApprovalDraftFromServer(requesterId: requester.id);
       }
       final hasTypes = await controller.resolveTransactionTypes();
@@ -175,6 +175,17 @@ class _RentalPageState extends State<RentalPage> {
     });
   }
 
+  bool get _canRestoreApprovalDrafts {
+    final getIt = GetIt.I;
+    if (!getIt.isRegistered<PermissionManager>()) {
+      return false;
+    }
+    return getIt<PermissionManager>().can(
+      PermissionResources.approvals,
+      PermissionAction.view,
+    );
+  }
+
   void _handleControllerChanged() {
     if (!mounted) {
       return;
@@ -948,7 +959,7 @@ class _RentalPageState extends State<RentalPage> {
   }
 
   List<Widget> _buildDetailActions(RentalRecord record) {
-    final isProcessing = _isProcessing(record.id) || _isLoading;
+    final isProcessing = _isProcessing(record.id);
     final actions = <Widget>[];
 
     if (_canSubmit(record)) {
@@ -994,12 +1005,7 @@ class _RentalPageState extends State<RentalPage> {
     actions.add(
       ShadButton.outline(
         leading: const Icon(lucide.LucideIcons.pencil, size: 16),
-        onPressed: isProcessing
+        onPressed: isProcessing ? null : () => _openEditFromDetail(record),
-            ? null
-            : () {
-                Navigator.of(context).maybePop();
-                _handleEdit(record);
-              },
         child: const Text('수정'),
       ),
     );
@@ -1007,6 +1013,17 @@ class _RentalPageState extends State<RentalPage> {
     return actions;
   }
 
+  void _openEditFromDetail(RentalRecord record) {
+    final navigator = Navigator.of(context, rootNavigator: true);
+    navigator.pop();
+    WidgetsBinding.instance.addPostFrameCallback((_) async {
+      if (!mounted) {
+        return;
+      }
+      await _handleEdit(record, reopenOnCancel: true);
+    });
+  }
+
   Future<void> _handleCreate() async {
     final record = await _showRentalFormDialog();
     if (record != null) {
@@ -1014,10 +1031,15 @@ class _RentalPageState extends State<RentalPage> {
     }
   }
 
-  Future<void> _handleEdit(RentalRecord record) async {
+  Future<void> _handleEdit(
+    RentalRecord record, {
+    bool reopenOnCancel = false,
+  }) async {
     final updated = await _showRentalFormDialog(initial: record);
     if (updated != null) {
       _selectRecord(updated, openDetail: true);
+    } else if (reopenOnCancel) {
+      _selectRecord(record, openDetail: true);
     }
   }
 
@@ -1805,6 +1827,22 @@ class _RentalPageState extends State<RentalPage> {
         return;
       }
 
+      Future<RentalRecord?> resolveUpdatedRecord(int? id) async {
+        if (id == null) {
+          return null;
+        }
+        final detail = await controller.fetchTransactionDetail(id);
+        if (detail != null) {
+          return detail;
+        }
+        for (final record in controller.records) {
+          if (record.id == id) {
+            return record;
+          }
+        }
+        return null;
+      }
+
       final selectedLookup =
           rentalTypeValue.value == RentalTableSpec.rentalTypes.last
           ? (_returnTransactionType ?? controller.returnTransactionType)
@@ -1898,7 +1936,6 @@ class _RentalPageState extends State<RentalPage> {
             ),
             refreshAfter: false,
           );
-          result = updated;
           final currentLines =
               initialRecord.raw?.lines ?? const <StockTransactionLine>[];
           final currentCustomers =
@@ -1922,6 +1959,8 @@ class _RentalPageState extends State<RentalPage> {
             );
           }
           await controller.refresh();
+          final refreshed = await resolveUpdatedRecord(transactionId);
+          result = refreshed ?? updated;
           updateSaving(false);
           if (!mounted) {
             return;
@@ -1993,7 +2032,8 @@ class _RentalPageState extends State<RentalPage> {
             approval: approvalInput,
           ),
         );
-        result = created;
+        final refreshed = await resolveUpdatedRecord(created.id);
+        result = refreshed ?? created;
         updateSaving(false);
         if (!mounted) {
           return;
@@ -2329,9 +2369,26 @@ class _RentalPageState extends State<RentalPage> {
                       width: 500,
                       child: _FormFieldLabel(
                         label: '결재 메모',
-                        child: ShadInput(
+                        child: Column(
-                          controller: approvalNoteController,
+                          crossAxisAlignment: CrossAxisAlignment.start,
-                          maxLines: 2,
+                          children: [
+                            ShadInput(
+                              controller: approvalNoteController,
+                              maxLines: 2,
+                              readOnly: initial != null,
+                              enabled: initial == null,
+                            ),
+                            if (initial != null)
+                              Padding(
+                                padding: const EdgeInsets.only(top: 6),
+                                child: Text(
+                                  '등록된 결재 메모는 수정할 수 없습니다.',
+                                  style: theme.textTheme.small.copyWith(
+                                    color: theme.colorScheme.mutedForeground,
+                                  ),
+                                ),
+                              ),
+                          ],
                         ),
                       ),
                     ),

test/features/inventory/inbound_page_test.dart

@@ -207,4 +207,46 @@ void main() {
     expect(find.textContaining('자동완성에서 선택'), findsOneWidget);
     expect(find.textContaining('창고를 선택'), findsOneWidget);
   });
+
+  testWidgets('입고 상세의 수정 버튼은 수정 모달을 연다', (tester) async {
+    final view = tester.view;
+    view.physicalSize = const Size(1280, 900);
+    view.devicePixelRatio = 1.0;
+    addTearDown(() {
+      view.resetPhysicalSize();
+      view.resetDevicePixelRatio();
+    });
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: ScaffoldMessenger(
+          child: PermissionScope(
+            manager: PermissionManager(),
+            child: ShadTheme(
+              data: SuperportShadTheme.light(),
+              child: Scaffold(
+                body: InboundPage(routeUri: Uri.parse('/inventory/inbound')),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.text('TX-20240301-001').first);
+    await tester.pumpAndSettle();
+
+    expect(find.text('입고 상세'), findsOneWidget);
+
+    final editButton = find.widgetWithText(ShadButton, '수정').last;
+    await tester.ensureVisible(editButton);
+    await tester.tap(editButton);
+    await tester.pump();
+
+    await tester.pumpAndSettle(const Duration(milliseconds: 500));
+
+    expect(find.text('입고 수정'), findsOneWidget);
+    expect(find.widgetWithText(ShadButton, '저장'), findsWidgets);
+  });
 }

test/features/inventory/outbound_page_test.dart

@@ -66,4 +66,45 @@ void main() {
     expect(find.textContaining('자동완성에서 선택'), findsOneWidget);
     expect(find.text('창고를 선택하세요.'), findsOneWidget);
   });
+
+  testWidgets('출고 상세의 수정 버튼은 수정 모달을 연다', (tester) async {
+    final view = tester.view;
+    view.physicalSize = const Size(1280, 900);
+    view.devicePixelRatio = 1.0;
+    addTearDown(() {
+      view.resetPhysicalSize();
+      view.resetDevicePixelRatio();
+    });
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: ScaffoldMessenger(
+          child: PermissionScope(
+            manager: PermissionManager(),
+            child: ShadTheme(
+              data: SuperportShadTheme.light(),
+              child: Scaffold(
+                body: OutboundPage(routeUri: Uri.parse('/inventory/outbound')),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.text('TX-20240302-010').first);
+    await tester.pumpAndSettle();
+
+    expect(find.text('출고 상세'), findsOneWidget);
+
+    final editButton = find.widgetWithText(ShadButton, '수정').last;
+    await tester.ensureVisible(editButton);
+    await tester.tap(editButton);
+    await tester.pump();
+    await tester.pumpAndSettle(const Duration(milliseconds: 500));
+
+    expect(find.text('출고 수정'), findsOneWidget);
+    expect(find.widgetWithText(ShadButton, '저장'), findsWidgets);
+  });
 }

test/features/inventory/rental_page_test.dart

@@ -66,4 +66,45 @@ void main() {
     expect(find.textContaining('자동완성에서 선택'), findsOneWidget);
     expect(find.text('최소 1개의 고객사를 선택하세요.'), findsOneWidget);
   });
+
+  testWidgets('대여 상세의 수정 버튼은 수정 모달을 연다', (tester) async {
+    final view = tester.view;
+    view.physicalSize = const Size(1280, 900);
+    view.devicePixelRatio = 1.0;
+    addTearDown(() {
+      view.resetPhysicalSize();
+      view.resetDevicePixelRatio();
+    });
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: ScaffoldMessenger(
+          child: PermissionScope(
+            manager: PermissionManager(),
+            child: ShadTheme(
+              data: SuperportShadTheme.light(),
+              child: Scaffold(
+                body: RentalPage(routeUri: Uri.parse('/inventory/rental')),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.text('TX-20240305-030').first);
+    await tester.pumpAndSettle();
+
+    expect(find.text('대여 상세'), findsOneWidget);
+
+    final editButton = find.widgetWithText(ShadButton, '수정').last;
+    await tester.ensureVisible(editButton);
+    await tester.tap(editButton);
+    await tester.pump();
+    await tester.pumpAndSettle(const Duration(milliseconds: 500));
+
+    expect(find.text('대여 수정'), findsOneWidget);
+    expect(find.widgetWithText(ShadButton, '저장'), findsWidgets);
+  });
 }

test/helpers/inventory_test_stubs.dart

@@ -240,6 +240,15 @@ class _StubStockTransactionRepository implements StockTransactionRepository {
   }) : _transactions = transactions;
 
   final List<StockTransaction> _transactions;
+  StockTransaction _findTransaction(int id) {
+    final index = _transactions.indexWhere(
+      (transaction) => transaction.id == id,
+    );
+    if (index == -1) {
+      throw StateError('Transaction $id not found');
+    }
+    return _transactions[index];
+  }
 
   @override
   Future<PaginatedResult<StockTransaction>> list({
@@ -302,8 +311,8 @@ class _StubStockTransactionRepository implements StockTransactionRepository {
   Future<StockTransaction> fetchDetail(
     int id, {
     List<String> include = const ['lines', 'customers', 'approval'],
-  }) {
+  }) async {
-    throw UnimplementedError();
+    return _findTransaction(id);
   }
 
   @override
@@ -359,14 +368,9 @@ class _StubStockTransactionRepository implements StockTransactionRepository {
     int id,
     StockTransaction Function(StockTransaction transaction) transform,
   ) async {
-    final index = _transactions.indexWhere(
+    final current = _findTransaction(id);
-      (transaction) => transaction.id == id,
-    );
-    if (index == -1) {
-      throw StateError('Transaction $id not found');
-    }
-    final current = _transactions[index];
     final updated = transform(current);
+    final index = _transactions.indexOf(current);
     _transactions[index] = updated;
     return updated;
   }