feat(approvals): 결재 상세 전표 카드 개편

- 상단 요약부를 전용 Highlight 카드로 교체하고 출발지/도착지 및 라인 품목 정보를 한 화면에서 제공
- 결재 상세 다이얼로그에 통화 포매터를 연결하고 새 카드 위젯을 포함해 금액·수량을 명시적으로 표현
- 입고/출고/대여 별 라우팅/품목 정보를 검증하는 위젯 테스트를 추가해 회귀 안정성을 확보

test/features/approvals/presentation/dialogs/approval_detail_dialog_test.dart

@@ -61,7 +61,7 @@ void main() {
             uom: StockTransactionUomSummary(id: 3, name: 'EA'),
           ),
           quantity: 12,
-          unitPrice: 0,
+          unitPrice: 450000,
           note: '라인 비고',
         ),
       ],
@@ -151,7 +151,6 @@ void main() {
     await controller.loadTemplates(force: true);
     await controller.loadActionOptions(force: true);
     await controller.selectApproval(sampleApproval.id!);
-    await Future<void>.delayed(const Duration(milliseconds: 10));
     expect(controller.templates, isNotEmpty);
     expect(controller.selected, isNotNull);
     expect(controller.canProceedSelected, isTrue);
@@ -197,6 +196,128 @@ void main() {
     expect(find.text('템플릿 적용'), findsOneWidget);
   });
 
+  testWidgets('입고 결재 상세 상단 카드가 파트너와 금액을 요약한다', (tester) async {
+    await openDialog(tester);
+
+    final highlightCard = find.byKey(
+      const ValueKey('approval_transaction_highlight_card'),
+    );
+    expect(highlightCard, findsOneWidget);
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('출발지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('한빛상사')),
+      findsWidgets,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('도착지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('1센터 (WH-001)')),
+      findsWidgets,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('라인 품목')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('P-501 · 샘플 제품')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('총 금액')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('₩5,400,000')),
+      findsWidgets,
+    );
+  });
+
+  testWidgets('출고 결재 상세 상단 카드가 고객사 정보를 노출한다', (tester) async {
+    final outboundTransaction = sampleTransaction.copyWith(
+      type: StockTransactionType(id: 2, name: '출고'),
+      customers: [
+        StockTransactionCustomer(
+          id: 9002,
+          customer: StockTransactionCustomerSummary(
+            id: 4002,
+            code: 'C-4002',
+            name: '고객B',
+          ),
+        ),
+      ],
+    );
+
+    stockRepository.detail = outboundTransaction;
+    await controller.selectApproval(sampleApproval.id!);
+    await openDialog(tester);
+
+    final highlightCard = find.byKey(
+      const ValueKey('approval_transaction_highlight_card'),
+    );
+    expect(highlightCard, findsOneWidget);
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('출발지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('1센터 (WH-001)')),
+      findsWidgets,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('도착지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('고객B')),
+      findsOneWidget,
+    );
+  });
+
+  testWidgets('대여 결재 상세 상단 카드가 예상 반납일을 표시한다', (tester) async {
+    final rentalTransaction = sampleTransaction.copyWith(
+      type: StockTransactionType(id: 3, name: '대여'),
+      customers: [
+        StockTransactionCustomer(
+          id: 9003,
+          customer: StockTransactionCustomerSummary(
+            id: 4003,
+            code: 'C-4003',
+            name: '고객C',
+          ),
+        ),
+      ],
+    );
+
+    stockRepository.detail = rentalTransaction;
+    await controller.selectApproval(sampleApproval.id!);
+    await openDialog(tester);
+
+    final highlightCard = find.byKey(
+      const ValueKey('approval_transaction_highlight_card'),
+    );
+    expect(highlightCard, findsOneWidget);
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('도착지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('예상 반납일')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(
+        of: highlightCard,
+        matching: find.text('2024-01-10 00:00'),
+      ),
+      findsOneWidget,
+    );
+  });
+
   testWidgets('템플릿 적용 버튼을 누르면 assignSteps가 호출되고 성공 토스트를 노출한다', (tester) async {
     await openDialog(tester);