feat: Equipment DTO 호환성 수정 전 백업 커밋

- Equipment DTO 필드명 변경 (name → equipment_number 등) 완료
- Phase 1-7 파생 수정사항 체계적 진행 예정
- 통합 모델 정리, Controller 동기화, UI 업데이트 예정

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

test/utils/currency_formatter_test.dart

@@ -0,0 +1,23 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:superport/utils/currency_formatter.dart';
+
+void main() {
+  group('CurrencyFormatter Tests', () {
+    test('formatKRW should format number with Korean won symbol and commas', () {
+      expect(CurrencyFormatter.formatKRW(2000000), '₩2,000,000');
+      expect(CurrencyFormatter.formatKRW(1000), '₩1,000');
+      expect(CurrencyFormatter.formatKRW(100), '₩100');
+      expect(CurrencyFormatter.formatKRW(0), '');
+      expect(CurrencyFormatter.formatKRW(null), '');
+    });
+
+    test('parseKRW should extract numeric value from formatted string', () {
+      expect(CurrencyFormatter.parseKRW('₩2,000,000'), 2000000);
+      expect(CurrencyFormatter.parseKRW('₩1,000'), 1000);
+      expect(CurrencyFormatter.parseKRW('₩100'), 100);
+      expect(CurrencyFormatter.parseKRW('2000000'), 2000000);
+      expect(CurrencyFormatter.parseKRW(''), null);
+      expect(CurrencyFormatter.parseKRW(null), null);
+    });
+  });
+}