style: apply dart format across project

lib/utils/haptic_feedback_helper.dart

@@ -4,42 +4,42 @@ import 'dart:io' show Platform;
 /// 햅틱 피드백을 관리하는 헬퍼 클래스
 class HapticFeedbackHelper {
   static bool _isEnabled = true;
-  
+
   /// 햅틱 피드백 활성화 여부 설정
   static void setEnabled(bool enabled) {
     _isEnabled = enabled;
   }
-  
+
   /// 가벼운 햅틱 피드백
   static Future<void> lightImpact() async {
     if (!_isEnabled || !_isPlatformSupported()) return;
     await HapticFeedback.lightImpact();
   }
-  
+
   /// 중간 강도 햅틱 피드백
   static Future<void> mediumImpact() async {
     if (!_isEnabled || !_isPlatformSupported()) return;
     await HapticFeedback.mediumImpact();
   }
-  
+
   /// 강한 햅틱 피드백
   static Future<void> heavyImpact() async {
     if (!_isEnabled || !_isPlatformSupported()) return;
     await HapticFeedback.heavyImpact();
   }
-  
+
   /// 선택 햅틱 피드백 (iOS의 경우 Taptic Engine)
   static Future<void> selectionClick() async {
     if (!_isEnabled || !_isPlatformSupported()) return;
     await HapticFeedback.selectionClick();
   }
-  
+
   /// 진동 패턴 (Android)
   static Future<void> vibrate({int duration = 50}) async {
     if (!_isEnabled || !_isPlatformSupported()) return;
     await HapticFeedback.vibrate();
   }
-  
+
   /// 성공 피드백 패턴
   static Future<void> success() async {
     if (!_isEnabled || !_isPlatformSupported()) return;
@@ -47,7 +47,7 @@ class HapticFeedbackHelper {
     await Future.delayed(const Duration(milliseconds: 100));
     await HapticFeedback.lightImpact();
   }
-  
+
   /// 에러 피드백 패턴
   static Future<void> error() async {
     if (!_isEnabled || !_isPlatformSupported()) return;
@@ -55,13 +55,13 @@ class HapticFeedbackHelper {
     await Future.delayed(const Duration(milliseconds: 100));
     await HapticFeedback.heavyImpact();
   }
-  
+
   /// 경고 피드백 패턴
   static Future<void> warning() async {
     if (!_isEnabled || !_isPlatformSupported()) return;
     await HapticFeedback.mediumImpact();
   }
-  
+
   /// 플랫폼이 햅틱 피드백을 지원하는지 확인
   static bool _isPlatformSupported() {
     try {
@@ -71,4 +71,4 @@ class HapticFeedbackHelper {
       return false;
     }
   }
-}
+}