style: apply dart format across project

lib/screens/add_subscription_screen.dart

@@ -62,14 +62,14 @@ class _AddSubscriptionScreenState extends State<AddSubscriptionScreen>
             crossAxisAlignment: CrossAxisAlignment.start,
             children: [
               SizedBox(height: MediaQuery.of(context).padding.top + 60),
-              
+
               // 헤더 섹션
               AddSubscriptionHeader(
                 controller: _controller,
                 fadeAnimation: _controller.fadeAnimation!,
                 slideAnimation: _controller.slideAnimation!,
               ),
-              
+
               // 서비스 정보 폼
               AddSubscriptionForm(
                 controller: _controller,
@@ -78,7 +78,7 @@ class _AddSubscriptionScreenState extends State<AddSubscriptionScreen>
                 setState: setState,
               ),
               const SizedBox(height: 16),
-              
+
               // 이벤트/할인 섹션
               AddSubscriptionEventSection(
                 controller: _controller,
@@ -87,7 +87,7 @@ class _AddSubscriptionScreenState extends State<AddSubscriptionScreen>
                 setState: setState,
               ),
               const SizedBox(height: 32),
-              
+
               // 저장 버튼
               AddSubscriptionSaveButton(
                 controller: _controller,
@@ -101,4 +101,4 @@ class _AddSubscriptionScreenState extends State<AddSubscriptionScreen>
       ),
     );
   }
-}
+}