feat(app): add manual entry and sharing flows

lib/core/widgets/loading_indicator.dart

@@ -2,15 +2,15 @@ import 'package:flutter/material.dart';
 import '../constants/app_colors.dart';
 
 /// 로딩 인디케이터 위젯
-/// 
+///
 /// 앱 전체에서 일관된 로딩 표시를 위한 공통 위젯
 class LoadingIndicator extends StatelessWidget {
   /// 로딩 메시지 (선택사항)
   final String? message;
-  
+
   /// 인디케이터 크기
   final double size;
-  
+
   /// 스트로크 너비
   final double strokeWidth;
 
@@ -24,7 +24,7 @@ class LoadingIndicator extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final isDark = Theme.of(context).brightness == Brightness.dark;
-    
+
     return Center(
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
@@ -46,8 +46,8 @@ class LoadingIndicator extends StatelessWidget {
               message!,
               style: TextStyle(
                 fontSize: 14,
-                color: isDark 
-                    ? AppColors.darkTextSecondary 
+                color: isDark
+                    ? AppColors.darkTextSecondary
                     : AppColors.lightTextSecondary,
               ),
               textAlign: TextAlign.center,
@@ -60,12 +60,12 @@ class LoadingIndicator extends StatelessWidget {
 }
 
 /// 전체 화면 로딩 인디케이터
-/// 
+///
 /// 화면 전체를 덮는 로딩 표시를 위한 위젯
 class FullScreenLoadingIndicator extends StatelessWidget {
   /// 로딩 메시지 (선택사항)
   final String? message;
-  
+
   /// 배경 투명도
   final double backgroundOpacity;
 
@@ -78,11 +78,12 @@ class FullScreenLoadingIndicator extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final isDark = Theme.of(context).brightness == Brightness.dark;
-    
+
     return Container(
-      color: (isDark ? Colors.black : Colors.white)
-          .withValues(alpha: backgroundOpacity),
+      color: (isDark ? Colors.black : Colors.white).withValues(
+        alpha: backgroundOpacity,
+      ),
       child: LoadingIndicator(message: message),
     );
   }
-}
+}