feat: 글래스모피즘 디자인 시스템 및 색상 가이드 전면 적용

- @doc/color.md 가이드라인에 따른 색상 시스템 전면 개편
- 딥 블루(#2563EB), 스카이 블루(#60A5FA) 메인 컬러로 변경
- 모든 화면과 위젯에 글래스모피즘 효과 일관성 있게 적용
- darkNavy, navyGray 등 새로운 텍스트 색상 체계 도입
- 공통 스낵바 및 다이얼로그 컴포넌트 추가
- Claude AI 프로젝트 컨텍스트 파일(CLAUDE.md) 추가

영향받은 컴포넌트:
- 10개 스크린 (main, settings, detail, splash 등)
- 30개 이상 위젯 (buttons, cards, forms 등)
- 테마 시스템 (AppColors, AppTheme)

🤖 Generated with Claude Code

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

lib/widgets/common/buttons/danger_button.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import '../../../theme/app_colors.dart';
 
 /// 위험한 액션에 사용되는 Danger 버튼
 /// 삭제, 취소, 종료 등의 위험한 액션에 사용됩니다.
@@ -39,7 +40,7 @@ class DangerButton extends StatefulWidget {
 class _DangerButtonState extends State<DangerButton> {
   bool _isHovered = false;
   
-  static const Color _dangerColor = Color(0xFFDC2626);
+  static const Color _dangerColor = AppColors.dangerColor;
 
   Future<void> _handlePress() async {
     if (widget.requireConfirmation) {
@@ -62,7 +63,7 @@ class _DangerButtonState extends State<DangerButton> {
               Container(
                 padding: const EdgeInsets.all(16),
                 decoration: BoxDecoration(
-                  color: _dangerColor.withOpacity(0.1),
+                  color: _dangerColor.withValues(alpha: 0.1),
                   borderRadius: BorderRadius.circular(12),
                 ),
                 child: Icon(
@@ -98,7 +99,7 @@ class _DangerButtonState extends State<DangerButton> {
               ),
               child: Text(
                 widget.text,
-                style: const TextStyle(color: Colors.white),
+                style: const TextStyle(color: AppColors.pureWhite),
               ),
             ),
           ],
@@ -126,14 +127,14 @@ class _DangerButtonState extends State<DangerButton> {
         onPressed: widget.onPressed != null ? _handlePress : null,
         style: ElevatedButton.styleFrom(
           backgroundColor: _dangerColor,
-          foregroundColor: Colors.white,
+          foregroundColor: AppColors.pureWhite,
           shape: RoundedRectangleBorder(
             borderRadius: BorderRadius.circular(widget.borderRadius),
           ),
           padding: widget.padding ?? const EdgeInsets.symmetric(vertical: 16),
-          elevation: widget.enableHoverEffect && _isHovered ? 8 : 4,
-          shadowColor: _dangerColor.withOpacity(0.5),
-          disabledBackgroundColor: _dangerColor.withOpacity(0.6),
+          elevation: widget.enableHoverEffect && _isHovered ? 2 : 0,
+          shadowColor: Colors.black.withValues(alpha: 0.08),
+          disabledBackgroundColor: _dangerColor.withValues(alpha: 0.6),
         ),
         child: Row(
           mainAxisAlignment: MainAxisAlignment.center,
@@ -142,7 +143,7 @@ class _DangerButtonState extends State<DangerButton> {
             if (widget.icon != null) ...[
               Icon(
                 widget.icon,
-                color: Colors.white,
+                color: AppColors.pureWhite,
                 size: _isHovered ? 24 : 20,
               ),
               const SizedBox(width: 8),
@@ -152,7 +153,7 @@ class _DangerButtonState extends State<DangerButton> {
               style: TextStyle(
                 fontSize: widget.fontSize,
                 fontWeight: FontWeight.w600,
-                color: Colors.white,
+                color: AppColors.pureWhite,
               ),
             ),
           ],

lib/widgets/common/buttons/primary_button.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import '../../../theme/app_colors.dart';
 
 /// 주요 액션에 사용되는 Primary 버튼
 /// 저장, 추가, 확인 등의 주요 액션에 사용됩니다.
@@ -43,7 +44,7 @@ class _PrimaryButtonState extends State<PrimaryButton> {
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final effectiveBackgroundColor = widget.backgroundColor ?? theme.primaryColor;
-    final effectiveForegroundColor = widget.foregroundColor ?? Colors.white;
+    final effectiveForegroundColor = widget.foregroundColor ?? AppColors.pureWhite;
 
     Widget button = AnimatedContainer(
       duration: const Duration(milliseconds: 200),
@@ -61,9 +62,9 @@ class _PrimaryButtonState extends State<PrimaryButton> {
             borderRadius: BorderRadius.circular(widget.borderRadius),
           ),
           padding: widget.padding ?? const EdgeInsets.symmetric(vertical: 16),
-          elevation: widget.enableHoverEffect && _isHovered ? 8 : 4,
-          shadowColor: effectiveBackgroundColor.withOpacity(0.5),
-          disabledBackgroundColor: effectiveBackgroundColor.withOpacity(0.6),
+          elevation: widget.enableHoverEffect && _isHovered ? 2 : 0,
+          shadowColor: Colors.black.withValues(alpha: 0.08),
+          disabledBackgroundColor: effectiveBackgroundColor.withValues(alpha: 0.6),
         ),
         child: widget.isLoading
             ? SizedBox(

lib/widgets/common/buttons/secondary_button.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import '../../../theme/app_colors.dart';
 
 /// 부차적인 액션에 사용되는 Secondary 버튼
 /// 취소, 되돌아가기, 부가 옵션 등에 사용됩니다.
@@ -42,10 +43,8 @@ class _SecondaryButtonState extends State<SecondaryButton> {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
-    final effectiveBorderColor = widget.borderColor ?? 
-        theme.colorScheme.onSurface.withOpacity(0.2);
-    final effectiveTextColor = widget.textColor ?? 
-        theme.colorScheme.onSurface.withOpacity(0.8);
+    final effectiveBorderColor = widget.borderColor ?? AppColors.secondaryColor;
+    final effectiveTextColor = widget.textColor ?? AppColors.primaryColor;
 
     Widget button = AnimatedContainer(
       duration: const Duration(milliseconds: 200),
@@ -63,7 +62,7 @@ class _SecondaryButtonState extends State<SecondaryButton> {
           ),
           side: BorderSide(
             color: _isHovered 
-                ? effectiveBorderColor.withOpacity(0.4)
+                ? effectiveBorderColor.withValues(alpha: 0.4)
                 : effectiveBorderColor,
             width: widget.borderWidth,
           ),
@@ -72,7 +71,7 @@ class _SecondaryButtonState extends State<SecondaryButton> {
             horizontal: 24,
           ),
           backgroundColor: _isHovered 
-              ? theme.colorScheme.onSurface.withOpacity(0.05)
+              ? AppColors.glassBackground
               : Colors.transparent,
         ),
         child: Row(
@@ -142,13 +141,13 @@ class _TextLinkButtonState extends State<TextLinkButton> {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
-    final effectiveColor = widget.color ?? theme.colorScheme.primary;
+    final effectiveColor = widget.color ?? AppColors.primaryColor;
 
     Widget button = AnimatedContainer(
       duration: const Duration(milliseconds: 200),
       decoration: BoxDecoration(
         color: _isHovered 
-            ? theme.colorScheme.onSurface.withOpacity(0.05)
+            ? theme.colorScheme.onSurface.withValues(alpha: 0.05)
             : Colors.transparent,
         borderRadius: BorderRadius.circular(8),
       ),