feat: adopt material 3 theme and billing adjustments

lib/widgets/native_ad_widget.dart

@@ -2,13 +2,17 @@ import 'package:flutter/material.dart';
 import 'package:google_mobile_ads/google_mobile_ads.dart';
 import 'package:flutter/foundation.dart' show kIsWeb;
 import 'dart:io' show Platform;
-import 'glassmorphism_card.dart';
+import 'dart:async';
+// Glass 제거: Material 3 Card 사용
 import '../main.dart' show enableAdMob;
+import '../theme/ui_constants.dart';
 
 /// 구글 네이티브 광고 위젯 (AdMob NativeAd)
 /// SRP에 따라 광고 전용 위젯으로 분리
 class NativeAdWidget extends StatefulWidget {
-  const NativeAdWidget({Key? key}) : super(key: key);
+  final bool useOuterPadding; // true이면 외부에서 페이지 패딩을 제공
+  const NativeAdWidget({Key? key, this.useOuterPadding = false})
+      : super(key: key);
 
   @override
   State<NativeAdWidget> createState() => _NativeAdWidgetState();
@@ -19,6 +23,7 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
   bool _isLoaded = false;
   String? _error;
   bool _isAdLoading = false; // 광고 로드 중복 방지 플래그
+  Timer? _refreshTimer; // 주기적 리프레시 타이머
 
   @override
   void initState() {
@@ -43,24 +48,66 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
       return;
     }
 
-    _nativeAd = NativeAd(
-      adUnitId: _testAdUnitId(), // 실제 광고 단위 ID
-      factoryId: 'listTile', // Android/iOS 모두 동일하게 맞춰야 함
-      request: const AdRequest(),
-      listener: NativeAdListener(
-        onAdLoaded: (ad) {
-          setState(() {
-            _isLoaded = true;
-          });
-        },
-        onAdFailedToLoad: (ad, error) {
-          ad.dispose();
-          setState(() {
-            _error = error.message;
-          });
-        },
-      ),
-    )..load();
+    try {
+      // 기존 광고 해제 및 상태 초기화
+      _refreshTimer?.cancel();
+      _nativeAd?.dispose();
+      _error = null;
+      _isLoaded = false;
+
+      _nativeAd = NativeAd(
+        adUnitId: _testAdUnitId(), // 실제 광고 단위 ID
+        // 네이티브 템플릿을 사용하면 NativeAdFactory 등록 없이도 동작합니다.
+        nativeTemplateStyle: NativeTemplateStyle(
+          templateType: TemplateType.small,
+          mainBackgroundColor: const Color(0x00000000),
+          cornerRadius: 12,
+        ),
+        request: const AdRequest(),
+        listener: NativeAdListener(
+          onAdLoaded: (ad) {
+            setState(() {
+              _isLoaded = true;
+            });
+            _scheduleRefresh();
+          },
+          onAdFailedToLoad: (ad, error) {
+            ad.dispose();
+            setState(() {
+              _error = error.message;
+            });
+            // 실패 시에도 일정 시간 후 재시도
+            _scheduleRefresh();
+          },
+        ),
+      )..load();
+    } catch (e) {
+      // 템플릿 미지원 등 예외 시 광고를 비활성화하고 크래시 방지
+      setState(() {
+        _error = e.toString();
+      });
+      _scheduleRefresh();
+    }
+  }
+
+  /// 30초 후 새 광고로 교체
+  void _scheduleRefresh() {
+    _refreshTimer?.cancel();
+    _refreshTimer = Timer(const Duration(seconds: 30), _refreshAd);
+  }
+
+  void _refreshAd() {
+    if (!mounted) return;
+    // 다음 로드를 위해 상태 초기화 후 새 광고 요청
+    try {
+      _nativeAd?.dispose();
+    } catch (_) {}
+    setState(() {
+      _nativeAd = null;
+      _isLoaded = false;
+      _error = null;
+    });
+    _loadAd();
   }
 
   /// 광고 단위 ID 반환 함수
@@ -79,19 +126,25 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
   @override
   void dispose() {
     _nativeAd?.dispose();
+    _refreshTimer?.cancel();
     super.dispose();
   }
 
   /// 웹용 광고 플레이스홀더 위젯
   Widget _buildWebPlaceholder() {
     return Padding(
-      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
-      child: GlassmorphismCard(
-        borderRadius: 16,
-        blur: 10,
-        opacity: 0.1,
+      padding: EdgeInsets.symmetric(
+        horizontal:
+            widget.useOuterPadding ? 0 : UIConstants.pageHorizontalPadding,
+        vertical: UIConstants.adVerticalPadding,
+      ),
+      child: Card(
+        elevation: 1,
+        shape: const RoundedRectangleBorder(
+          borderRadius: BorderRadius.zero,
+        ),
         child: Container(
-          height: 80,
+          height: UIConstants.adCardHeight,
           padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
           child: Row(
             children: [
@@ -99,13 +152,16 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
                 width: 64,
                 height: 64,
                 decoration: BoxDecoration(
-                  color: Colors.grey[300],
-                  borderRadius: BorderRadius.circular(8),
+                  color: Theme.of(context)
+                      .colorScheme
+                      .surfaceContainerHighest
+                      .withValues(alpha: 0.5),
+                  borderRadius: BorderRadius.zero,
                 ),
-                child: const Center(
+                child: Center(
                   child: Icon(
                     Icons.ad_units,
-                    color: Colors.grey,
+                    color: Theme.of(context).colorScheme.onSurfaceVariant,
                     size: 32,
                   ),
                 ),
@@ -120,8 +176,11 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
                       height: 14,
                       width: 120,
                       decoration: BoxDecoration(
-                        color: Colors.grey[300],
-                        borderRadius: BorderRadius.circular(4),
+                        color: Theme.of(context)
+                            .colorScheme
+                            .surfaceContainerHighest
+                            .withValues(alpha: 0.5),
+                        borderRadius: BorderRadius.zero,
                       ),
                     ),
                     const SizedBox(height: 8),
@@ -129,8 +188,11 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
                       height: 10,
                       width: 180,
                       decoration: BoxDecoration(
-                        color: Colors.grey[200],
-                        borderRadius: BorderRadius.circular(4),
+                        color: Theme.of(context)
+                            .colorScheme
+                            .surfaceContainerHighest
+                            .withValues(alpha: 0.4),
+                        borderRadius: BorderRadius.zero,
                       ),
                     ),
                   ],
@@ -140,15 +202,18 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
                 width: 60,
                 height: 24,
                 decoration: BoxDecoration(
-                  color: Colors.blue[100],
-                  borderRadius: BorderRadius.circular(12),
+                  color: Theme.of(context)
+                      .colorScheme
+                      .primary
+                      .withValues(alpha: 0.15),
+                  borderRadius: BorderRadius.zero,
                 ),
-                child: const Center(
+                child: Center(
                   child: Text(
-                    '광고영역',
+                    'ads',
                     style: TextStyle(
                       fontSize: 12,
-                      color: Colors.blue,
+                      color: Theme.of(context).colorScheme.primary,
                       fontWeight: FontWeight.bold,
                     ),
                   ),
@@ -179,27 +244,29 @@ class _NativeAdWidgetState extends State<NativeAdWidget> {
     }
 
     if (_error != null) {
-      // 광고 로드 실패 시 빈 공간 반환
-      return const SizedBox.shrink();
+      // 실패 시에도 동일 높이의 플레이스홀더를 유지하여 레이아웃 점프 방지
+      return _buildWebPlaceholder();
     }
 
     if (!_isLoaded) {
-      // 광고 로딩 중 로딩 인디케이터 표시
-      return const Padding(
-        padding: EdgeInsets.symmetric(vertical: 12),
-        child: Center(child: CircularProgressIndicator()),
-      );
+      // 로딩 중에도 실제 광고와 동일한 높이의 스켈레톤을 유지
+      return _buildWebPlaceholder();
     }
 
     // 광고 정상 노출
     return Padding(
-      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
-      child: GlassmorphismCard(
-        borderRadius: 16,
-        blur: 10,
-        opacity: 0.1,
+      padding: EdgeInsets.symmetric(
+        horizontal:
+            widget.useOuterPadding ? 0 : UIConstants.pageHorizontalPadding,
+        vertical: UIConstants.adVerticalPadding,
+      ),
+      child: Card(
+        elevation: 1,
+        shape: const RoundedRectangleBorder(
+          borderRadius: BorderRadius.zero,
+        ),
         child: SizedBox(
-          height: 80, // 네이티브 광고 높이 조정
+          height: UIConstants.adCardHeight,
           child: AdWidget(ad: _nativeAd!),
         ),
       ),