feat(ads): 네이티브 광고 적용 및 디버그 스위치 이동

lib/presentation/pages/share/share_screen.dart

@@ -12,6 +12,7 @@ import 'package:lunchpick/domain/entities/restaurant.dart';
 import 'package:lunchpick/domain/entities/share_device.dart';
 import 'package:lunchpick/presentation/providers/ad_provider.dart';
 import 'package:lunchpick/presentation/providers/bluetooth_provider.dart';
+import 'package:lunchpick/presentation/providers/debug_share_preview_provider.dart';
 import 'package:lunchpick/presentation/providers/restaurant_provider.dart';
 import 'package:lunchpick/presentation/widgets/native_ad_placeholder.dart';
 import 'package:uuid/uuid.dart';
@@ -85,9 +86,9 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
   bool _isScanning = false;
   List<ShareDevice>? _nearbyDevices;
   StreamSubscription<String>? _dataSubscription;
+  ProviderSubscription<bool>? _debugPreviewSub;
   final _uuid = const Uuid();
   bool _debugPreviewEnabled = false;
-  bool _debugPreviewProcessing = false;
   Timer? _debugPreviewTimer;
 
   @override
@@ -97,11 +98,25 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
     _dataSubscription = bluetoothService.onDataReceived.listen((payload) {
       _handleIncomingData(payload);
     });
+    _debugPreviewEnabled = ref.read(debugSharePreviewProvider);
+    if (_debugPreviewEnabled) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        _handleDebugToggleChange(true);
+      });
+    }
+    _debugPreviewSub = ref.listenManual<bool>(debugSharePreviewProvider, (
+      previous,
+      next,
+    ) {
+      if (previous == next) return;
+      _handleDebugToggleChange(next);
+    });
   }
 
   @override
   void dispose() {
     _dataSubscription?.cancel();
+    _debugPreviewSub?.close();
     ref.read(bluetoothServiceProvider).stopListening();
     _debugPreviewTimer?.cancel();
     super.dispose();
@@ -132,10 +147,6 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
               mainAxisAlignment: MainAxisAlignment.center,
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: [
-                if (kDebugMode) ...[
-                  _buildDebugToggle(isDark),
-                  const SizedBox(height: 16),
-                ],
                 _ShareCard(
                   isDark: isDark,
                   icon: Icons.upload_rounded,
@@ -146,7 +157,7 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
                   child: _buildSendSection(isDark),
                 ),
                 const SizedBox(height: 16),
-                const NativeAdPlaceholder(),
+                const NativeAdPlaceholder(height: 220),
                 const SizedBox(height: 16),
                 _ShareCard(
                   isDark: isDark,
@@ -577,87 +588,16 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
     );
   }
 
-  Widget _buildDebugToggle(bool isDark) {
-    return Card(
-      color: isDark ? AppColors.darkSurface : AppColors.lightSurface,
-      elevation: 1,
-      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
-      child: Padding(
-        padding: const EdgeInsets.all(14),
-        child: Row(
-          children: [
-            Container(
-              padding: const EdgeInsets.all(10),
-              decoration: BoxDecoration(
-                color: AppColors.lightPrimary.withOpacity(0.1),
-                shape: BoxShape.circle,
-              ),
-              child: const Icon(
-                Icons.science_outlined,
-                color: AppColors.lightPrimary,
-              ),
-            ),
-            const SizedBox(width: 12),
-            Expanded(
-              child: Column(
-                crossAxisAlignment: CrossAxisAlignment.start,
-                children: [
-                  Text(
-                    '테스트 토글 (디버그 전용)',
-                    style: AppTypography.body1(
-                      isDark,
-                    ).copyWith(fontWeight: FontWeight.w600),
-                  ),
-                  const SizedBox(height: 4),
-                  Text(
-                    _debugPreviewEnabled
-                        ? '샘플 코드·기기와 수신 데이터가 자동으로 표시됩니다.'
-                        : '토글을 켜면 광고/권한 없이 공유 UI를 미리 볼 수 있습니다.',
-                    style: AppTypography.caption(isDark),
-                  ),
-                ],
-              ),
-            ),
-            const SizedBox(width: 8),
-            if (_debugPreviewProcessing)
-              const SizedBox(
-                width: 22,
-                height: 22,
-                child: CircularProgressIndicator(strokeWidth: 2),
-              ),
-            const SizedBox(width: 8),
-            Switch.adaptive(
-              value: _debugPreviewEnabled,
-              onChanged: _debugPreviewProcessing
-                  ? null
-                  : (value) {
-                      _toggleDebugPreview(value);
-                    },
-              activeColor: AppColors.lightPrimary,
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Future<void> _toggleDebugPreview(bool enabled) async {
-    if (_debugPreviewProcessing) return;
+  Future<void> _handleDebugToggleChange(bool enabled) async {
+    if (!mounted) return;
     setState(() {
-      _debugPreviewProcessing = true;
+      _debugPreviewEnabled = enabled;
     });
-
     if (enabled) {
       await _startDebugPreviewFlow();
     } else {
       _stopDebugPreviewFlow();
     }
-
-    if (!mounted) return;
-    setState(() {
-      _debugPreviewEnabled = enabled;
-      _debugPreviewProcessing = false;
-    });
   }
 
   Future<void> _startDebugPreviewFlow() async {