feat(app): add vworld geocoding and native ads placeholders

lib/presentation/pages/share/share_screen.dart

@@ -13,6 +13,7 @@ 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/restaurant_provider.dart';
+import 'package:lunchpick/presentation/widgets/native_ad_placeholder.dart';
 import 'package:uuid/uuid.dart';
 
 class ShareScreen extends ConsumerStatefulWidget {
@@ -144,7 +145,9 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
                   subtitle: '내 맛집 리스트를 다른 사람과 공유하세요',
                   child: _buildSendSection(isDark),
                 ),
-                const SizedBox(height: 20),
+                const SizedBox(height: 16),
+                const NativeAdPlaceholder(),
+                const SizedBox(height: 16),
                 _ShareCard(
                   isDark: isDark,
                   icon: Icons.download_rounded,