feat(app): finalize ad gated flows and weather

- add AppLogger and replace scattered print logging\n- implement ad-gated recommendation flow with reminder handling and calendar link\n- complete Bluetooth share pipeline with ad gate and merge\n- integrate KMA weather API with caching and dart-define decoding\n- add NaverUrlProcessor refactor and restore restaurant repository tests

lib/presentation/pages/share/share_screen.dart

@@ -290,7 +290,16 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
   }
 
   Future<void> _generateShareCode() async {
+    final hasPermission =
+        await PermissionService.checkAndRequestBluetoothPermission();
+    if (!hasPermission) {
+      if (!mounted) return;
+      _showErrorSnackBar('블루투스 권한을 허용해야 공유 코드를 생성할 수 있어요.');
+      return;
+    }
+
     final adService = ref.read(adServiceProvider);
+    if (!mounted) return;
     final adWatched = await adService.showInterstitialAd(context);
     if (!mounted) return;
     if (!adWatched) {
@@ -301,12 +310,17 @@ class _ShareScreenState extends ConsumerState<ShareScreen> {
     final random = Random();
     final code = List.generate(6, (_) => random.nextInt(10)).join();
 
-    setState(() {
-      _shareCode = code;
-    });
-
-    await ref.read(bluetoothServiceProvider).startListening(code);
-    _showSuccessSnackBar('공유 코드가 생성되었습니다.');
+    try {
+      await ref.read(bluetoothServiceProvider).startListening(code);
+      if (!mounted) return;
+      setState(() {
+        _shareCode = code;
+      });
+      _showSuccessSnackBar('공유 코드가 생성되었습니다.');
+    } catch (_) {
+      if (!mounted) return;
+      _showErrorSnackBar('코드를 생성하지 못했습니다. 잠시 후 다시 시도해 주세요.');
+    }
   }
 
   Future<void> _scanDevices() async {