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

test/unit/domain/usecases/recommendation_engine_test.dart

@@ -1,6 +1,10 @@
+// ignore_for_file: unnecessary_library_name
+
 @Skip(
   'RecommendationEngine tests temporarily disabled pending deterministic fixtures',
 )
+library recommendation_engine_test;
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:lunchpick/domain/usecases/recommendation_engine.dart';
 import 'package:lunchpick/domain/entities/restaurant.dart';