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/data/datasources/remote/naver_url_processor.dart

@@ -0,0 +1,42 @@
+import 'dart:collection';
+
+import 'package:lunchpick/domain/entities/restaurant.dart';
+
+import '../../api/naver_api_client.dart';
+import 'naver_map_parser.dart';
+
+/// 네이버 지도 URL을 처리하고 결과를 캐시하는 경량 프로세서.
+/// - 단축 URL 해석 → 지도 파서 실행
+/// - 동일 URL 재요청 시 메모리 캐시 반환
+class NaverUrlProcessor {
+  final NaverApiClient _apiClient;
+  final NaverMapParser _mapParser;
+  final _cache = HashMap<String, Restaurant>();
+
+  NaverUrlProcessor({NaverApiClient? apiClient, NaverMapParser? mapParser})
+    : _apiClient = apiClient ?? NaverApiClient(),
+      _mapParser = mapParser ?? NaverMapParser(apiClient: apiClient);
+
+  Future<Restaurant> processUrl(
+    String url, {
+    double? userLatitude,
+    double? userLongitude,
+  }) async {
+    final normalizedUrl = url.trim();
+    if (_cache.containsKey(normalizedUrl)) {
+      return _cache[normalizedUrl]!;
+    }
+
+    final resolved = await _apiClient.resolveShortUrl(normalizedUrl);
+    final restaurant = await _mapParser.parseRestaurantFromUrl(
+      resolved,
+      userLatitude: userLatitude,
+      userLongitude: userLongitude,
+    );
+    _cache[normalizedUrl] = restaurant;
+    _cache[resolved] = restaurant;
+    return restaurant;
+  }
+
+  void clearCache() => _cache.clear();
+}