feat(ads): implement interstitial ad trigger on article details view

- Add InterstitialAdManager import to entity_details_page.dart
- Implement interstitial ad trigger on headline tap for different image styles
- Ensure ad trigger is called before navigating to article details page

Author: fulleni

lib/entity_details/view/entity_details_page.dart

@@ -4,6 +4,7 @@ import 'package:core/core.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/ads/ad_service.dart';
+import 'package:flutter_news_app_mobile_client_full_source_code/ads/interstitial_ad_manager.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/ads/models/ad_placeholder.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/ads/models/ad_theme_style.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/ads/widgets/feed_ad_loader_widget.dart';
@@ -324,29 +325,44 @@ class _EntityDetailsViewState extends State<EntityDetailsView> {
                           case HeadlineImageStyle.hidden:
                             tile = HeadlineTileTextOnly(
                               headline: item,
-                              onHeadlineTap: () => context.pushNamed(
-                                Routes.globalArticleDetailsName,
-                                pathParameters: {'id': item.id},
-                                extra: item,
-                              ),
+                              onHeadlineTap: () {
+                                context
+                                    .read<InterstitialAdManager>()
+                                    .onPotentialAdTrigger(context: context);
+                                context.pushNamed(
+                                  Routes.globalArticleDetailsName,
+                                  pathParameters: {'id': item.id},
+                                  extra: item,
+                                );
+                              },
                             );
                           case HeadlineImageStyle.smallThumbnail:
                             tile = HeadlineTileImageStart(
                               headline: item,
-                              onHeadlineTap: () => context.pushNamed(
-                                Routes.globalArticleDetailsName,
-                                pathParameters: {'id': item.id},
-                                extra: item,
-                              ),
+                              onHeadlineTap: () {
+                                context
+                                    .read<InterstitialAdManager>()
+                                    .onPotentialAdTrigger(context: context);
+                                context.pushNamed(
+                                  Routes.globalArticleDetailsName,
+                                  pathParameters: {'id': item.id},
+                                  extra: item,
+                                );
+                              },
                             );
                           case HeadlineImageStyle.largeThumbnail:
                             tile = HeadlineTileImageTop(
                               headline: item,
-                              onHeadlineTap: () => context.pushNamed(
-                                Routes.globalArticleDetailsName,
-                                pathParameters: {'id': item.id},
-                                extra: item,
-                              ),
+                              onHeadlineTap: () {
+                                context
+                                    .read<InterstitialAdManager>()
+                                    .onPotentialAdTrigger(context: context);
+                                context.pushNamed(
+                                  Routes.globalArticleDetailsName,
+                                  pathParameters: {'id': item.id},
+                                  extra: item,
+                                );
+                              },
                             );
                         }
                         return tile;