refactor(ads): improve FeedAdLoaderWidget ad loading process

- Remove redundant comments
- Extract AppBloc state properties for better readability
- Add userRole parameter to getFeedAd method call

Author: fulleni

lib/ads/widgets/feed_ad_loader_widget.dart

@@ -98,7 +98,7 @@ class _FeedAdLoaderWidgetState extends State<FeedAdLoaderWidget> {
       // completed. This prevents a race condition if a new load is triggered
       // while an old one is still in progress.
       if (_loadAdCompleter != null && !_loadAdCompleter!.isCompleted) {
-        _loadAdCompleter!.complete(); // Complete normally to prevent crashes
+        _loadAdCompleter!.complete();
       }
       _loadAdCompleter = null;
 
@@ -125,7 +125,7 @@ class _FeedAdLoaderWidgetState extends State<FeedAdLoaderWidget> {
     // This prevents `setState()` calls on a disposed widget.
     // Ensure the completer is not already completed before attempting to complete it.
     if (_loadAdCompleter != null && !_loadAdCompleter!.isCompleted) {
-      _loadAdCompleter!.complete(); // Complete normally to prevent crashes
+      _loadAdCompleter!.complete();
     }
     _loadAdCompleter = null;
     super.dispose();
@@ -203,18 +203,18 @@ class _FeedAdLoaderWidgetState extends State<FeedAdLoaderWidget> {
         return;
       }
 
-      // Get the current HeadlineImageStyle from AppBloc
-      final headlineImageStyle = context
-          .read<AppBloc>()
-          .state
-          .headlineImageStyle;
+      // Get the current HeadlineImageStyle and user role from AppBloc
+      final appBlocState = context.read<AppBloc>().state;
+      final headlineImageStyle = appBlocState.headlineImageStyle;
+      final userRole = appBlocState.user?.appRole ?? AppUserRole.guestUser;
 
       // Call AdService.getFeedAd with the full AdConfig and adType from the placeholder.
       final loadedAd = await _adService.getFeedAd(
-        adConfig: widget.adConfig, // Pass the full AdConfig
+        adConfig: widget.adConfig,
         adType: widget.adPlaceholder.adType,
         adThemeStyle: widget.adThemeStyle,
-        headlineImageStyle: headlineImageStyle, // Pass the headlineImageStyle
+        headlineImageStyle: headlineImageStyle,
+        userRole: userRole,
       );
 
       if (loadedAd != null) {