refactor(feed): remove unnecessary type declarations

- Removed explicit type declarations
- Removed unused parameter

Author: fulleni

lib/headlines-feed/bloc/headlines_feed_bloc.dart

@@ -135,8 +135,8 @@ class HeadlinesFeedBloc extends Bloc<HeadlinesFeedEvent, HeadlinesFeedState> {
     Emitter<HeadlinesFeedState> emit,
   ) async {
     // Determine current filter and cursor based on state
-    HeadlineFilter currentFilter = const HeadlineFilter(); // Made type explicit
-    String? currentCursor = // Made type explicit
+    var currentFilter = const HeadlineFilter(); // Made type explicit
+    var currentCursor = // Made type explicit
         event.cursor; // Use event's cursor if provided (for pagination)
     var currentHeadlines = <Headline>[];
     var isPaginating = false;
@@ -217,7 +217,7 @@ class HeadlinesFeedBloc extends Bloc<HeadlinesFeedEvent, HeadlinesFeedState> {
     emit(HeadlinesFeedLoading()); // Show loading indicator for refresh
 
     // Determine the filter currently applied in the state
-    HeadlineFilter currentFilter = const HeadlineFilter(); // Made type explicit
+    var currentFilter = const HeadlineFilter(); // Made type explicit
     if (state is HeadlinesFeedLoaded) {
       currentFilter = (state as HeadlinesFeedLoaded).filter;
     }

lib/headlines-feed/view/source_filter_page.dart

@@ -117,9 +117,7 @@ class _SourceFilterView extends StatelessWidget {
             // User can then re-apply capsule filters if needed.
             // Or, we could try to persist/retrieve the last known good capsule state.
             // For now, simple retry reloads all.
-            const LoadSourceFilterData(
-              initialSelectedCountryIsoCodes: {},
-            ),
+            const LoadSourceFilterData(),
           );
         },
       );