- Persist country ISO codes
- Persist source types

- Remove _FetchFilteredSourcesRequested
- Filter in bloc using helper method
- Use initial capsule selections

- Pass data via state.extra
- Simplify SourceFilterPage init

- Pass map to source filter
- Handle map result from source filter

- Pass and return full filter state
- Retry reloads all sources/countries

- Clear filter on refresh event

- Added country ISO code filtering
- Added source type filtering
- Updated HeadlineFilter model

- Initialize source filters from BLoC state
- Pass filter states to HeadlinesFeedBloc

…ple selected category IDs and source IDs as comma-separated strings when making API requests. This aligns with the backend's expectation and should resolve the bug where new filter selections were overriding previous ones instead of being combined. Filtering by multiple categories and/or multiple sources simultaneously should now work as intended.

- Removed explicit type declarations
- Removed unused parameter

- Added top padding to column