refactored HTTP error handling and streamlined UI components by centralizing shared logic and removing redundant parameters

lib/state/app/infrastructure/data_loader/data_loader.dart

@@ -1,45 +0,0 @@
-import 'dart:convert';
-import 'dart:developer';
-
-import 'package:dio/dio.dart';
-
-abstract class DataLoader<TResult> {
-  final Dio dio;
-  DataLoader(this.dio) {
-    dio.options.connectTimeout = const Duration(seconds: 10);
-    dio.options.sendTimeout = const Duration(seconds: 30);
-    dio.options.receiveTimeout = const Duration(seconds: 30);
-  }
-
-  Future<TResult> run() async {
-    final response = await fetch();
-    try {
-      return assemble(
-        DataLoaderResult(
-          json: jsonDecode(response.data!),
-          headers: response.headers.map.map(
-            (key, value) => MapEntry(key, value.join(';')),
-          ),
-        ),
-      );
-    } catch (e, stack) {
-      log('DataLoader assemble failed', error: e, stackTrace: stack);
-      rethrow;
-    }
-  }
-
-  Future<Response<String>> fetch();
-  TResult assemble(DataLoaderResult data);
-}
-
-class DataLoaderResult {
-  final dynamic json;
-  final Map<String, String> headers;
-
-  Map<String, dynamic> asMap() => json as Map<String, dynamic>;
-  List<dynamic> asList() => json as List<dynamic>;
-  List<Map<String, dynamic>> asListOfMaps() =>
-      asList().map((e) => e as Map<String, dynamic>).toList();
-
-  DataLoaderResult({required this.json, required this.headers});
-}

lib/state/app/infrastructure/loadable_state/loadable_state.dart

@@ -19,12 +19,5 @@ abstract class LoadableState<TState> with _$LoadableState<TState> {
     String? statusText,
   }) = _LoadableState<TState>;
 
-  bool _hasError() => error != null;
-  bool _hasData() => data != null;
-
-  bool showPrimaryLoading() => isLoading && !_hasData();
-  bool showBackgroundLoading() => isLoading && _hasData();
-  bool showErrorBar() => _hasError() && _hasData();
-  bool showError() => _hasError() && !_hasData();
-  bool showContent() => _hasData();
+  bool showContent() => data != null;
 }