update routes; small polishments

app/lib/features/search_browser/presentation/screens/browser.dart

@@ -138,7 +138,7 @@ class KagiScreen extends HookConsumerWidget {
                 const Divider(),
                 MenuItemButton(
                   onPressed: () async {
-                    await context.push(BangRoute().location);
+                    await context.push(BangCategoriesRoute().location);
                   },
                   leadingIcon: const Icon(MdiIcons.exclamationThick),
                   child: const Text('Bangs'),

app/lib/features/search_browser/presentation/widgets/app_bar_title.dart

@@ -37,7 +37,7 @@ class AppBarTitle extends HookConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final activeWebView = ref.watch(webViewTabControllerProvider);
     if (activeWebView == null) {
-      return SizedBox.shrink();
+      return const SizedBox.shrink();
     }
 
     final page = useValueListenable(activeWebView.page);

app/lib/features/search_browser/presentation/widgets/tabs/summarize_tab.dart

@@ -18,7 +18,7 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 class _InputField extends ConsumerWidget {
   final TextEditingController? controller;
 
-  const _InputField({required this.controller, super.key});
+  const _InputField({required this.controller});
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {