add const constructors

app/lib/features/geckoview/features/browser/presentation/widgets/browser_modules/bottom_app_bar.dart

@@ -256,7 +256,7 @@ class BrowserTabBar extends HookConsumerWidget {
             Visibility(
               visible: displayQuickTabSwitcher,
               maintainState: true,
-              child: QuickTabSwitcher(),
+              child: const QuickTabSwitcher(),
             ),
           if (showMainToolbar)
             Visibility(
@@ -426,7 +426,7 @@ class ContextualToolbar extends HookConsumerWidget {
           NavigateForwardButton(selectedTabId: selectedTabId)
         else
           ShareMenuButton(selectedTabId: selectedTabId),
-        AddTabButton(),
+        const AddTabButton(),
         TabsCountButton(
           selectedTabId: selectedTabId,
           displayedSheet: displayedSheet,
@@ -442,6 +442,8 @@ class ContextualToolbar extends HookConsumerWidget {
 }
 
 class QuickTabSwitcher extends HookConsumerWidget {
+  const QuickTabSwitcher();
+
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final tabStates = ref.watch(fifoTabStatesProvider);
@@ -962,6 +964,8 @@ class NavigateBackButton extends HookConsumerWidget {
 }
 
 class AddTabButton extends HookConsumerWidget {
+  const AddTabButton();
+
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final tabMenuController = useMenuController();

app/lib/features/geckoview/features/browser/presentation/widgets/certificate_tile.dart

@@ -25,6 +25,8 @@ import 'package:skeletonizer/skeletonizer.dart';
 import 'package:weblibre/features/geckoview/domain/providers/tab_state.dart';
 
 class CertificateTile extends HookConsumerWidget {
+  const CertificateTile();
+
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final tabState = ref.watch(selectedTabStateProvider);

app/lib/features/geckoview/features/browser/presentation/widgets/sheets/view_tab.dart

@@ -181,7 +181,7 @@ class ViewTabSheetWidget extends HookConsumerWidget {
                     child: WebsiteTitleTile(initialTabState),
                   ),
                 ),
-                CertificateTile(),
+                const CertificateTile(),
                 const Divider(),
               ],
             ),