improve tabbar dismiss logic; fix #157

app/lib/features/geckoview/features/browser/presentation/controllers/tab_bar_dismissable.dart

@@ -21,7 +21,7 @@ import 'package:riverpod_annotation/riverpod_annotation.dart';
 
 part 'tab_bar_dismissable.g.dart';
 
-@Riverpod()
+@Riverpod(keepAlive: true)
 class TabBarDismissableController extends _$TabBarDismissableController {
   void show() {
     state = false;

app/lib/features/geckoview/features/browser/presentation/controllers/tab_bar_dismissable.g.dart

@@ -21,7 +21,7 @@ final class TabBarDismissableControllerProvider
         argument: null,
         retry: null,
         name: r'tabBarDismissableControllerProvider',
-        isAutoDispose: true,
+        isAutoDispose: false,
         dependencies: null,
         $allTransitiveDependencies: null,
       );
@@ -43,7 +43,7 @@ final class TabBarDismissableControllerProvider
 }
 
 String _$tabBarDismissableControllerHash() =>
-    r'2bb0055f5525a21982ba3d7cb6443bcad823b64f';
+    r'e0c2f700ccebc35bc8029370cdebd63e98bf95e1';
 
 abstract class _$TabBarDismissableController extends $Notifier<bool> {
   bool build();

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

@@ -211,6 +211,11 @@ class _TabBar extends HookConsumerWidget {
         if (!ref.read(generalSettingsWithDefaultsProvider).autoHideTabBar) {
           return;
         }
+        // Don't apply auto-hide when toolbar is manually dismissed
+        if (ref.read(tabBarDismissableControllerProvider)) {
+          return;
+        }
+
         final diff = event.dy;
         if (diff < 0) {
           if (diffAcc.value > 0) {

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

@@ -18,7 +18,10 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+import 'dart:async';
+
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
 import 'package:flutter_mozilla_components/flutter_mozilla_components.dart';
@@ -211,8 +214,6 @@ class BrowserTabBar extends HookConsumerWidget {
 
     final dragStartPosition = useRef(Offset.zero);
 
-    final toolbarHeight = useMemoized(() => getToolbarHeight());
-
     return GestureDetector(
       // Tap handling moved to AppBarTitle for split icon/title behavior
       onHorizontalDragStart: (details) {
@@ -245,19 +246,27 @@ class BrowserTabBar extends HookConsumerWidget {
                 }
             }
           }
-        } else if (distance.dx.abs() < 15) {
-          // Swipe direction for dismiss depends on toolbar position:
-          // - Bottom bar: swipe down to dismiss (distance.dy negative or small positive)
-          // - Top bar: swipe up to dismiss (distance.dy positive or small negative)
-          final dismissThreshold = toolbarHeight * 0.75;
-          final shouldDismiss = switch (tabBarPosition) {
-            TabBarPosition.bottom => distance.dy < dismissThreshold,
-            TabBarPosition.top => distance.dy > -dismissThreshold,
-          };
-          if (shouldDismiss &&
-              ref.read(bottomSheetControllerProvider) == null) {
-            ref.read(tabBarDismissableControllerProvider.notifier).dismiss();
-          }
+        }
+      },
+      onVerticalDragStart: (details) {
+        dragStartPosition.value = details.globalPosition;
+      },
+      onVerticalDragEnd: (details) {
+        final distance = dragStartPosition.value - details.globalPosition;
+
+        // Swipe direction for dismiss depends on toolbar position:
+        // - Bottom bar: swipe down to dismiss (positive distance.dy)
+        // - Top bar: swipe up to dismiss (negative distance.dy)
+        const dismissThreshold = kToolbarHeight * 0.5;
+        final shouldDismiss = switch (tabBarPosition) {
+          TabBarPosition.bottom =>
+            distance.dy.isNegative && distance.dy.abs() > dismissThreshold,
+          TabBarPosition.top =>
+            !distance.dy.isNegative && distance.dy.abs() > dismissThreshold,
+        };
+        if (shouldDismiss && ref.read(bottomSheetControllerProvider) == null) {
+          unawaited(HapticFeedback.lightImpact());
+          ref.read(tabBarDismissableControllerProvider.notifier).dismiss();
         }
       },
       child: Column(