improve ui

lib/components/appbar.dart

@@ -296,7 +296,7 @@ class _FilledTabBarState extends State<FilledTabBar> {
       padding: tabPadding,
       radius: tabRadius,
     );
-    if (old != null) {
+    if (old != null && old.offsets != null && old.itemHeight != null) {
       painter!.update(old.offsets!, old.itemHeight!);
     }
   }

lib/components/message.dart

@@ -262,6 +262,8 @@ class ContentDialog extends StatelessWidget {
       insetPadding: context.width < 400
           ? const EdgeInsets.symmetric(horizontal: 4)
           : const EdgeInsets.symmetric(horizontal: 16),
+      elevation: 2,
+      shadowColor: context.colorScheme.shadow,
       child: IntrinsicWidth(
         child: ConstrainedBox(
           constraints: BoxConstraints(

lib/components/navigation_bar.dart

@@ -127,15 +127,15 @@ class _NaviPaneState extends State<NaviPane>
       }
       if (target == 1) {
         StateController.find<NaviPaddingWidgetController>()
-            .setWithPadding(true, true);
+            .setWithPadding(true, true, true);
         controller.value = target;
       } else if (controller.value == 1 && target == 0) {
         StateController.findOrNull<NaviPaddingWidgetController>()
-            ?.setWithPadding(false, false);
+            ?.setWithPadding(false, false, false);
         controller.value = target;
       } else {
         StateController.findOrNull<NaviPaddingWidgetController>()
-            ?.setWithPadding(true, false);
+            ?.setWithPadding(true, false, false);
         controller.animateTo(target);
       }
       animationTarget = target;
@@ -660,9 +660,13 @@ class NaviPaddingWidgetController extends StateController {
 
   bool _withTopBarPadding = false;
 
-  void setWithPadding(bool withPadding, bool withAppbarPadding) {
+  bool _withBottomBarPadding = false;
+
+  void setWithPadding(
+      bool withPadding, bool withAppbarPadding, bool withBottomBarPadding) {
     _withPadding = withPadding;
     _withTopBarPadding = withAppbarPadding;
+    _withBottomBarPadding = withBottomBarPadding;
     update();
   }
 }
@@ -683,8 +687,10 @@ class NaviPaddingWidget extends StatelessWidget {
                       (controller._withTopBarPadding
                           ? _NaviPaneState._kTopBarHeight
                           : 0),
-                  bottom:
-                      _NaviPaneState._kBottomBarHeight + context.padding.bottom,
+                  bottom: context.padding.bottom +
+                      (controller._withBottomBarPadding
+                          ? _NaviPaneState._kBottomBarHeight
+                          : 0),
                 )
               : EdgeInsets.zero,
           child: child,

lib/components/scroll.dart

@@ -55,7 +55,7 @@ class _SmoothScrollProviderState extends State<SmoothScrollProvider> {
       return widget.builder(
         context,
         _controller,
-        const ClampingScrollPhysics(),
+        const BouncingScrollPhysics(),
       );
     }
     return Listener(
@@ -93,7 +93,7 @@ class _SmoothScrollProviderState extends State<SmoothScrollProvider> {
         _controller,
         _isMouseScroll
             ? const NeverScrollableScrollPhysics()
-            : const ClampingScrollPhysics(),
+            : const BouncingScrollPhysics(),
       ),
     );
   }