chore: adjust ui color

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/header/field_cell.dart

@@ -85,7 +85,8 @@ class _GridHeaderCellContainer extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = context.watch<AppTheme>();
-    final borderSide = BorderSide(color: theme.shader4, width: 0.4);
+    final borderSide = BorderSide(color: theme.shader5, width: 1.0);
+
     final decoration = BoxDecoration(
         border: Border(
       top: borderSide,
@@ -126,7 +127,7 @@ class _DragToExpandLine extends StatelessWidget {
             borderRadius: BorderRadius.zero,
             contentMargin: const EdgeInsets.only(left: 6),
           ),
-          child: const SizedBox(width: 2),
+          child: const SizedBox(width: 4),
         ),
       ),
     );

frontend/app_flowy/packages/flowy_infra_ui/lib/style_widget/button.dart

@@ -1,4 +1,3 @@
-import 'package:flowy_infra/size.dart';
 import 'package:flowy_infra_ui/style_widget/hover.dart';
 import 'package:flowy_infra_ui/style_widget/text.dart';
 import 'package:flowy_infra_ui/widget/spacing.dart';
@@ -28,7 +27,7 @@ class FlowyButton extends StatelessWidget {
     return InkWell(
       onTap: onTap,
       child: FlowyHover(
-        style: HoverStyle(borderRadius: Corners.s6Border, hoverColor: hoverColor),
+        style: HoverStyle(borderRadius: BorderRadius.zero, hoverColor: hoverColor),
         setSelected: () => isSelected,
         builder: (context, onHover) => _render(),
       ),