chore: optimize the workspace menu hover status (#5865)

frontend/appflowy_flutter/lib/workspace/presentation/home/menu/sidebar/space/sidebar_space_header.dart

@@ -141,7 +141,9 @@ class _SidebarSpaceHeaderState extends State<SidebarSpaceHeader> {
               onAction: _onAction,
             ),
             const HSpace(8.0),
-            ViewAddButton(
+            FlowyTooltip(
+              message: LocaleKeys.sideBar_addAPage.tr(),
+              child: ViewAddButton(
                 parentViewId: widget.space.id,
                 onEditing: (_) {},
                 onSelected: (
@@ -156,6 +158,7 @@ class _SidebarSpaceHeaderState extends State<SidebarSpaceHeader> {
                   }
                 },
               ),
+            ),
           ],
         ),
       ),

frontend/appflowy_flutter/lib/workspace/presentation/home/menu/sidebar/workspace/sidebar_workspace.dart

@@ -29,6 +29,15 @@ class SidebarWorkspace extends StatefulWidget {
 class _SidebarWorkspaceState extends State<SidebarWorkspace> {
   Loading? loadingIndicator;
 
+  final ValueNotifier<bool> onHover = ValueNotifier(false);
+
+  @override
+  void dispose() {
+    onHover.dispose();
+
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return BlocConsumer<UserWorkspaceBloc, UserWorkspaceState>(
@@ -40,7 +49,24 @@ class _SidebarWorkspaceState extends State<SidebarWorkspace> {
         if (currentWorkspace == null) {
           return const SizedBox.shrink();
         }
-        return Row(
+        return MouseRegion(
+          onEnter: (_) => onHover.value = true,
+          onExit: (_) => onHover.value = false,
+          child: ValueListenableBuilder(
+            valueListenable: onHover,
+            builder: (_, onHover, child) {
+              return Container(
+                margin: const EdgeInsets.only(right: 8.0),
+                decoration: BoxDecoration(
+                  borderRadius: BorderRadius.circular(8.0),
+                  color: onHover
+                      ? Theme.of(context).colorScheme.secondary
+                      : Colors.transparent,
+                ),
+                child: child,
+              );
+            },
+            child: Row(
               children: [
                 Expanded(
                   child: SidebarSwitchWorkspaceButton(
@@ -51,8 +77,10 @@ class _SidebarWorkspaceState extends State<SidebarWorkspace> {
                 UserSettingButton(userProfile: widget.userProfile),
                 const HSpace(8.0),
                 const NotificationButton(),
-            const HSpace(12.0),
+                const HSpace(4.0),
               ],
+            ),
+          ),
         );
       },
     );
@@ -201,6 +229,7 @@ class _SidebarSwitchWorkspaceButtonState
       },
       child: FlowyIconTextButton(
         margin: EdgeInsets.zero,
+        hoverColor: Colors.transparent,
         textBuilder: (onHover) => SizedBox(
           height: 30,
           child: Row(

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

@@ -268,8 +268,11 @@ class FlowyButton extends StatelessWidget {
     return Container(
       decoration: decoration,
       child: Padding(
-        padding:
+        padding: margin ??
-            margin ?? const EdgeInsets.symmetric(horizontal: 6, vertical: 4),
+            const EdgeInsets.symmetric(
+              horizontal: 6,
+              vertical: 4,
+            ),
         child: child,
       ),
     );