fix: unable to get latest workspaces on desktop

frontend/appflowy_flutter/lib/workspace/application/user/user_workspace_bloc.dart

@@ -55,6 +55,16 @@ class UserWorkspaceBloc extends Bloc<UserWorkspaceEvent, UserWorkspaceState> {
           fetchWorkspaces: () async {
             final result = await _fetchWorkspaces();
             if (result != null) {
+              final currentWorkspace = result.$1;
+              final workspaces = result.$2;
+              // the equal function has been overridden.
+              if (_deepCollectionEquality.equals(
+                    workspaces,
+                    state.workspaces,
+                  ) &&
+                  currentWorkspace == state.currentWorkspace) {
+                return;
+              }
               emit(
                 state.copyWith(
                   currentWorkspace: result.$1,
@@ -255,8 +265,10 @@ class UserWorkspaceBloc extends Bloc<UserWorkspaceEvent, UserWorkspaceState> {
             );
           },
           updateWorkspaces: (workspaces) async {
-            if (!const DeepCollectionEquality()
-                .equals(workspaces.items, state.workspaces)) {
+            if (!_deepCollectionEquality.equals(
+              workspaces.items,
+              state.workspaces,
+            )) {
               emit(
                 state.copyWith(
                   workspaces: workspaces.items,
@@ -278,6 +290,8 @@ class UserWorkspaceBloc extends Bloc<UserWorkspaceEvent, UserWorkspaceState> {
   final UserProfilePB userProfile;
   final UserBackendService _userService;
   final UserListener _listener;
+  final DeepCollectionEquality _deepCollectionEquality =
+      const DeepCollectionEquality();
 
   Future<
       (

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

@@ -148,6 +148,11 @@ class _SidebarSwitchWorkspaceButtonState
       direction: PopoverDirection.bottomWithCenterAligned,
       offset: const Offset(0, 10),
       constraints: const BoxConstraints(maxWidth: 260, maxHeight: 600),
+      onOpen: () {
+        context.read<UserWorkspaceBloc>().add(
+              const UserWorkspaceEvent.fetchWorkspaces(),
+            );
+      },
       popupBuilder: (_) {
         return BlocProvider<UserWorkspaceBloc>.value(
           value: context.read<UserWorkspaceBloc>(),

frontend/appflowy_flutter/packages/appflowy_popover/lib/src/popover.dart

@@ -1,8 +1,7 @@
+import 'package:appflowy_popover/src/layout.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
-import 'package:appflowy_popover/src/layout.dart';
-
 import 'mask.dart';
 import 'mutex.dart';
 
@@ -79,7 +78,8 @@ class Popover extends StatefulWidget {
   /// The direction of the popover
   final PopoverDirection direction;
 
-  final void Function()? onClose;
+  final VoidCallback? onOpen;
+  final VoidCallback? onClose;
   final Future<bool> Function()? canClose;
 
   final bool asBarrier;
@@ -109,6 +109,7 @@ class Popover extends StatefulWidget {
     this.direction = PopoverDirection.rightWithTopAligned,
     this.mutex,
     this.windowPadding,
+    this.onOpen,
     this.onClose,
     this.canClose,
     this.asBarrier = false,
@@ -228,6 +229,7 @@ class PopoverState extends State<Popover> {
       child: _buildClickHandler(
         widget.child,
         () {
+          widget.onOpen?.call();
           if (widget.triggerActions & PopoverTriggerFlags.click != 0) {
             showOverlay();
           }

frontend/appflowy_flutter/packages/flowy_infra_ui/lib/src/flowy_overlay/appflowy_popover.dart

@@ -1,7 +1,6 @@
-import 'package:flutter/material.dart';
-
 import 'package:appflowy_popover/appflowy_popover.dart';
 import 'package:flowy_infra_ui/style_widget/decoration.dart';
+import 'package:flutter/material.dart';
 
 class AppFlowyPopover extends StatelessWidget {
   final Widget child;
@@ -10,7 +9,8 @@ class AppFlowyPopover extends StatelessWidget {
   final PopoverDirection direction;
   final int triggerActions;
   final BoxConstraints constraints;
-  final void Function()? onClose;
+  final VoidCallback? onOpen;
+  final VoidCallback? onClose;
   final Future<bool> Function()? canClose;
   final PopoverMutex? mutex;
   final Offset? offset;
@@ -35,6 +35,7 @@ class AppFlowyPopover extends StatelessWidget {
     required this.child,
     required this.popupBuilder,
     this.direction = PopoverDirection.rightWithTopAligned,
+    this.onOpen,
     this.onClose,
     this.canClose,
     this.constraints = const BoxConstraints(maxWidth: 240, maxHeight: 600),
@@ -54,6 +55,7 @@ class AppFlowyPopover extends StatelessWidget {
   Widget build(BuildContext context) {
     return Popover(
       controller: controller,
+      onOpen: onOpen,
       onClose: onClose,
       canClose: canClose,
       direction: direction,