fix(admin): add soft delete filter to backend admins

apps/workspaces/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from core.admins.base import BaseAdmin
+from core.admins.base import BaseAdmin, SoftDeleteListFilter
 from apps.workspaces.models import Workspace, WorkspaceMembership
 
 
@@ -26,10 +26,11 @@ class WorkspaceAdmin(BaseAdmin):
         "owner__mobile",
     )
 
-    list_filter = (
-        "created_at",
-        "updated_at",
-        "is_deleted",
+    list_filter = (
+        SoftDeleteListFilter,
+        "created_at",
+        "updated_at",
+        "is_deleted",
     )
 
     autocomplete_fields = ("owner",)
@@ -48,10 +49,11 @@ class WorkspaceMembershipAdmin(BaseAdmin):
         "created_at",
     )
 
-    list_filter = (
-        "role",
-        "is_active",
-        "is_deleted",
+    list_filter = (
+        SoftDeleteListFilter,
+        "role",
+        "is_active",
+        "is_deleted",
     )
 
     search_fields = (