fix(models): improve user deletion logic in User model to handle team member roles and prevent deletion if user is alone in root team

app/Models/User.php

@@ -74,7 +74,7 @@ class User extends Authenticatable implements SendsEmail
         });
 
         static::deleting(function (User $user) {
-
+            \DB::transaction(function () use ($user) {
                 $teams = $user->teams;
                 foreach ($teams as $team) {
                     $user_alone_in_team = $team->members->count() === 1;
@@ -124,6 +124,7 @@ class User extends Authenticatable implements SendsEmail
                     }
                 }
             });
+        });
     }
 
     /**