more fixes

app/Http/Controllers/Auth/SetupUsernameController.php

@@ -35,7 +35,7 @@ class SetupUsernameController extends Controller
         ], [
             'username.required' => 'Please choose a username to continue.',
             'username.unique' => 'This username is already taken.',
-            'username.regex' => 'Use only letters, numbers, underscores, or hyphens.',
+            'username.regex' => 'Use only letters, numbers, and underscores.',
             'username.min' => 'Username must be at least 3 characters.',
             'username.max' => 'Username must be at most 20 characters.',
         ]);
@@ -86,6 +86,7 @@ class SetupUsernameController extends Controller
                 'username' => strtolower($candidate),
                 'onboarding_step' => 'complete',
                 'username_changed_at' => now(),
+                'last_username_change_at' => now(),
             ])->save();
         });