fix(users): pass mobile rule as a nested closure Filament can evaluate

Filament evaluates each entry of ->rules() as its own closure and tries
to inject dependencies, so a bare Laravel validation closure blew up with
"[$attribute] was unresolvable" when opening/saving the user form. Wrap it
so the outer closure returns the Laravel rule.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/Filament/Resources/Users/Schemas/UserForm.php

@@ -28,11 +28,13 @@ class UserForm
                     ->tel()
                     ->helperText('مثال درست: 09123456789')
                     ->dehydrateStateUsing(fn (?string $state): ?string => Mobile::normalize($state))
-                    ->rules([static function (string $attribute, mixed $value, \Closure $fail): void {
-                        if (filled($value) && ! preg_match(Mobile::REGEX, (string) Mobile::normalize((string) $value))) {
-                            $fail('فرمت شماره موبایل صحیح نیست. مثال درست: 09123456789');
-                        }
-                    }])
+                    ->rules([
+                        fn (): \Closure => function (string $attribute, mixed $value, \Closure $fail): void {
+                            if (filled($value) && ! preg_match(Mobile::REGEX, (string) Mobile::normalize((string) $value))) {
+                                $fail('فرمت شماره موبایل صحیح نیست. مثال درست: 09123456789');
+                            }
+                        },
+                    ])
                     ->unique(ignoreRecord: true)
                     ->maxLength(20),
                 TextInput::make('password')