Register Gate::before to wire PermissionService into Laravel authorization

Livewire components use $this->authorize() which goes through Laravel's
Gate system. Without a Gate callback, super_admin gets 403 because no
policies exist. Gate::before delegates all ability checks to our
PermissionService (which returns true for is_super_admin).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Providers/AppServiceProvider.php

@@ -4,6 +4,7 @@
 
 use App\Domain\Identity\Services\PermissionService;
 use Illuminate\Support\Facades\Blade;
+use Illuminate\Support\Facades\Gate;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -21,6 +22,10 @@ public function register(): void
      */
     public function boot(): void
     {
+        Gate::before(function ($user, $ability) {
+            return app(PermissionService::class)->can($user, $ability) ?: null;
+        });
+
         Blade::if('permission', function (string $permission) {
             $user = auth()->user();
             if (!$user) {