Fix mixed content: force HTTPS URL generation in production

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Providers/AppServiceProvider.php

@@ -2,23 +2,20 @@
 
 namespace App\Providers;
 
+use Illuminate\Support\Facades\URL;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
 {
-    /**
-     * Register any application services.
-     */
     public function register(): void
     {
         //
     }
 
-    /**
-     * Bootstrap any application services.
-     */
     public function boot(): void
     {
-        //
+        if (app()->environment('production')) {
+            URL::forceScheme('https');
+        }
     }
 }