Handle expired session errors gracefully

- Add custom response for 419 (CSRF token expiration) using exception handler.
- Update language files to include localized error messages for expired sessions.

app/application/bootstrap/app.php

@@ -4,6 +4,7 @@ use Illuminate\Foundation\Application;
 use Illuminate\Foundation\Configuration\Exceptions;
 use Illuminate\Foundation\Configuration\Middleware;
 use Illuminate\Support\Facades\Route;
+use Symfony\Component\HttpFoundation\Response;
 
 return Application::configure(basePath: dirname(__DIR__))
     ->withRouting(
@@ -19,8 +20,15 @@ return Application::configure(basePath: dirname(__DIR__))
         },
     )
     ->withMiddleware(function (Middleware $middleware) {
-        //
+
     })
     ->withExceptions(function (Exceptions $exceptions) {
-        //
+        $exceptions->respond(function (Response $response) {
+            if ($response->getStatusCode() === 419) {
+                return back()
+                    ->withInput()
+                    ->withErrors(['csrf' => __('http-statuses.csrfError')]);
+            }
+            return $response;
+        });
     })->create();