feat: reload the page with a flash when an htmx request fails

config/packages/security.yaml

@@ -10,7 +10,8 @@ security:
 
     firewalls:
         dev:
-            pattern: ^/(_profiler|_wdt|assets)/
+            # _error is the dev-only preview of the error pages (/_error/404, /_error/500).
+            pattern: ^/(_profiler|_wdt|_error|assets)/
             security: false
         main:
             lazy: true