feat: add previous configuration handling for user selections in quotes

- Implemented session storage management for the last configuration choices made by the user.
- Added functionality to prompt users when changing models to retain their previous selections.
- Introduced methods to apply previous choices to the newly loaded model, including finishes, handles, glass types, and options.
- Enhanced user experience by ensuring selections are automatically applied where applicable.

backoffice/app/Support/Configuratore/Media.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Support\Configuratore;
+
+/**
+ * URL pubblici delle immagini del configuratore. Passano dalla rotta API `media` (e non
+ * da /storage) perché le texture caricate da Three.js richiedono gli header CORS.
+ */
+class Media
+{
+    /** Cartelle del disco public servite dalla rotta media. */
+    public const CARTELLE = ['configuratore/', 'modelli/'];
+
+    public static function url(?string $percorso): ?string
+    {
+        return $percorso ? route('media', ['percorso' => $percorso]) : null;
+    }
+}