feat: add storage_url helper function and update image URL retrieval to use public disk

app/Classes/helpers.php

@@ -31,3 +31,20 @@ if (!function_exists('hook')) {
         return \App\Helpers\EventHelper::renderEvent($event);
     }
 }
+
+if (!function_exists('storage_url')) {
+    /**
+     * Get the URL for a file stored on the public disk
+     *
+     * @param  string|null  $path
+     * @return string|null
+     */
+    function storage_url(?string $path): ?string
+    {
+        if (!$path) {
+            return null;
+        }
+        
+        return \Illuminate\Support\Facades\Storage::disk('public')->url($path);
+    }
+}