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

app/Helpers/StorageHelper.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Helpers;
+
+use Illuminate\Support\Facades\Storage;
+
+class StorageHelper
+{
+    /**
+     * Get the URL for a file stored on the public disk
+     * 
+     * @param string|null $path
+     * @return string|null
+     */
+    public static function url(?string $path): ?string
+    {
+        if (!$path) {
+            return null;
+        }
+        
+        return Storage::disk('public')->url($path);
+    }
+}
+