messages implemented

app/Policies/ArtworkCommentPolicy.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Policies;
+
+use App\Models\ArtworkComment;
+use App\Models\User;
+
+class ArtworkCommentPolicy
+{
+    /**
+     * Users can update their own comments.
+     */
+    public function update(User $user, ArtworkComment $comment): bool
+    {
+        return $user->id === (int) $comment->user_id;
+    }
+
+    /**
+     * Users can delete their own comments; admins can delete any comment.
+     */
+    public function delete(User $user, ArtworkComment $comment): bool
+    {
+        return $user->id === (int) $comment->user_id || $user->is_admin;
+    }
+}