update

app/Services/Posts/PostAchievementService.php

@@ -2,6 +2,7 @@
 
 namespace App\Services\Posts;
 
+use App\Models\Achievement;
 use App\Models\Post;
 use App\Models\PostTarget;
 use App\Models\User;
@@ -67,6 +68,16 @@ class PostAchievementService
         ], $artworkId);
     }
 
+    public function achievementUnlocked(User $user, Achievement $achievement): void
+    {
+        $this->createAchievementPost($user, 'unlock_' . $achievement->slug, [
+            'achievement_id' => $achievement->id,
+            'achievement_name' => $achievement->name,
+            'message' => '🎉 Unlocked achievement: ' . $achievement->name,
+            'xp_reward' => (int) $achievement->xp_reward,
+        ]);
+    }
+
     // ─────────────────────────────────────────────────────────────────────────
 
     private function createAchievementPost(