complete story 5.1 with qa tests

app/Models/Post.php

@@ -5,6 +5,7 @@ namespace App\Models;
 use App\Enums\PostStatus;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Str;
 
 class Post extends Model
 {
@@ -62,4 +63,12 @@ class Post extends Model
 
         return $this->body[$locale] ?? $this->body['ar'] ?? '';
     }
+
+    /**
+     * Get the excerpt by stripping HTML and limiting to 150 characters.
+     */
+    public function getExcerpt(?string $locale = null): string
+    {
+        return Str::limit(strip_tags($this->getBody($locale)), 150);
+    }
 }