sequenceDiagram
    participant Admin as Admin Web
    participant API as Widget API
    participant DB as DynamoDB
    
    Admin->>API: DELETE /admin/sites/{site_id}<br/>Bearer Token
    API->>API: Verify JWT token
    API->>DB: Delete item từ sites table<br/>(site_id)
    DB-->>API: Success
    
    API->>DB: Query reviews table<br/>(site_id)
    DB-->>API: Reviews list
    API->>DB: Batch delete reviews<br/>(site_id, review_id)
    
    API->>DB: Query widget_setting table<br/>(GSI: SiteIdIndex, site_id)
    DB-->>API: Widgets list
    API->>DB: Batch delete widgets<br/>(id, type)
    
    API-->>Admin: Site deleted (204)