Update Changelog

Author: ReturnFI

changelog

@@ -1,7 +1,18 @@
-### 🐛 **\[2.1.4] – API Response Model Fix**
+### 🚀 **\[2.2.0] – Bulk User Deletion & Performance Boost**
 
 *Released: 2025-09-13*
 
-#### 🐛 Fixes
+#### ⚡ Performance
 
-* Aligned **user detail API endpoint** with the expected response model for more consistent output
+* **Core:** Re-engineered user deletion with MongoDB `delete_many` for efficient batch operations
+* Resolved freeze issues in web panel & database during multi-user removals
+
+#### 🌐 API
+
+* ✨ Added `POST /api/v1/users/bulk-delete` for batch deletions
+* 🐛 Fixed single-user `DELETE` endpoint to align with new bulk logic
+
+#### 🖥️ Frontend
+
+* Optimized **Users page** to call bulk API when multiple users are selected
+* Significantly improved UI responsiveness under heavy load