chore: update readme

EN_README.md

@@ -10,18 +10,11 @@
 [![Bilibili](https://img.shields.io/badge/Bilibili-Watch_Video-FB7299?logo=bilibili)](https://space.bilibili.com/527346837)
 ![QQ Group](https://img.shields.io/badge/QQ%20Group-1071821688-deepskyblue?logo=tencent-qq&logoColor=white)
 
-![Last Commit](https://img.shields.io/github/last-commit/4thfever/cultivation-world-simulator)
-![Commit Activity](https://img.shields.io/github/commit-activity/y/4thfever/cultivation-world-simulator)
-![Repo Size](https://img.shields.io/github/repo-size/4thfever/cultivation-world-simulator)
 [![License](https://img.shields.io/badge/license-CC%20BY--NC--SA%204.0-lightgrey)](LICENSE)
-[![codecov](https://codecov.io/gh/AI-Cultivation/cultivation-world-simulator/graph/badge.svg)](https://codecov.io/gh/AI-Cultivation/cultivation-world-simulator)
 
-![Status](https://img.shields.io/badge/Status-Alpha-tomato)
-![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)
 ![Genre: Xianxia](https://img.shields.io/badge/Genre-Xianxia-red)
 ![Powered by LLM](https://img.shields.io/badge/Powered%20by-LLM-0077B5)
 ![AI Agent](https://img.shields.io/badge/AI-Agent-orange)
-![OpenAI Compatible](https://img.shields.io/badge/OpenAI%20API-Compatible-412991)
 
 ![Python](https://img.shields.io/badge/Python-3.10%2B-blue?style=flat&logo=python&logoColor=white)
 ![FastAPI](https://img.shields.io/badge/FastAPI-005571?style=flat&logo=fastapi&logoColor=white)
@@ -249,7 +242,7 @@ For more details on contributions, please see [CONTRIBUTORS.md](CONTRIBUTORS.md)
 - ✅ Heaven-earth Qi fluctuations
 - [ ] World-scale events:
   - ✅ Auctions
-  - [ ] Secret realm exploration
+  - ✅ Hidden domain exploration
   - [ ] Martial tournaments
   - [ ] Sect grand competition
 - [ ] Sudden events