Update language labels and DartNode badge in READMEs

Standardized the Traditional Chinese label to '漢語（繁體）' across all README files. Moved the DartNode badge from the Chinese READMEs to the English README.

README.zh-Hans.md

@@ -20,7 +20,7 @@
 [![Docker](https://img.shields.io/badge/Docker-2496ED?&logo=docker&logoColor=white)](#自托管部署)
 [![Podman](https://img.shields.io/badge/Podman-892CA0?&logo=podman&logoColor=white)](#自托管部署)
 
-[English](README.md) | **汉语（简体）** | [汉语（繁体）](README.zh-Hant.md)
+[English](README.md) | **汉语（简体）** | [漢語（繁體）](README.zh-Hant.md)
 
 </div>
 
@@ -2728,5 +2728,3 @@ npx wrangler dev --log-level debug
 Made with ❤️ by [Xi Xu](https://xi-xu.me)
 
 </div>
-
-[![Powered by DartNode](https://dartnode.com/branding/DN-Open-Source-sm.png)](https://dartnode.com "Powered by DartNode - Free VPS for Open Source")