fix: update 302.AI banners in README files and remove old images

README.md

@@ -4,11 +4,6 @@
   <img src="https://github.com/user-attachments/assets/83bdcc07-ae5e-4954-a53a-ac151ba6ccf3" width="1000" alt="icon"/>
 </a>
 
-<a href='https://302.ai/'>
-  <img src="./docs/images/302AI-banner-en.jpg" width=400 alt="icon"/>
-</a>
-
-[302.AI](https://302.ai/) is a pay-as-you-go AI application platform that offers the most comprehensive AI APIs and online applications available.
 
 
 <h1 align="center">NextChat</h1>
@@ -40,10 +35,19 @@ English / [简体中文](./README_CN.md)
 
 [<img src="https://zeabur.com/button.svg" alt="Deploy on Zeabur" height="30">](https://zeabur.com/templates/ZBUEFA) [<img src="https://vercel.com/button" alt="Deploy on Vercel" height="30">](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2FChatGPTNextWeb%2FChatGPT-Next-Web&env=OPENAI_API_KEY&env=CODE&project-name=nextchat&repository-name=NextChat)  [<img src="https://gitpod.io/button/open-in-gitpod.svg" alt="Open in Gitpod" height="30">](https://gitpod.io/#https://github.com/ChatGPTNextWeb/NextChat) 
 
+
 [<img src="https://github.com/user-attachments/assets/903482d4-3e87-4134-9af1-f2588fa90659" height="50" width="" >](https://monica.im/?utm=nxcrp)
 
 </div>
 
+## Sponsor AI API 
+<a href='https://302.ai/'>
+  <img src="https://github.com/user-attachments/assets/a03edf82-2031-4f23-bdb8-bfc0bfd168a4" width="100%" alt="icon"/>
+</a>
+
+[302.AI](https://302.ai/) is a pay-as-you-go AI application platform that offers the most comprehensive AI APIs and online applications available.
+
+
 ## 🥳 Cheer for NextChat iOS Version Online!
 > [👉 Click Here to Install Now](https://apps.apple.com/us/app/nextchat-ai/id6743085599)
 

README_CN.md

@@ -5,7 +5,7 @@
 </a>
 
 <a href='https://302.ai/'>
-  <img src="./docs/images/302AI-banner-zh.jpg" width=400 alt="icon"/>
+  <img src="https://github.com/user-attachments/assets/d8c0c513-1e18-4d3b-a2a9-ff3696aec0d4" width=400 alt="icon"/>
 </a>
 
 [302.AI](https://302.ai/) 是一个按需付费的AI应用平台，提供市面上最全的AI API和AI在线应用。

README_JA.md

@@ -2,7 +2,7 @@
 <img src="./docs/images/ent.svg" alt="プレビュー"/>
 
 <a href='https://302.ai/'>
-  <img src="./docs/images/302AI-banner-jp.jpg" width=400 alt="icon"/>
+  <img src="https://github.com/user-attachments/assets/6cf24233-1010-43e0-9a83-a11159866175" width=400 alt="icon"/>
 </a>
 
 [302.AI](https://302.ai/) は、オンデマンドで支払うAIアプリケーションプラットフォームで、最も安全なAI APIとAIオンラインアプリケーションを提供します。