docs(sponsors): switch Kimi banner to CDN and update copy

- Replace local Kimi banner assets with Kimi-hosted CDN URLs
  (gcdn.moonshot.cn/growth-cdn/sponsor/kimi-en.png + kimi-zh.png)
  so Kimi can manage the banner centrally.
- Update sponsor copy from Kimi K2.7 Code to Kimi K3
  (Moonshot AI's 3T-class agentic model with native vision
  and 1M-token context).
- Delete now-orphan local banner files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -47,13 +47,13 @@
 <details open>
 <summary>Sponsors</summary>
 
-[![Kimi](assets/sponsors/kimi-banner-en.png)](https://www.kimi.com/code/?aff=cc-connect)
+[![Kimi](https://gcdn.moonshot.cn/growth-cdn/sponsor/kimi-en.png)](https://www.kimi.com/code/?aff=cc-connect)
 
-Thanks to [Kimi](https://www.kimi.com/code/?aff=cc-connect) for sponsoring this project! [Kimi K2.7 Code](https://platform.kimi.ai/docs/guide/kimi-k2-7-code-quickstart) is an open-source, coding-focused agentic model developed by Moonshot AI, delivering substantial gains on real-world long-horizon coding tasks and higher end-to-end success across complex software engineering workflows. It also reduces thinking-token usage by approximately 30% compared with K2.6.
+Thanks to [Kimi](https://www.kimi.com/code/?aff=cc-connect) for sponsoring this project! [Kimi K3](https://www.kimi.com/blog/kimi-k3) is Moonshot AI's most capable model and the world's first open 3T-class model. With 2.8 trillion parameters, native vision, and a 1-million-token context window, K3 delivers frontier performance across long-horizon coding, knowledge work, and reasoning.
 
-With cc-connect, you can bring Kimi CLI from your local machine into Feishu/Lark, DingTalk, Telegram, Slack, Discord, WeChat Work, and other instant messaging tools. Wherever you are, you can continue working on local projects through chat and ask Kimi to inspect or modify code, troubleshoot issues, run commands, and handle automation tasks.
+With cc-connect, you can bring Kimi CLI from your local machine into Feishu/Lark, DingTalk, Telegram, Slack, Discord, WeCom, and other instant messaging tools. Wherever you are, you can continue working on local projects through chat and ask Kimi to inspect or modify code, troubleshoot issues, run commands, and handle automation tasks.
 
-cc-connect already supports Kimi CLI. Try the cost-effective [Kimi Code subscription](https://www.kimi.com/code/?aff=cc-connect) or use the API through the Kimi Open Platform ([中文站](https://platform.kimi.com/?aff=cc-connect)｜[Global](https://platform.kimi.ai/?aff=cc-connect)).
+**cc-connect already supports Kimi CLI. Try the **[Kimi Code subscription](https://www.kimi.com/code/?aff=cc-connect)**, or use the API through the Kimi Open Platform ([中文站](https://platform.kimi.com/?aff=cc-connect) | [Global](https://platform.kimi.ai/?aff=cc-connect)).
 
 ---
 

README.zh-CN.md

@@ -47,13 +47,13 @@
 <details open>
 <summary>赞助商</summary>
 
-[![Kimi](assets/sponsors/kimi-banner-zh.png)](https://www.kimi.com/code/?aff=cc-connect)
+[![Kimi](https://gcdn.moonshot.cn/growth-cdn/sponsor/kimi-zh.png)](https://www.kimi.com/code/?aff=cc-connect)
 
-感谢 [Kimi](https://www.kimi.com/code/?aff=cc-connect) 赞助本项目！[Kimi K2.7 Code](https://platform.kimi.com/docs/guide/kimi-k2-7-code-quickstart) 是 Moonshot AI 推出的编程专用开源智能体模型，在真实长程编程与复杂软件工程工作流中显著提升端到端任务成功率，同时优化推理效率，相比 K2.6 平均减少约 30% 的推理 Token 消耗。
+感谢 [Kimi](https://www.kimi.com/code/?aff=cc-connect) 赞助本项目！[Kimi K3](https://www.kimi.com/blog/kimi-k3) 是 Moonshot AI 迄今能力最强的模型，也是全球首个开源 3T 级模型。K3 拥有 2.8T 参数、原生视觉能力与 100 万 Token 上下文，在长程编码、知识工作和推理任务中展现前沿性能。
 
-在 cc-connect 中，你可以直接接入 Kimi CLI，将运行在本地电脑上的 Kimi 连接到飞书、钉钉、Telegram、Slack、Discord、企业微信等即时通讯工具。无论身在何处，都能通过消息继续处理本地项目，让 Kimi 协助阅读和修改代码、排查问题、执行命令与自动化任务。
+通过 cc-connect，你可以将本地运行的 Kimi CLI 连接到飞书、钉钉、Telegram、Slack、Discord、企业微信等即时通讯工具，随时让 Kimi 阅读和修改代码、排查问题、执行命令与处理自动化任务。
 
-cc-connect 已支持 Kimi CLI。立即体验高性价比的 [Kimi Code 订阅](https://www.kimi.com/code/?aff=cc-connect)，或前往 Kimi 开放平台（[中文站](https://platform.kimi.com/?aff=cc-connect)｜[Global](https://platform.kimi.ai/?aff=cc-connect)）使用 API。
+**cc-connect 已支持 Kimi CLI。立即体验 **[Kimi Code 订阅](https://www.kimi.com/code/?aff=cc-connect)**，或前往 Kimi 开放平台（[中文站](https://platform.kimi.com/?aff=cc-connect)｜[Global](https://platform.kimi.ai/?aff=cc-connect)）使用 API。
 
 ---