docs(best-practices): update plugin showcase with marketplace and API reference screenshots

docs/best-practices.md

@@ -289,6 +289,10 @@ EdgeEver features an extension manager supporting one-click installation via Git
   - **AI RSS Feed Assistant ([EdgeEver AI RSS](https://github.com/tianma-if/edgeever-ai-rss))**: Automatically captures RSS/Atom feeds and uses AI to generate structured daily digest notes.
 - For complete API documentation and development workflows, refer to the [EdgeEver Plugin Development Guide](plugin-development.md).
 
-| 1. Extension & Plugin Management Center | 2. AI Digest Note Generated by Official AI RSS Plugin |
-| :---: | :---: |
-| ![EdgeEver plugin marketplace and official extension management](assets/best-practices/original-image/plugin/official-in.png) | ![Structured daily digest note generated by EdgeEver AI RSS plugin](assets/best-practices/original-image/plugin/ai-daily.png) |
+| 1. Extension & Plugin Management Center |
+| :---: |
+| ![EdgeEver plugin marketplace and official extension management](assets/best-practices/original-image/plugin/official-in.png) |
+
+| 2. Plugin API Namespaces & Documentation |
+| :---: |
+| ![EdgeEver plugin development API reference and documentation](assets/best-practices/original-image/plugin/plugin-api.png) |

docs/best-practices.zh-CN.md

@@ -289,6 +289,10 @@ EdgeEver 内置插件扩展管理，支持通过 GitHub 仓库或 Manifest 地
   - **AI RSS 订阅助手 ([EdgeEver AI RSS](https://github.com/tianma-if/edgeever-ai-rss))**：抓取订阅源并结合 AI 生成分类每日简报。
 - 更多规范与指南详见 [EdgeEver 插件开发指南](plugin-development.zh-CN.md)。
 
-| 1. 插件与主题管理中心 | 2. 官方 AI RSS 插件生成的日报笔记效果 |
-| :---: | :---: |
-| ![EdgeEver 插件市场与官方插件管理](assets/best-practices/original-image/plugin/official-in.png) | ![EdgeEver AI RSS 插件自动生成的结构化日报笔记](assets/best-practices/original-image/plugin/ai-daily.png) |
+| 1. 插件与主题管理中心 |
+| :---: |
+| ![EdgeEver 插件市场与官方插件管理](assets/best-practices/original-image/plugin/official-in.png) |
+
+| 2. 插件 API 体系与开发文档 |
+| :---: |
+| ![EdgeEver 插件开发 API 命名空间与规范文档](assets/best-practices/original-image/plugin/plugin-api.png) |