docs: README 末尾新增友情链接（dsh-tianshu-tui，双语同步）

README.md

@@ -247,3 +247,7 @@ pnpm watch        # tsdown --watch
 ## 🖥️ 平台支持
 
 Windows / Linux / macOS 三平台适配（macOS 日常验证；其余经单元测试覆盖）；`node-pty` 优先预编译二进制，失败需编译工具链（Windows VS Build Tools / Linux make+g+++python3 / macOS Xcode CLT）。
+
+## 🔗 友情链接
+
+- [dsh-tianshu-tui](https://github.com/huiliyi37/dsh-tianshu-tui)：DeepSeek Harness 交互式终端 UI 插件（渲染核心由自研 harness agent Tianshu-Tui 演进而来），在官方基础上增加 TDD 与证据门等工作流

README_EN.md

@@ -247,3 +247,7 @@ pnpm watch        # tsdown --watch
 ## 🖥️ Platform Support
 
 Windows / Linux / macOS (macOS validated daily; the rest covered by unit tests); `node-pty` prefers prebuilt binaries, otherwise a build toolchain is required (Windows VS Build Tools / Linux make+g+++python3 / macOS Xcode CLT).
+
+## 🔗 Friends
+
+- [dsh-tianshu-tui](https://github.com/huiliyi37/dsh-tianshu-tui): an interactive terminal UI plugin for DeepSeek Harness (its rendering core evolved from the self-developed harness agent Tianshu-Tui), adding TDD and evidence-gate workflows on top of the official harness