chore: initial commit

- Wails v2 + Go 1.21+ + Vue 3 dark UI
- 3 buttons: Check env (auto-install dsh) / Start dsh web / Stop
- 升级 / 检查版本 一键按钮
- 启动后窗口自动最小化到 Dock
- 顶部 logo 鼠标 hover 显示大图预览
- scripts/: build-mac.sh, build-windows.bat, install-app.sh
- ui-design/: 视觉设计稿 (HTML + tokens)

frontend/README.md

@@ -0,0 +1,8 @@
+# Vue 3 + Vite
+
+This template should help get you started developing with Vue 3 in Vite. The template uses Vue 3 `<script setup>` SFCs,
+check out the [script setup docs](https://v3.vuejs.org/api/sfc-script-setup.html#sfc-script-setup) to learn more.
+
+## Recommended IDE Setup
+
+- [VS Code](https://code.visualstudio.com/) + [Volar](https://marketplace.visualstudio.com/items?itemName=Vue.volar)