Register unplugin-icons (Icons Vite plugin) in astro.config and add unplugin-icons + @iconify-json/mingcute to devDependencies. Replace inline SVGs in ThemeSwitcher.vue with MingcuteSunLine / MingcuteMoonLine icon components imported from ~icons, and add unplugin-icons types to tsconfig. Also simplify VSCode formatter setting and update package.json accordingly.
Add a new src/components/UserButton.vue and update src/components/Header.astro to integrate UI changes. Add @halo-dev/api-client and ky to package.json and update editor settings to use Prettier for .vue and .astro files. Regenerate pnpm lockfile.
Delete prebuilt template pages and their compiled theme assets under templates/: removes templates/*.html and the templates/assets files (Layout CSS, ThemeSwitcher, client runtime and bundled runtime). Cleans up generated/compiled template artifacts so they no longer ship with the repository.