feat: establish native desktop update trust root

product-source/hololake-native-desktop/src/main.tsx

@@ -0,0 +1,24 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './styles.css'
+
+function FoundationScreen() {
+  return (
+    <main>
+      <p className="eyebrow">HoloLake Native Desktop</p>
+      <h1>新的光湖桌面主线正在建立信任根</h1>
+      <p>
+        当前只完成最小 Tauri 外壳与更新安全边界。知识工作区将在双供体审计和视觉方向确定后开始。
+      </p>
+      <dl>
+        <div><dt>上游更新</dt><dd>已关闭</dd></div>
+        <div><dt>光湖发布广播</dt><dd>等待正式端点与公钥</dd></div>
+        <div><dt>下载与安装</dt><dd>必须由人类选择</dd></div>
+      </dl>
+    </main>
+  )
+}
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode><FoundationScreen /></StrictMode>,
+)

product-source/hololake-native-desktop/src/styles.css

@@ -0,0 +1,16 @@
+:root {
+  font-family: ui-sans-serif, system-ui, sans-serif;
+  color: #eaf0ff;
+  background: #07101f;
+  font-synthesis: none;
+}
+
+body { margin: 0; min-width: 320px; min-height: 100vh; }
+main { max-width: 720px; margin: 0 auto; padding: 12vh 32px; }
+.eyebrow { color: #82a7ff; letter-spacing: .08em; text-transform: uppercase; }
+h1 { font-size: clamp(2rem, 5vw, 4rem); line-height: 1.05; }
+p { color: #b7c5e5; line-height: 1.7; }
+dl { margin-top: 48px; border-top: 1px solid #263554; }
+dl div { display: flex; justify-content: space-between; gap: 24px; padding: 16px 0; border-bottom: 1px solid #263554; }
+dt { color: #8fa4cf; }
+dd { margin: 0; text-align: right; }