feat(desktop): 迁移启动页到 React 并接入 Motion 动画

apps/desktop/src/renderer/main.tsx

@@ -0,0 +1,11 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import { SplashApp } from './components/SplashApp'
+import './styles.css'
+
+// biome-ignore lint/style/noNonNullAssertion: 一定存在
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <SplashApp />
+  </StrictMode>,
+)