Migrate from Vue2 to React with modern tech stack

- Replace Vue2 + Vue CLI with Vite + React 18 + TypeScript
- Add Tailwind CSS for efficient styling
- Implement clean component architecture:
  - Split 1000+ line Vue component into focused React components
  - Add proper type safety with TypeScript
  - Use React Query for efficient data fetching
- Update GitHub Actions for React build pipeline
- Maintain existing functionality and design
- Support Node.js 23 with .nvmrc

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vite.config.ts

@@ -0,0 +1,24 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+export default defineConfig({
+  plugins: [react()],
+  build: {
+    outDir: 'dist',
+  },
+  server: {
+    port: 8080,
+    proxy: {
+      '/api': {
+        target: 'https://api.syui.ai',
+        changeOrigin: true,
+        rewrite: (path) => path.replace(/^\/api/, '')
+      }
+    }
+  },
+  preview: {
+    port: 4173,
+    host: true,
+    https: false
+  }
+})