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>

tailwind.config.js

@@ -0,0 +1,22 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./index.html",
+    "./src/**/*.{js,ts,jsx,tsx}",
+  ],
+  theme: {
+    extend: {
+      colors: {
+        primary: '#847e00',
+        secondary: '#008CCF',
+        accent: '#fff700',
+        dark: '#343434',
+        light: '#f1f1f1',
+      },
+      fontFamily: {
+        sans: ['"Helvetica Neue"', 'Helvetica', 'Arial', 'sans-serif'],
+      },
+    },
+  },
+  plugins: [],
+}