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>

.claude/settings.local.json

@@ -0,0 +1,19 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(git commit:*)",
+      "Bash(git checkout:*)",
+      "Bash(mkdir:*)",
+      "Bash(npm install)",
+      "Bash(nvm use:*)",
+      "Bash(npm run dev:*)",
+      "Bash(npm run build:*)",
+      "Bash(npm run preview:*)",
+      "Bash(pkill:*)",
+      "Bash(npx serve:*)",
+      "Bash(python3:*)",
+      "Bash(git add:*)"
+    ],
+    "deny": []
+  }
+}