feat: scaffold TaskTracker.Web with Vite, React, TypeScript, Tailwind

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

TaskTracker.Web/src/App.tsx

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+function App() {
+  return <div className="bg-[#0f1117] min-h-screen text-white p-8">
+    <h1 className="text-2xl font-semibold">TaskTracker</h1>
+  </div>
+}
+export default App

TaskTracker.Web/src/index.css

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+@import "tailwindcss";

TaskTracker.Web/src/main.tsx

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+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)