feat: Setup React Frontend (Issue #1)

- Initialize Vite + React + TypeScript project
- Install dependencies (React Router, Zustand, Axios, Tailwind CSS)
- Configure Tailwind CSS and PostCSS
- Create basic folder structure
- Setup ESLint and Prettier
- Create placeholder pages (Login, Dashboard, Logs, Alerts, etc.)
- Create Layout and ProtectedRoute components
- Add TypeScript types

Closes #1

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

frontend/tsconfig.node.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}