fix: TypeScript build errors in frontend pipeline

- Remove unused ReactNode import in useAuth.test.tsx
- Use vitest/config for defineConfig to recognize test property
- Add vitest/globals to tsconfig types for test runner globals

Frontend/src/hooks/__tests__/useAuth.test.tsx

@@ -1,7 +1,6 @@
 import { render, screen } from '@testing-library/react';
 import { AuthProvider } from '../useAuth';
 import { useAuth } from '../useAuth';
-import { ReactNode } from 'react';
 
 // Test component that uses useAuth hook
 const TestComponent = () => {

Frontend/tsconfig.app.json

@@ -5,7 +5,7 @@
     "useDefineForClassFields": true,
     "lib": ["ES2023", "DOM", "DOM.Iterable"],
     "module": "ESNext",
-    "types": ["vite/client"],
+    "types": ["vite/client", "vitest/globals"],
     "skipLibCheck": true,
 
     /* Bundler mode */

Frontend/vite.config.ts

@@ -1,4 +1,4 @@
-import { defineConfig } from 'vite'
+import { defineConfig } from 'vitest/config'
 import react from '@vitejs/plugin-react'
 import tailwindcss from '@tailwindcss/vite'