Enable test cases for both apps

frontend/src/App.test.jsx

@@ -0,0 +1,16 @@
+import { describe, it, expect } from 'vitest'
+import { render, screen } from '@testing-library/react'
+import App from './App.jsx'
+
+describe('App', () => {
+  it('renders the app header', () => {
+    render(<App />)
+    expect(screen.getByText(/FarmaFinder/i)).toBeInTheDocument()
+  })
+
+  it('renders the view switcher', () => {
+    render(<App />)
+    expect(screen.getByText(/Public Search/i)).toBeInTheDocument()
+    expect(screen.getByText(/Admin Panel/i)).toBeInTheDocument()
+  })
+})

frontend/src/test/setup.js

@@ -0,0 +1 @@
+import '@testing-library/jest-dom'