test: move component tests to __tests__ directory

client/vitest.config.ts

@@ -0,0 +1,19 @@
+/// <reference types="vitest" />
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import path from 'path'
+
+export default defineConfig({
+  plugins: [react()],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+  test: {
+    environment: 'jsdom',
+    globals: true,
+    setupFiles: ['./src/__tests__/setup/setup.ts'],
+    include: ['src/__tests__/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
+  },
+})