tests: add frontend tests

frontend/spa/vitest.config.js

@@ -0,0 +1,32 @@
+import { defineConfig } from 'vitest/config';
+import vue from '@vitejs/plugin-vue';
+import { fileURLToPath, URL } from 'node:url';
+import tailwindcss from '@tailwindcss/vite';
+
+export default defineConfig({
+  plugins: [
+    tailwindcss(),
+    vue(),
+  ],
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: ['./tests/setup.js'],
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'html'],
+      exclude: [
+        'node_modules/',
+        'tests/',
+        '*.config.js',
+        'dist/',
+      ],
+    },
+  },
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+    },
+  },
+});
+