chore(monorepo/client): reintegrate tests

apps/client/package.json

@@ -20,7 +20,8 @@
   "type": "module",
   "main": "index.js",
   "scripts": {
-    "build:webpack": "tsx node_modules/webpack/bin/webpack.js -c webpack.config.ts"
+    "build:webpack": "tsx node_modules/webpack/bin/webpack.js -c webpack.config.ts",
+    "test": "vitest"
   },
   "devDependencies": {
     "@excalidraw/excalidraw": "0.18.0",
@@ -77,6 +78,7 @@
     "css-loader": "7.1.2",
     "postcss-loader": "8.1.1",  
     "eslint-linter-browserify": "9.24.0",    
-    "@eslint/js": "9.24.0"
+    "@eslint/js": "9.24.0",
+    "happy-dom": "17.4.4"
   }
 }

apps/client/vitest.config.ts

@@ -7,7 +7,7 @@ export default defineConfig({
             ...configDefaults.exclude,
             "build/**",
         ],
-        setupFiles: ["./test/setup.ts"],
+        setupFiles: ["./spec/setup.ts"],
         environment: "happy-dom",
         coverage: {
             reporter: [ "text", "html" ],