chore: configure vitest with project-based setup and coverage

apps/web/package.json

@@ -5,5 +5,8 @@
   "type": "module",
   "dependencies": {
     "@glossa/shared": "workspace:*"
+  },
+  "devDependencies": {
+    "jsdom": "^29.0.1"
   }
 }

apps/web/tsconfig.json

@@ -1,4 +1,5 @@
 {
   "extends": "../../tsconfig.base.json",
-  "references": [{ "path": "../../packages/shared" }]
+  "references": [{ "path": "../../packages/shared" }],
+  "compilerOptions": { "module": "ESNext", "moduleResolution": "bundler" },
 }

apps/web/vitest.config.ts

@@ -0,0 +1,3 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({ test: { environment: "jsdom", globals: true } });