chore: setup vitest

package.json

@@ -15,7 +15,12 @@
     "format": "dprint fmt",
     "format:check": "dprint check",
     "test:e2e": "playwright test",
-    "test": "npm run test:e2e",
+    "test:unit": "vitest run",
+    "test:unit:watch": "vitest",
+    "test:unit:ui": "vitest --ui",
+    "test:unit:coverage": "vitest run --coverage",
+    "test:component": "vitest run --config vitest.config.component.ts",
+    "test": "npm run test:e2e && npm run test:unit",
     "storybook": "storybook dev -p 6006",
     "build-storybook": "storybook build"
   },
@@ -31,12 +36,16 @@
     "@storybook/svelte-vite": "^10.1.11",
     "@sveltejs/vite-plugin-svelte": "^6.2.1",
     "@tailwindcss/vite": "^4.1.18",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/svelte": "^5.3.1",
     "@tsconfig/svelte": "^5.0.6",
+    "@types/jsdom": "^27",
     "@vitest/browser-playwright": "^4.0.16",
     "@vitest/coverage-v8": "^4.0.16",
     "bits-ui": "^2.14.4",
     "clsx": "^2.1.1",
     "dprint": "^0.50.2",
+    "jsdom": "^27.4.0",
     "lefthook": "^2.0.13",
     "oxlint": "^1.35.0",
     "playwright": "^1.57.0",
@@ -50,6 +59,7 @@
     "tw-animate-css": "^1.4.0",
     "typescript": "^5.9.3",
     "vite": "^7.2.6",
-    "vitest": "^4.0.16"
+    "vitest": "^4.0.16",
+    "vitest-browser-svelte": "^2.0.1"
   }
 }