chore(deps): update vitest monorepo to v4

Author: renovate[bot]

package.json

@@ -43,15 +43,15 @@
     "@testing-library/svelte": "4.2.3",
     "@tsconfig/svelte": "5.0.5",
     "@vitest/coverage-c8": "0.33.0",
-    "@vitest/ui": "1.6.1",
+    "@vitest/ui": "4.0.1",
     "jsdom": "22.1.0",
     "svelte": "4.2.20",
     "svelte-check": "3.8.6",
     "tslib": "2.8.1",
     "typescript": "5.9.3",
     "vite": "5.4.21",
     "vite-plugin-dts": "3.9.1",
-    "vitest": "1.6.1"
+    "vitest": "4.0.1"
   },
   "publishConfig": {
     "access": "public"