chore: Upgrade to Vitest 4 and regroup tests for performance (#2618)

package.json

@@ -68,7 +68,7 @@
     "@types/masonry-layout": "^4.2.8",
     "@typescript-eslint/eslint-plugin": "^8.30.1",
     "@typescript-eslint/parser": "^8.30.1",
-    "@vitest/coverage-istanbul": "^1.6.0",
+    "@vitest/coverage-istanbul": "^4.1.10",
     "conventional-changelog-conventionalcommits": "^8.0.0",
     "docsify-cli": "^4.4.4",
     "eslint": "^9.24.0",
@@ -86,8 +86,8 @@
     "semantic-release-export-data": "^1.1.0",
     "type-fest": "^4.41.0",
     "typescript": "^5.8.3",
-    "vitest": "^1.6.0",
-    "vitest-mock-extended": "^1.3.1"
+    "vitest": "^4.1.10",
+    "vitest-mock-extended": "^5.1.0"
   },
   "release": {
     "branches": [
@@ -188,7 +188,7 @@
     "format-check": "prettier --check .",
     "rollup": "rollup -c",
     "prune": "knip",
-    "test": "VITEST_GROUP=shared vitest run && VITEST_GROUP=isolated vitest run",
+    "test": "vitest run",
     "coverage": "vitest run --coverage"
   },
   "volta": {