Bump @vitest/coverage-v8 from 3.1.4 to 4.0.7 in /app

Bumps [@vitest/coverage-v8](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8) from 3.1.4 to 4.0.7.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.0.7/packages/coverage-v8)

---
updated-dependencies:
- dependency-name: "@vitest/coverage-v8"
  dependency-version: 4.0.7
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

app/package.json

@@ -65,7 +65,7 @@
     "@typescript-eslint/eslint-plugin": "^8.46.3",
     "@typescript-eslint/parser": "^8.32.1",
     "@vitejs/plugin-react": "^4.3.4",
-    "@vitest/coverage-v8": "^3.1.4",
+    "@vitest/coverage-v8": "^4.0.7",
     "eslint": "^9.39.1",
     "eslint-plugin-react": "^7.37.5",
     "eslint-plugin-react-hooks": "^5.2.0",