⬆ Bump @tanstack/router-vite-plugin from 1.19.0 to 1.121.27 in /frontend

---
updated-dependencies:
- dependency-name: "@tanstack/router-vite-plugin"
  dependency-version: 1.121.27
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]