Update frontend React Router packages to a patched compatible release

[Copilot]

Dependabot could not apply the React Router security update because react-router-dom@7.17.0 hard-pinned its transitive react-router@7.17.0 dependency. This change moves the frontend to the next compatible react-router-dom release so npm resolves a patched react-router without forcing an invalid downgrade path.

• Dependency update

  • Bump frontend's direct react-router-dom dependency from ^7.17.0 to ^7.18.1
  • Allow npm to resolve react-router to 7.18.1 through the package's declared dependency edge

• Lockfile refresh

  • Regenerate frontend/package-lock.json so the resolved tree records:
    • react-router-dom@7.18.1
    • react-router@7.18.1

• Effect on the dependency graph

  • Remove the vulnerable 7.17.0 -> 7.17.0 pairing that blocked the security update
  • Keep the upgrade scoped to the frontend package and its lockfile

{
  "dependencies": {
    "react-router-dom": "^7.18.1"
  }
}

[Copilot]

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