Continue from progress.md and implement the next unfinished TODO.

Rules:
- Do not ask questions.
- Make reasonable assumptions.
- Mark completed TODO items with [x].
- Add useful follow-up TODOs when needed.
- Run tests/lint/build when available.
- Do not run destructive commands such as git reset, git clean, rm -rf, force push, deploy, or production migrations.
- Keep going while work remains.