- Add scripts/systemd/install.sh to handle placeholder substitution
(__PROJECT_DIR__, __USER__) and systemd unit installation in one command
- Simplify manual install instructions in SettingsPage and config.sh to
reference the new install script
- Preserve existing home.html and home.css in reset-site.sh instead of
overwriting with templates
- Add comments/ and partials/ to preserved directories list
- Fix nav removal in mkdocs.yml using Python regex instead of fragile sed
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>