Quick reference — everything the upgrade touches

Copied in (new files): content/includes/log*.php (6 files), content/lib/activity-parser.php, content/lib/fit-parser.php, content/log-functions.php, content/js/gallery.js, content/js/gallery-pagination.js, admin/edit-log.php, admin/upload-log-data.php, admin/upload-log-image.php, admin/delete-log-data.php, admin/delete-log-image.php, config/secrets.example.php.

Created: config/secrets.php (from config/example.secrets.php), data/log.yml, data/log/.gitkeep.

Edited (existing files): config/config.php (custom nav + routes), .htaccess (rewrite), includes/admin-head.php (Train link ×2), admin/content.php (log tab), admin/icons/sprite.svg (activity icon), content/css/custom.css (log styles), .gitignore, config/update-ignore, and optionally config/hooks.php (secrets migration).

You need to create config/secrets.php from config/example.secrets.php - The credentials have moved here from there original position within hooks.php