- Renamed all instances of 'Activity' to 'Job' in views, controllers, and models.
- Updated routes to reflect the change from activities to jobs.
- Modified database schema to rename the activities table to jobs and adjusted related columns.
- Updated locale files to change activity-related translations to jobs.
- Adjusted tests to ensure they reference jobs instead of activities.
- Removed the category field from jobs as they are now a plain list.
- Updated seed data and sample data generation to create jobs instead of activities.
The icon drawings were duplicated between Ruby and React; they now live in
app/javascript/menuIcons.json, read by both. Deletes the button and icon helpers
nothing calls any more, and their spec lines.
Part of #4933
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>