feat(icons): add icon macros, remap entity types, add icons to tabs and timeline
- Add new icon macros: coffee_bean, grinder, cup (redesigned), pencil,
clipboard, check, x_mark, arrow_down_tray, arrow_up_tray
- Remove orphaned building and wrench macros
- Remap entity icons: roast→coffee_bean, roaster→fire, gear→grinder
- Replace pill labels with entity-type icons in homepage activity rows
- Add entity-type icons to timeline cards and tab buttons
- Fix brew/bag card action icons (cup→beaker)
- Add entity_type field to TimelineEventView, add roaster detail picks
ce4f32c63f