Add groomer view mode to the appointments calendar:
- Toggle between "Status" (existing) and "Groomer" color coding
- Per-groomer visibility toggles with color-coded buttons
- Appointments colored by assigned groomer in groomer view
- Groomer name shown on appointment blocks in groomer view
- Unassigned appointments shown in neutral gray
Satisfies groombook/groombook#11 requirements for side-by-side/unified
groomer schedule visibility and per-groomer filter/toggle.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Groom Book CTO