- Appointments: a Calendar button next to Add opens a month-grid dialog
(reuses the Calendar primitive + shared ScheduleList); the schedule day is
marked and selecting it lists that day's appointments.
- Patients sub-nav: new Prescriptions page (mock list + KPIs) with a compact
"New prescription" dialog reusing the patient quick-search pattern.
- Notes: deleting a note now goes through a reusable ConfirmDialog instead of
deleting immediately.
- New top-level Messages page: two-pane email-style inbox (list + reading pane
with mock reply composer), mirroring the Notes layout.
- Sidebar logo bumped from size-9 to size-10.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>