Refine sidebar, Notes, and Patients per review feedback

Round-2 fixes to the 6 features:

- Logo: enlarge the sidebar mark, drop the inline wordmark, and show
  "temetro" via a hover tooltip; bigger logo on the auth screens.
- Sidebar footer: wrap the quick-nav, clinic switcher, and user menu in a
  single bordered block so it reads as one footer instead of three cards.
- Sidebar nav: highlight the active page (usePathname + data-[active]), and
  add an Appointments & Schedule sub-page under Patients that auto-expands
  for the current section. New mock /appointments page; reachable via ⌘K.
- Notes: redesign to a two-pane list + editor with an Empty state on the
  right when nothing is selected; fix the editor so text starts top-left
  (div instead of a centering <button>); compact the toolbar; add
  .note-content typography in globals.css so headings/lists/etc. actually
  render (the app has no typography plugin).
- Patients: new PatientDetail laid out to fit the side Sheet (stacked
  full-width sections, no nested click-to-expand dialogs); keep Edit.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/app/(app)/appointments/page.tsx

@@ -0,0 +1,10 @@
+import { AppointmentsView } from "@/components/appointments/appointments-view";
+import { SidebarInset } from "@/components/ui/sidebar";
+
+export default function AppointmentsPage() {
+  return (
+    <SidebarInset className="flex flex-1 flex-col overflow-y-auto">
+      <AppointmentsView />
+    </SidebarInset>
+  );
+}