chore(ui): apply M7 + L1 + L3 + L4 polish across medication form, motion-reduce, details aria, therapy timeline

W10 design-review carry-over items. M7 lifts the medication-form
day-of-week buttons, the more-horizontal trigger, and the schedule
label-input gaps to the 44 px / space-y-2 standard used by every
other settings surface. L1 pairs every animate-spin/pulse/bounce
with motion-reduce:animate-none across the component tree so users
with prefers-reduced-motion get a still surface. L3 adds the
aria-controls + panel-id pairing to the inventory + coach-evidence
<details> blocks for parity with the Health Score provenance
accordion. L4 inserts a sr-only h4 per therapy-timeline entry so
screen-reader users can jump between medication blocks.

src/components/ui/sonner.tsx

@@ -19,7 +19,7 @@ const Toaster = ({ ...props }: ToasterProps) => {
         info: <InfoIcon className="size-4" />,
         warning: <TriangleAlertIcon className="size-4" />,
         error: <OctagonXIcon className="size-4" />,
-        loading: <Loader2Icon className="size-4 animate-spin" />,
+        loading: <Loader2Icon className="size-4 animate-spin motion-reduce:animate-none" />,
       }}
       style={
         {