Sharpen exec summary for the Epic-transition reader; tighten flow

- Executive summary "For health systems" now leads with Epic explicitly and
  the three cards are framed as what the EHR structurally can't do, feeding
  context back into Epic, and patient-owned persistence — aimed at a reader
  whose world is the Epic transition.
- Merge the redundant "Where we fit" section into "Why this is different"
  (kept its one strong highlight card), dropping the now-unused Badge import.
- Homepage: add a one-line "works alongside the systems a care team already
  uses, not instead of them" bridge in the differentiation section, keeping
  the hero purely consumer.

src/app/(marketing)/page.tsx

@@ -243,7 +243,9 @@ export default function HomePage() {
           <p className="max-w-2xl text-muted-foreground">
             The crowded space already has visit recorders, medication apps, and
             caregiver portals. Medscribe&apos;s wedge is the private, portable
-            context layer families control before an institution is ready.
+            context layer families control before an institution is ready — and
+            it works alongside the systems a care team already uses, not instead
+            of them.
           </p>
         </div>