[codex] Add healthcare compare scope

frontend/app/api/populace/compare/route.ts

@@ -16,6 +16,7 @@ export async function GET(request: Request) {
   let a = url.searchParams.get("a");
   let b = url.searchParams.get("b");
   const country = parseCountry(url.searchParams.get("country"));
+  const scope = url.searchParams.get("scope") === "healthcare" ? "healthcare" : null;
   try {
     // Default b to the latest release; a is required for a real diff.
     if (!b) b = (await loadPointerReleaseId(revalidate, country)).release_id;
@@ -25,7 +26,7 @@ export async function GET(request: Request) {
         { status: 400 },
       );
     }
-    const comparison = await loadComparison(a, b, revalidate, country);
+    const comparison = await loadComparison(a, b, revalidate, country, scope);
     return NextResponse.json(scrub(comparison));
   } catch (error) {
     return NextResponse.json(

frontend/app/populace/compare/page.tsx

@@ -1,10 +1,25 @@
 import { AppShell } from "@/components/layout/app-shell";
 import { PopulaceCompareView } from "@/components/populace/populace-compare-view";
 
-export default function PopulaceComparePage() {
+interface PopulaceComparePageProps {
+  searchParams?: Promise<Record<string, string | string[] | undefined>>;
+}
+
+export default async function PopulaceComparePage({
+  searchParams,
+}: PopulaceComparePageProps) {
+  const params = await searchParams;
+  const rawScope = Array.isArray(params?.scope) ? params.scope[0] : params?.scope;
+  const rawA = Array.isArray(params?.a) ? params.a[0] : params?.a;
+  const rawB = Array.isArray(params?.b) ? params.b[0] : params?.b;
+
   return (
     <AppShell>
-      <PopulaceCompareView />
+      <PopulaceCompareView
+        initialA={rawA ?? ""}
+        initialB={rawB ?? ""}
+        initialScope={rawScope === "healthcare" ? "healthcare" : "all"}
+      />
     </AppShell>
   );
 }