fix(meds): notification section title id no longer duplicates the section heading

Split the two title ids so the Switch's aria-labelledby resolves
to the row label rather than the section heading. axe duplicate-id
gone; the announced name now matches the user's mental model.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/medications/sections/__tests__/notifications-section.test.tsx

@@ -0,0 +1,71 @@
+/**
+ * v1.5.5 F-1 H-1 — pin the split title ids on the notifications row.
+ *
+ * The earlier single `TITLE_ID` constant landed on both the section
+ * heading (`<MedicationDetailSection titleId={…}>`) and the inner
+ * `<span>` carrying the switch's `aria-labelledby`, producing a
+ * duplicate-id axe failure. The fix splits the two ids: the section
+ * heading carries `*-heading`, the inner row label carries
+ * `*-row-label`, and the switch's `aria-labelledby` points at the
+ * row label.
+ */
+
+import { describe, expect, it, vi } from "vitest";
+import { renderToStaticMarkup } from "react-dom/server";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+
+import { I18nProvider } from "@/lib/i18n/context";
+import { NotificationsSection } from "@/components/medications/sections/notifications-section";
+
+vi.mock("@/hooks/use-auth", () => ({
+  useAuth: () => ({
+    user: { id: "test-user", username: "tester", role: "USER" },
+    isAuthenticated: true,
+    isLoading: false,
+  }),
+}));
+
+function makeClient() {
+  return new QueryClient({
+    defaultOptions: {
+      queries: {
+        retry: false,
+        staleTime: Number.POSITIVE_INFINITY,
+        refetchOnMount: false,
+      },
+    },
+  });
+}
+
+function render(node: React.ReactNode, client: QueryClient) {
+  return renderToStaticMarkup(
+    <I18nProvider initialLocale="en">
+      <QueryClientProvider client={client}>{node}</QueryClientProvider>
+    </I18nProvider>,
+  );
+}
+
+describe("<NotificationsSection> — split title ids (F-1 H-1)", () => {
+  it("renders the section heading and the row label with distinct ids", () => {
+    const client = makeClient();
+    const html = render(
+      <NotificationsSection
+        medicationId="med-1"
+        notificationsEnabled={true}
+      />,
+      client,
+    );
+
+    // Section heading + row label sit on different DOM nodes so axe
+    // duplicate-id passes. The §10 invariant 4 row-as-hit-target also
+    // needs the row label to be the aria-labelledby target.
+    expect(html).toContain('id="medication-detail-notifications-heading"');
+    expect(html).toContain('id="medication-detail-notifications-row-label"');
+    expect(html).not.toContain('id="medication-detail-notifications-title"');
+
+    // The switch reaches the row label, not the section heading.
+    expect(html).toContain(
+      'aria-labelledby="medication-detail-notifications-row-label"',
+    );
+  });
+});

src/components/medications/sections/notifications-section.tsx

@@ -57,7 +57,15 @@ interface UserPrefsResponse {
 }
 
 const SWITCH_ID = "medication-detail-notifications-switch";
-const TITLE_ID = "medication-detail-notifications-title";
+// v1.5.5 F-1 H-1 — split the title id so the section heading and
+// the inner switch label resolve to distinct DOM nodes. The earlier
+// single `TITLE_ID` sat on both `<MedicationDetailSection>`'s heading
+// (`titleId` prop) and the inner `<span>` carrying the switch's
+// `aria-labelledby`, surfacing as an axe duplicate-id failure on
+// every detail-page render and pointing the announced name at the
+// section heading rather than the user's "Send a reminder" target.
+const SECTION_TITLE_ID = "medication-detail-notifications-heading";
+const ROW_TITLE_ID = "medication-detail-notifications-row-label";
 const HELPER_ID = "medication-detail-notifications-helper";
 
 export function NotificationsSection({
@@ -131,7 +139,7 @@ export function NotificationsSection({
 
   return (
     <MedicationDetailSection
-      titleId={TITLE_ID}
+      titleId={SECTION_TITLE_ID}
       title={t("medications.detail.notifications.title")}
       dataSlot="medication-detail-notifications-section"
     >
@@ -155,7 +163,7 @@ export function NotificationsSection({
           >
             <span className="space-y-1">
               <span
-                id={TITLE_ID}
+                id={ROW_TITLE_ID}
                 className="text-foreground block text-sm font-medium"
               >
                 {t("medications.detail.notifications.switchLabel")}
@@ -174,7 +182,7 @@ export function NotificationsSection({
               checked={localEnabled}
               disabled={submitting}
               onCheckedChange={(checked) => void flip(checked)}
-              aria-labelledby={TITLE_ID}
+              aria-labelledby={ROW_TITLE_ID}
               aria-describedby={HELPER_ID}
             />
           </label>