Make the Highest urgency card follow the active filter

src/components/clinical-dashboard/differentials-home.tsx

@@ -872,20 +872,12 @@ function SourceStatusBanner({
 }
 
 /**
- * The two cards read different lists on purpose. Highest urgency is a safety net
- * over the whole result set, so a result-type or urgency lens must not hide an
- * emergent differential from it. Check next describes the list the clinician is
- * actually reading, so it follows the lens.
+ * Both cards read the filtered result set, so the rail always describes the list
+ * the clinician is actually looking at rather than a wider one they cannot see.
+ * A lens that hides every emergent differential therefore empties the urgency
+ * card too — the applied-filter chips above the results say why it is gone.
  */
-function InterpretationRail({
-  best,
-  results,
-  filteredResults,
-}: {
-  best: DifferentialResult;
-  results: DifferentialResult[];
-  filteredResults: DifferentialResult[];
-}) {
+function InterpretationRail({ best, results }: { best: DifferentialResult; results: DifferentialResult[] }) {
   return (
     <aside className="hidden min-w-0 gap-3 lg:grid" aria-label="Differential interpretation">
       <h2 className="flex items-center gap-2 text-sm font-extrabold uppercase tracking-kicker text-[color:var(--text-muted)]">
@@ -894,7 +886,7 @@ function InterpretationRail({
       </h2>
       {best.kind === "presentation" ? <LikelyPresentationCard lead={best} /> : null}
       <UrgencyCard results={results} />
-      <NextStepsCard results={filteredResults} />
+      <NextStepsCard results={results} />
     </aside>
   );
 }
@@ -1434,7 +1426,7 @@ function SearchResultsView({
               )}
             </section>
 
-            <InterpretationRail best={best} results={results} filteredResults={relevanceResults} />
+            <InterpretationRail best={best} results={relevanceResults} />
           </div>
         </div>
       )}

tests/differentials-interpretation-rail.dom.test.tsx

@@ -12,6 +12,8 @@ import { getDifferentialRecord, getPresentationWorkflow } from "@/lib/differenti
  *    rail that must stay readable at a glance.
  * 2. "Check next" aggregates the investigations the ranked differentials name,
  *    most-shared first, and never invents one of its own.
+ * 3. Both cards read the filtered result set, so the rail never describes a
+ *    wider list than the one on screen.
  */
 
 const catalogState = vi.hoisted(() => ({
@@ -141,27 +143,30 @@ describe("differentials interpretation rail", () => {
     expect(within(card).getByText("ECG / QT assessment")).toBeVisible();
   });
 
-  it("follows the urgency lens for check next while highest urgency keeps its safety-net rows", async () => {
+  it("makes both rail cards follow the urgency lens", async () => {
     renderWith(["lithium-adverse-effects-toxicity", "acute-dystonia"]);
 
     const card = await screen.findByTestId("differentials-shared-next-steps");
     expect(within(card).getByText("Thyroid function tests")).toBeVisible();
+    expect(within(card).getByText("ECG / QT assessment")).toBeVisible();
+    expect(screen.getByTestId("differentials-highest-urgency")).toBeVisible();
 
+    // Narrowing to High leaves only the urgent differential, so the rail must
+    // describe that list alone: the emergent row goes, and so does the
+    // investigation only the emergent differential named.
     await act(async () => {
       screen.getByTestId("differential-filter-trigger-phone").click();
     });
     await act(async () => {
-      screen.getByRole("radio", { name: "Emergent (1)" }).click();
+      screen.getByRole("radio", { name: "High (1)" }).click();
     });
     await act(async () => {
       screen.getByTestId("differential-filter-panel-done").click();
     });
 
-    // Thyroid function tests belonged to the filtered-out urgent differential.
-    expect(within(card).queryByText("Thyroid function tests")).not.toBeInTheDocument();
-    expect(within(card).getByText("ECG / QT assessment")).toBeVisible();
-    // The emergent safety net is not a lens result and stays put.
-    expect(screen.getByTestId("differentials-highest-urgency")).toBeVisible();
+    expect(screen.queryByTestId("differentials-highest-urgency")).not.toBeInTheDocument();
+    expect(within(card).getByText("Thyroid function tests")).toBeVisible();
+    expect(within(card).queryByText("ECG / QT assessment")).not.toBeInTheDocument();
   });
 
   it("hides the check-next card when no ranked differential names an investigation", async () => {