fix(search): address review on the results toolbar

- Refold the phone search, and resync its text, when the query changes
  without a submit (back/forward, "Use my location"). The summary and the
  unfolded input could otherwise describe two different searches.
- Cap the "More filters" panel at every width, not only on phones, so an
  open panel scrolls inside the pinned toolbar on a short screen.
- Drop the phone filter row's right-edge fade once it is scrolled to the
  end or does not overflow (the MOBILE.md pattern), and give focus rings
  room inside the scroll clip.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

nextjs-app/__tests__/components/ResultsToolbar.test.tsx

@@ -102,6 +102,14 @@ describe('the toolbar filters', () => {
   });
 });
 
+describe('the phone filter row', () => {
+  it('drops its "more this way" fade when nothing is left to scroll', () => {
+    render(<FilterBar filters={filters} />);
+    // jsdom lays nothing out, so the row reads as not overflowing at all.
+    expect(screen.getByRole('group', { name: 'Filters' }).className).toMatch(/controlsAtEnd/);
+  });
+});
+
 describe('the folded search', () => {
   it('summarises the search and unfolds on tap', () => {
     render(<FilterBar filters={filters} />);
@@ -119,6 +127,22 @@ describe('the folded search', () => {
     expect(screen.getByRole('button', { name: /Edit search/ })).toBeInTheDocument();
   });
 
+  it('refolds and shows the new text when the search changes some other way', () => {
+    const view = render(<FilterBar filters={filters} />);
+    fireEvent.click(screen.getByRole('button', { name: /Edit search/ }));
+    fireEvent.change(screen.getByRole('searchbox', { name: 'School name or postcode' }),
+      { target: { value: 'half-typed' } });
+
+    // Back button: the URL changes under the component, nothing is submitted.
+    params = new URLSearchParams('postcode=SW170AA&radius=3');
+    view.rerender(<FilterBar filters={filters} />);
+
+    expect(screen.getByRole('button', { name: 'Edit search: SW170AA, within 3 miles' }))
+      .toBeInTheDocument();
+    expect(screen.getByRole('searchbox', { name: 'School name or postcode' }))
+      .toHaveValue('SW170AA');
+  });
+
   it('never appears in the hero, or before anything has been searched', () => {
     const { unmount } = render(<FilterBar filters={filters} isHero />);
     expect(screen.queryByRole('button', { name: /Edit search/ })).not.toBeInTheDocument();

nextjs-app/components/FilterBar.module.css

@@ -359,13 +359,18 @@
   border-color: var(--brand);
 }
 
+/* Capped so an open panel scrolls inside the pinned toolbar instead of
+   pushing the results off a short screen. The 3px gutter keeps the selects'
+   focus rings clear of the scroll clip. */
 .filters {
   flex-basis: 100%;
   display: flex;
   gap: 0.625rem;
   flex-wrap: wrap;
-  margin-top: 0.25rem;
-  padding-top: 0.75rem;
+  max-height: 50dvh;
+  overflow-y: auto;
+  margin: 0.25rem -3px 0;
+  padding: 0.75rem 3px 3px;
   border-top: 1px solid var(--border);
 }
 
@@ -568,16 +573,22 @@
 
   /* Bleeds to the screen edge so a chip scrolls out from under it, rather than
      being cut off at the toolbar's padding. The toolbar's inline padding is
-     1rem at this width (HomeView.module.css, .resultsToolbar). */
+     1rem at this width (HomeView.module.css, .resultsToolbar). The 4px of
+     block padding is room for focus rings, which the scroll clip would
+     otherwise cut off above and below the chips. */
   .controlsRow {
     flex-wrap: nowrap;
     overflow-x: auto;
-    margin-inline: -1rem;
-    padding-inline: 1rem;
+    margin: -4px -1rem;
+    padding: 4px 1rem;
     scrollbar-width: none;
     mask-image: linear-gradient(to right, #000 calc(100% - 28px), transparent);
   }
 
+  .controlsAtEnd {
+    mask-image: none;
+  }
+
   .controlsRow::-webkit-scrollbar {
     display: none;
   }
@@ -589,11 +600,4 @@
   .controlsRow .advancedToggle {
     order: -1;
   }
-
-  /* An open panel scrolls inside the pinned toolbar instead of pushing the
-     results off a short screen. */
-  .filters {
-    max-height: 50dvh;
-    overflow-y: auto;
-  }
 }

nextjs-app/components/FilterBar.tsx

@@ -154,6 +154,35 @@ export function FilterBar({
   const currentQuery = currentPostcode || currentSearch;
   const canFold = !isHero && !!currentQuery;
   const [searchOpen, setSearchOpen] = useState(false);
+
+  // A search that arrives any other way (back/forward, "Use my location", a
+  // link) must fold the form and show its own text, or the summary and the
+  // unfolded input would describe two different searches.
+  const [shownQuery, setShownQuery] = useState(currentQuery);
+  if (shownQuery !== currentQuery) {
+    setShownQuery(currentQuery);
+    setSearchOpen(false);
+    setOmniValue(currentQuery);
+  }
+
+  // The phone row's right-edge fade says "more this way"; once there is no
+  // more, it only dims the last chip. Same rule as the school page's section
+  // nav (MOBILE.md, "Right-edge scroll-fade").
+  const controlsRowRef = useRef<HTMLDivElement>(null);
+  const [controlsAtEnd, setControlsAtEnd] = useState(false);
+  const updateControlsAtEnd = useCallback(() => {
+    const el = controlsRowRef.current;
+    if (!el) return;
+    const overflow = el.scrollWidth - el.clientWidth;
+    setControlsAtEnd(overflow <= 1 || el.scrollLeft >= overflow - 2);
+  }, []);
+  useEffect(() => {
+    window.addEventListener("resize", updateControlsAtEnd);
+    return () => window.removeEventListener("resize", updateControlsAtEnd);
+  }, [updateControlsAtEnd]);
+  // Chips come and go with the search (distance, Clear), so re-measure after
+  // every render rather than only on resize.
+  useEffect(updateControlsAtEnd);
   const openSearch = () => {
     setSearchOpen(true);
     // After the form is displayed, or focus() lands on a hidden input.
@@ -423,7 +452,13 @@ export function FilterBar({
           {/* Every control here is a real <select> or <button>, drawn as a
               pill. On phones the row scrolls sideways rather than wrapping, so
               the pinned toolbar stays two lines tall. */}
-          <div className={styles.controlsRow} role="group" aria-label="Filters">
+          <div
+            ref={controlsRowRef}
+            className={`${styles.controlsRow}${controlsAtEnd ? ` ${styles.controlsAtEnd}` : ""}`}
+            role="group"
+            aria-label="Filters"
+            onScroll={updateControlsAtEnd}
+          >
             {currentPostcode && (
               <SelectShell>
                 <select