feat(search): pin the results toolbar and float the map button on phones

The List/Map switch was a small grey control beside the results heading,
and the filters were plain dropdowns labelled "All Phases" and "Advanced".
Both scrolled away with the first result.

Search, filters and the List/Map switch now share one card pinned under
the header. Distance, phase and school type are pill controls in the row;
"Advanced" becomes "More filters" and counts only what it hides. The
switch is filled brand teal and says which view is on (aria-pressed).

On phones the search folds to a one-line summary once made, the filter
pills scroll sideways, and a floating Map/List button sits above the tab
bar in place of the toolbar switch. The selected pin's card now stacks
under that button instead of covering the tab bar.

Switching view from far down the list scrolls back to the top of the
results, and each switch is tracked as results_view_changed.

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

nextjs-app/components/HomeView.tsx

@@ -135,6 +135,27 @@ function CalendarIcon() {
   );
 }
 
+/* List / Map glyphs for the results view switch and its floating twin. */
+function ListIcon() {
+  return (
+    <svg {...ICON_PROPS} width={18} height={18}>
+      <path d="M9 6h11M9 12h11M9 18h11" />
+      <circle cx="4.5" cy="6" r="1" />
+      <circle cx="4.5" cy="12" r="1" />
+      <circle cx="4.5" cy="18" r="1" />
+    </svg>
+  );
+}
+
+function MapIcon() {
+  return (
+    <svg {...ICON_PROPS} width={18} height={18}>
+      <path d="M9 4 3 6v14l6-2 6 2 6-2V4l-6 2-6-2Z" />
+      <path d="M9 4v14M15 6v14" />
+    </svg>
+  );
+}
+
 interface ValueProp {
   icon: React.ReactNode;
   tintClass: string;
@@ -213,6 +234,8 @@ export function HomeView({ initialSchools, filters, totalSchools, howItWorks, ed
   const [mapSchools, setMapSchools] = useState<School[]>([]);
   const [isLoadingMap, setIsLoadingMap] = useState(false);
   const prevSearchParamsRef = useRef(searchParams.toString());
+  const toolbarRef = useRef<HTMLDivElement>(null);
+  const resultsRef = useRef<HTMLElement>(null);
   const mapParamsRef = useRef<string>('');
   const loadMoreController = useRef<AbortController | null>(null);
   // Identity changes even for A → B → A, so an old A response stays stale.
@@ -449,6 +472,30 @@ export function HomeView({ initialSchools, filters, totalSchools, howItWorks, ed
     });
   }, [addSchool, selectedSchools.length]);
 
+  const hasViewSwitch = isLocationSearch && initialSchools.schools.length > 0;
+
+  /*
+   * Switching view from far down the list would otherwise leave the reader
+   * looking at whatever now sits at that scroll offset, usually the footer,
+   * because the map layout is much shorter than a long list. Bring the top of
+   * the results back to just under the pinned toolbar instead.
+   */
+  const changeView = (view: 'list' | 'map', via: 'toolbar' | 'floating') => {
+    if (view === resultsView) return;
+    setResultsView(view);
+    track('results_view_changed', { view, via });
+    requestAnimationFrame(() => {
+      const results = resultsRef.current;
+      const toolbar = toolbarRef.current;
+      if (!results || !toolbar) return;
+      const toolbarBottom = toolbar.getBoundingClientRect().bottom;
+      const resultsTop = results.getBoundingClientRect().top;
+      if (resultsTop < toolbarBottom) {
+        window.scrollTo({ top: window.scrollY + resultsTop - toolbarBottom - 12 });
+      }
+    });
+  };
+
   return (
     /* The landing arrangement owns its own vertical rhythm (one gap, set in
        CSS); the search arrangement is a filter bar directly above its results
@@ -523,15 +570,41 @@ export function HomeView({ initialSchools, filters, totalSchools, howItWorks, ed
         </ul>
         </div>
       ) : (
-        <FilterBar
-          filters={filters}
-          isHero={false}
-          resultFilters={initialSchools.result_filters}
-          onNearMe={handleNearMe}
-          geoState={geoState}
-          geoError={geoError}
-          autosuggest={autosuggest}
-        />
+        /* Pinned under the header, so the search, the filters and the List/Map
+           switch stay in reach however far down the results a reader is. */
+        <div ref={toolbarRef} className={styles.resultsToolbar}>
+          <FilterBar
+            filters={filters}
+            isHero={false}
+            resultFilters={initialSchools.result_filters}
+            onNearMe={handleNearMe}
+            geoState={geoState}
+            geoError={geoError}
+            autosuggest={autosuggest}
+          />
+          {hasViewSwitch && (
+            <div className={styles.viewSwitch} role="group" aria-label="Results view">
+              <button
+                type="button"
+                className={styles.viewSwitchBtn}
+                aria-pressed={resultsView === 'list'}
+                onClick={() => changeView('list', 'toolbar')}
+              >
+                <ListIcon />
+                List
+              </button>
+              <button
+                type="button"
+                className={styles.viewSwitchBtn}
+                aria-pressed={resultsView === 'map'}
+                onClick={() => changeView('map', 'toolbar')}
+              >
+                <MapIcon />
+                Map
+              </button>
+            </div>
+          )}
+        </div>
       )}
 
       {/* Next admissions deadline — one bar, not four cards. */}
@@ -583,7 +656,10 @@ export function HomeView({ initialSchools, filters, totalSchools, howItWorks, ed
           nothing to list — an empty <section> is still a flex child, so it was
           contributing a full section gap of blank space above the footer. */}
       {(isSearchActive || initialSchools.schools.length > 0) && (
-      <section className={`${styles.results} ${resultsView === 'map' && isLocationSearch ? styles.mapViewResults : ''}`}>
+      <section
+        ref={resultsRef}
+        className={`${styles.results} ${resultsView === 'map' && isLocationSearch ? styles.mapViewResults : ''} ${hasViewSwitch ? styles.hasViewFab : ''}`}
+      >
         {!hasSearch && initialSchools.schools.length > 0 && (
           <div className={styles.sectionHeader}>
             <h2>Featured Schools</h2>
@@ -602,34 +678,6 @@ export function HomeView({ initialSchools, filters, totalSchools, howItWorks, ed
               }
             </h2>
             <div className={styles.resultsHeaderActions}>
-              {isLocationSearch && initialSchools.schools.length > 0 && (
-                <div className={styles.viewToggle}>
-                  <button
-                    className={`${styles.viewToggleBtn} ${resultsView === 'list' ? styles.active : ''}`}
-                    onClick={() => setResultsView('list')}
-                  >
-                    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" width="16" height="16">
-                      <line x1="8" y1="6" x2="21" y2="6"/>
-                      <line x1="8" y1="12" x2="21" y2="12"/>
-                      <line x1="8" y1="18" x2="21" y2="18"/>
-                      <line x1="3" y1="6" x2="3.01" y2="6"/>
-                      <line x1="3" y1="12" x2="3.01" y2="12"/>
-                      <line x1="3" y1="18" x2="3.01" y2="18"/>
-                    </svg>
-                    List
-                  </button>
-                  <button
-                    className={`${styles.viewToggleBtn} ${resultsView === 'map' ? styles.active : ''}`}
-                    onClick={() => setResultsView('map')}
-                  >
-                    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" width="16" height="16">
-                      <path d="M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0 1 18 0z"/>
-                      <circle cx="12" cy="10" r="3"/>
-                    </svg>
-                    Map
-                  </button>
-                </div>
-              )}
               {resultsView === 'list' && (
                 <select
                   value={sortOrder}
@@ -705,20 +753,6 @@ export function HomeView({ initialSchools, filters, totalSchools, howItWorks, ed
               ))}
             </div>
 
-            {/* Mobile Bottom Sheet for Selected Map Pin */}
-            {selectedMapSchool && (
-              <div className={styles.bottomSheetWrapper}>
-                <div className={styles.bottomSheet}>
-                  <button className={styles.closeSheetBtn} onClick={() => setSelectedMapSchool(null)}>×</button>
-                  <CompactSchoolItem
-                    school={selectedMapSchool}
-                    onAddToCompare={addSchoolFromSearch}
-                    isInCompare={selectedSchools.some(s => s.urn === selectedMapSchool.urn)}
-                    nationalAvgRwm={nationalAvgRwm}
-                  />
-                </div>
-              </div>
-            )}
           </div>
         ) : (
           /* List View Layout */
@@ -769,6 +803,39 @@ export function HomeView({ initialSchools, filters, totalSchools, howItWorks, ed
         )}
       </section>
       )}
+
+      {/* Phones and small tablets: the selected pin's card, and on phones the
+          floating List/Map button, stacked above the bottom tab bar. The
+          toolbar's switch is hidden at phone width, where this replaces it. */}
+      {hasViewSwitch && (
+        <div className={styles.mobileDock}>
+          <button
+            type="button"
+            className={styles.viewFab}
+            aria-label={resultsView === 'list' ? 'Show map' : 'Show list'}
+            onClick={() => changeView(resultsView === 'list' ? 'map' : 'list', 'floating')}
+          >
+            {resultsView === 'list' ? <><MapIcon />Map</> : <><ListIcon />List</>}
+          </button>
+          {resultsView === 'map' && selectedMapSchool && (
+            <div className={styles.bottomSheet}>
+              <button
+                className={styles.closeSheetBtn}
+                onClick={() => setSelectedMapSchool(null)}
+                aria-label="Close"
+              >
+                ×
+              </button>
+              <CompactSchoolItem
+                school={selectedMapSchool}
+                onAddToCompare={addSchoolFromSearch}
+                isInCompare={selectedSchools.some(s => s.urn === selectedMapSchool.urn)}
+                nationalAvgRwm={nationalAvgRwm}
+              />
+            </div>
+          )}
+        </div>
+      )}
     </div>
   );
 }