Fix performance and map tilt glitch

src/App.tsx

@@ -128,6 +128,11 @@ export default function App() {
   const labels = useMemo(() => buildLabels(places), [places]);
   const placeById = useMemo(() => new Map(realPlaces.map((p) => [p.id, p])), [realPlaces]);
 
+  const savedCounts = useMemo(() => {
+    const c: Record<Verdict, number> = { match: 0, partial: 0, conflict: 0, incomplete: 0, fail: 0 };
+    for (const a of assessments.values()) c[a.verdict]++;
+    return c;
+  }, [assessments]);
   const previewCounts = useCallback((p: Profile): Record<Verdict, number> => {
     const c: Record<Verdict, number> = { match: 0, partial: 0, conflict: 0, incomplete: 0, fail: 0 };
     if (index) for (const pl of realPlaces) c[assessPlace(pl, p, index, reports).verdict]++;
@@ -440,6 +445,7 @@ export default function App() {
               onDone={() => setView('places')}
               onSignOut={signOut}
               preview={previewCounts}
+              savedCounts={savedCounts}
             >
               {!needsProfile && (
                 <SettingsPanel

src/components/MapView.tsx

@@ -145,6 +145,9 @@ export function MapView({ places, showPlaces, selectedId, onSelect, route, route
       center: [(w + e) / 2, (s + n) / 2],
       zoom: 15,
       minZoom: 12,
+      maxPitch: 0, // flat map only: no two-finger tilt, no ctrl/right-drag tilt
+      dragRotate: false,
+      touchPitch: false,
       maxBounds: [[w - 0.04, s - 0.03], [e + 0.04, n + 0.03]],
       attributionControl: { compact: true },
       locale: {
@@ -153,6 +156,8 @@ export function MapView({ places, showPlaces, selectedId, onSelect, route, route
         'AttributionControl.ToggleAttribution': t('map.attrToggle'),
       },
     });
+    map.touchZoomRotate.disableRotation();
+    map.keyboard.disableRotation();
     map.addControl(new maplibregl.NavigationControl({ showCompass: false }), 'top-right');
     map.on('load', () => {
       map.addSource('places', { type: 'geojson', data: { type: 'FeatureCollection', features: [] } });

src/components/ProfileView.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useState } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 import type { Account } from '../lib/auth';
 import { useI18n, type Key } from '../lib/i18n';
 import { DEFAULT_PROFILE, PRESETS, activePreset, bucket } from '../lib/profile';
@@ -13,23 +13,43 @@ interface Props {
   onDone: () => void;
   onSignOut: () => void;
   preview: (p: Profile) => Record<Verdict, number>;
+  /** Verdict counts for the saved profile, already computed by the app: saves a second pass over every place. */
+  savedCounts: Record<Verdict, number> | null;
   children?: React.ReactNode;
 }
 
 const VERDICTS: Verdict[] = ['match', 'partial', 'conflict', 'incomplete', 'fail'];
 
-export function ProfileView({ account, profile, onChange, onDone, onSignOut, preview, children }: Props) {
+export function ProfileView({ account, profile, onChange, onDone, onSignOut, preview, savedCounts, children }: Props) {
   const { t } = useI18n();
   const [draft, setDraft] = useState<Profile>(profile ?? DEFAULT_PROFILE[account.preset ?? 'wheelchair']);
-  const update = (p: Profile) => { setDraft(p); if (profile) onChange(p); };
+  // The draft follows the control instantly; the saved profile (which re-assesses every place) only catches up once changes pause.
+  const pending = useRef<Profile | null>(null);
+  const timer = useRef<number | undefined>(undefined);
+  const onChangeRef = useRef(onChange);
+  onChangeRef.current = onChange;
+  const flush = () => {
+    window.clearTimeout(timer.current);
+    if (pending.current) { onChangeRef.current(pending.current); pending.current = null; }
+  };
+  const update = (p: Profile) => {
+    setDraft(p);
+    if (!profile) return;
+    pending.current = p;
+    window.clearTimeout(timer.current);
+    timer.current = window.setTimeout(flush, 300);
+  };
+  useEffect(() => flush, []); // leaving the page must not drop the last change
   const set = <K extends keyof Profile>(k: K, v: Profile[K]) => update({ ...draft, [k]: v });
 
-  // Debounced live preview: how many places fall into each verdict with these limits.
-  const [counts, setCounts] = useState<Record<Verdict, number> | null>(null);
+  // Live preview: how many places fall into each verdict with these limits. A saved profile reuses the app's own assessments.
+  const [onboardCounts, setOnboardCounts] = useState<Record<Verdict, number> | null>(null);
   useEffect(() => {
-    const id = setTimeout(() => setCounts(preview(draft)), 250);
+    if (profile) return;
+    const id = setTimeout(() => setOnboardCounts(preview(draft)), 250);
     return () => clearTimeout(id);
-  }, [draft, preview]);
+  }, [profile, draft, preview]);
+  const counts = profile ? savedCounts : onboardCounts;
 
   const active = activePreset(draft);
   const presets = PRESETS.filter((p) => p.kind === draft.kind);
@@ -151,7 +171,7 @@ export function ProfileView({ account, profile, onChange, onDone, onSignOut, pre
       <p className="font-sans-xs text-base-dark margin-top-2">
         <Icon name="lock" size={2} className="margin-right-05" />{t('profile.privacy')} {profile && t('profile.autosave')}
       </p>
-      <button type="button" className="usa-button usa-button--big margin-top-2" onClick={() => { onChange(draft); onDone(); }}>
+      <button type="button" className="usa-button usa-button--big margin-top-2" onClick={() => { pending.current = null; window.clearTimeout(timer.current); onChange(draft); onDone(); }}>
         {t('profile.done')}
         <Icon name="arrow_forward" size={3} className="margin-left-1" />
       </button>