new demo mode & tenure

frontend/src/lib/url-state.ts

@@ -63,6 +63,9 @@ const CRIME_OVERLAY_ID: OverlayId = 'crime-hotspots';
 
 export interface UrlState {
   viewState: ViewState;
+  /** True only when the URL carried explicit lat/lon/zoom (shared/dashboard link).
+   *  False on a fresh visit, so the app may centre on the visitor's IP instead. */
+  hasExplicitView: boolean;
   filters: FeatureFilters;
   poiCategories: Set<string>;
   overlays: Set<OverlayId>;
@@ -221,6 +224,7 @@ export function parseUrlState(): UrlState {
   const params = new URLSearchParams(window.location.search);
   const result: UrlState = {
     viewState: INITIAL_VIEW_STATE,
+    hasExplicitView: false,
     filters: parseFilters(params),
     poiCategories: new Set(),
     overlays: new Set(),
@@ -246,6 +250,7 @@ export function parseUrlState(): UrlState {
     const zoomN = Number(zoom);
     if (!isNaN(latN) && !isNaN(lonN) && !isNaN(zoomN)) {
       result.viewState = { latitude: latN, longitude: lonN, zoom: zoomN, pitch: 0 };
+      result.hasExplicitView = true;
     }
   }