maplibre-runtime-loader: start MapLibre attribution control collapsed

MapLibre's AttributionControl with compact:true still opens expanded
once attributions populate (on styledata/sourcedata), because
_updateCompact adds the maplibregl-compact-show class. Added a shared
addCollapsedAttributionControl helper that strips that class the first
time it appears, leaving the compact "i" bubble collapsed initially
while user clicks still toggle it. Used it for both the test map and the
production Google-Maps compat map, and bumped the module cache-busting
version tags so browsers reload the changed modules.

Assisted-By: Claude Opus 4.8 (via GitHub Copilot CLI)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: axeluhl

java/com.sap.sailing.gwt.ui/js/maps/google-maps-maplibre-compat.js

@@ -1,6 +1,6 @@
 // Core facade: implements the Google Maps JavaScript API surface on MapLibre GL JS.
 // Keep GWT wrapper conventions in gwt-maps-maplibre-compat.js.
-import { applyRaceStyle, createArrowSvg, createRaceStyle, lngLat, setSatelliteVisible } from './maplibre-test-utils.js?v=race-map-feedback-9';
+import { addCollapsedAttributionControl, applyRaceStyle, createArrowSvg, createRaceStyle, lngLat, setSatelliteVisible } from './maplibre-test-utils.js?v=race-map-feedback-18';
 
 function asLngLatLiteral(value) {
     if (Array.isArray(value)) return { lat: value[1], lng: value[0] };
@@ -199,8 +199,10 @@ class CompatMap {
             center: lngLat(initialCenter),
             zoom: toMapLibreZoom(options.zoom ?? 0),
             bearing: options.heading || 0,
-            pitch: 0
+            pitch: 0,
+            attributionControl: false
         });
+        addCollapsedAttributionControl(this.map, 'bottom-right');
         // MapLibre listens for gestures on this container, so interactive panes must be descendants.
         this.map.getCanvasContainer().append(this.overlayLayer, this.markerLayer, this.overlayMouseTarget, this.floatPane);
         requestAnimationFrame(() => this.map.resize());

java/com.sap.sailing.gwt.ui/js/maps/gwt-maps-maplibre-compat.js

@@ -1,6 +1,6 @@
 // GWT adapter: exposes branflake GWT Maps wrapper conventions over the Google-style MapLibre facade.
 // Keep MapLibre provider behavior in google-maps-maplibre-compat.js.
-import { installGoogleMapsCompat } from './google-maps-maplibre-compat.js?v=race-map-feedback-16';
+import { installGoogleMapsCompat } from './google-maps-maplibre-compat.js?v=race-map-feedback-18';
 
 function call(handler, event = {}) {
     if (typeof handler === 'function') handler(event);

java/com.sap.sailing.gwt.ui/js/maps/maplibre-test-utils.js

@@ -77,6 +77,28 @@ export function setSatelliteVisible(map, visible) {
     else map.once('idle', apply);
 }
 
+// Adds a compact AttributionControl that starts collapsed. MapLibre's `compact: true` still opens
+// the bubble once attributions populate (on styledata/sourcedata), so we strip the "show" class the
+// first time it appears. After that the control keeps `maplibregl-compact`, so MapLibre no longer
+// re-expands it and user clicks continue to toggle it normally.
+export function addCollapsedAttributionControl(map, position = 'bottom-right') {
+    const control = new maplibregl.AttributionControl({ compact: true });
+    map.addControl(control, position);
+    const collapse = () => {
+        const attrib = map.getContainer().querySelector('.maplibregl-ctrl-attrib.maplibregl-compact-show');
+        if (attrib) {
+            attrib.classList.remove('maplibregl-compact-show');
+            map.off('styledata', collapse);
+            map.off('sourcedata', collapse);
+            map.off('idle', collapse);
+        }
+    };
+    map.on('styledata', collapse);
+    map.on('sourcedata', collapse);
+    map.on('idle', collapse);
+    return control;
+}
+
 export function createRaceMap(containerId, options = {}) {
     const center = options.center || MARSEILLE_CENTER;
     const map = new maplibregl.Map({
@@ -85,9 +107,11 @@ export function createRaceMap(containerId, options = {}) {
         center: lngLat(center),
         zoom: toMapLibreZoom(options.zoom ?? 15),
         bearing: options.bearing ?? 0,
-        pitch: 0
+        pitch: 0,
+        attributionControl: false
     });
     map.addControl(new maplibregl.NavigationControl({ visualizePitch: false }), 'top-right');
+    addCollapsedAttributionControl(map, 'bottom-right');
     applyRaceStyle(map, options.seaMarksVisible);
     return map;
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/racemap/MapsLoader.java

@@ -44,7 +44,7 @@ public class MapsLoader {
      * The relative URL of the Google-Maps-compatibility facade ES module. The query parameter is a cache-busting
      * marker that is bumped whenever the facade changes. Package-private so {@link MapLibreProvider} can read it.
      */
-    final static String MAPS_COMPAT_MODULE_URL = "./js/maps/gwt-maps-maplibre-compat.js?v=race-map-feedback-17";
+    final static String MAPS_COMPAT_MODULE_URL = "./js/maps/gwt-maps-maplibre-compat.js?v=race-map-feedback-18";
 
     /**
      * The name of the {@code window} global through which both the Google Maps API and the compatibility ES module