Add OSM links for custom saved places

Link to the OSM search route, so we get a pin when opening OSM from
Marco

app/components/place-details.gjs

@@ -23,6 +23,7 @@ export default class PlaceDetails extends Component {
   @service storage;
   @service nostrAuth;
   @service nostrData;
+  @service mapUi;
   @tracked isEditing = false;
   @tracked showLists = false;
   @tracked isPhotoUploadActive = false;
@@ -345,9 +346,21 @@ export default class PlaceDetails extends Component {
 
   get osmUrl() {
     const id = this.place.osmId;
-    if (!id) return null;
-    const type = this.place.osmType || 'node';
-    return `https://www.openstreetmap.org/${type}/${id}`;
+    if (id) {
+      const type = this.place.osmType || 'node';
+      return `https://www.openstreetmap.org/${type}/${id}`;
+    }
+
+    const lat = this.place.lat;
+    const lon = this.place.lon;
+    if (!lat || !lon) return null;
+
+    const viewLat = this.mapUi.currentCenter?.lat ?? lat;
+    const viewLon = this.mapUi.currentCenter?.lon ?? lon;
+    const zoom = this.mapUi.currentZoom ?? 17;
+    const roundedZoom = Math.round(zoom);
+
+    return `https://www.openstreetmap.org/search?lat=${lat}&lon=${lon}&zoom=${roundedZoom}#map=${roundedZoom}/${Number(viewLat).toFixed(5)}/${Number(viewLon).toFixed(5)}`;
   }
 
   get gmapsUrl() {
@@ -591,7 +604,7 @@ export default class PlaceDetails extends Component {
 
       </div>
 
-      {{#if this.osmUrl}}
+      {{#if this.place.osmId}}
         <div class="meta-info">
           <p class="content-with-icon">
             <Icon @name="feather-camera" />

tests/integration/components/place-details-test.gjs

@@ -334,4 +334,54 @@ module('Integration | Component | place-details', function (hooks) {
     assert.dom(links[0]).hasText('+44 987 654 321');
     assert.dom(links[1]).hasText('+1 234-567 8900');
   });
+
+  test('it renders correct OpenStreetMap link for an OSM place', async function (assert) {
+    const place = {
+      title: 'OSM Place',
+      osmId: '12345',
+      osmType: 'node',
+      lat: 52.520008,
+      lon: 13.404954,
+    };
+
+    await render(<template><PlaceDetails @place={{place}} /></template>);
+
+    const osmLink = this.element.querySelector(
+      '.meta-info a[href^="https://www.openstreetmap.org/node/12345"]'
+    );
+    assert.ok(osmLink, 'OpenStreetMap link is rendered');
+    assert.strictEqual(
+      osmLink.getAttribute('href'),
+      'https://www.openstreetmap.org/node/12345'
+    );
+
+    assert.dom('button.btn-link').hasText('Add a photo');
+  });
+
+  test('it renders correct search-based OpenStreetMap link for a custom saved place', async function (assert) {
+    class MockMapUi extends Service {
+      currentCenter = { lat: 52.5, lon: 13.4 };
+      currentZoom = 15.6;
+    }
+    this.owner.register('service:map-ui', MockMapUi);
+
+    const place = {
+      title: 'Custom Place',
+      lat: 52.520008,
+      lon: 13.404954,
+    };
+
+    await render(<template><PlaceDetails @place={{place}} /></template>);
+
+    const osmLink = this.element.querySelector(
+      '.meta-info a[href^="https://www.openstreetmap.org/search"]'
+    );
+    assert.ok(osmLink, 'OpenStreetMap search link is rendered');
+    assert.strictEqual(
+      osmLink.getAttribute('href'),
+      'https://www.openstreetmap.org/search?lat=52.520008&lon=13.404954&zoom=16#map=16/52.50000/13.40000'
+    );
+
+    assert.dom('button.btn-link').doesNotExist();
+  });
 });