fix: properly show places on the map in detail view

Closes #252

frontend/app/src/app/modules/map/thing-bounds.pipe.spec.ts

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2026 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {SCGeoInformation} from '@openstapps/core';
+import {LngLatBounds} from 'maplibre-gl';
+import {ThingBoundsPipe} from './thing-bounds.pipe';
+
+describe('ThingBoundsPipe', () => {
+  const pipe = new ThingBoundsPipe();
+  const west = 8.6668;
+  const east = 8.67;
+  const south = 50.1255;
+  const north = 50.127;
+
+  it('should return [south-west, north-east] for a polygon', () => {
+    const geo = {
+      point: {type: 'Point', coordinates: [8.6684, 50.1262]},
+      polygon: {
+        type: 'Polygon',
+        coordinates: [
+          [
+            [west, north],
+            [east, north],
+            [east, south],
+            [west, south],
+            [west, north],
+          ],
+        ],
+      },
+    } as SCGeoInformation;
+
+    expect(pipe.transform(geo)).toEqual([
+      [west, south],
+      [east, north],
+    ]);
+  });
+
+  it('should not cross the antimeridian (MapLibre 6 reads west > east that way)', () => {
+    const geo = {
+      point: {type: 'Point', coordinates: [8.6684, 50.1262]},
+      polygon: {
+        type: 'Polygon',
+        coordinates: [
+          [
+            [east, south],
+            [west, north],
+            [east, north],
+            [east, south],
+          ],
+        ],
+      },
+    } as SCGeoInformation;
+
+    const bounds = LngLatBounds.convert(pipe.transform(geo));
+    expect(bounds.getWest()).toBeLessThan(bounds.getEast());
+  });
+
+  it('should return the point twice if there is no polygon', () => {
+    const geo = {point: {type: 'Point', coordinates: [8.6684, 50.1262]}} as SCGeoInformation;
+
+    expect(pipe.transform(geo)).toEqual([
+      [8.6684, 50.1262],
+      [8.6684, 50.1262],
+    ]);
+  });
+});

frontend/app/src/app/modules/map/thing-bounds.pipe.ts

@@ -13,8 +13,8 @@ export class ThingBoundsPipe implements PipeTransform {
       const lats = geo.polygon.coordinates[0].map(it => it[1]);
 
       return [
-        [Math.max(...lngs), Math.max(...lats)],
         [Math.min(...lngs), Math.min(...lats)],
+        [Math.max(...lngs), Math.max(...lats)],
       ];
     } else {
       return [geo.point.coordinates as [number, number], geo.point.coordinates as [number, number]];