Multiple improvements

test/local-routes.test.js

@@ -730,3 +730,35 @@ test('creator identity never falls back to insecure randomness or replaces corru
   assert.throws(() => api.creatorId(), /Gerätekennung/);
   assert.equal(localStorage.getItem('wegwichtel.creator-id.v1'), 'broken');
 });
+
+
+test('route selection reads metadata only and station media is loaded and released separately', async () => {
+  const { api, context } = await loadLocalRoutes();
+  const reads = [0, 0];
+  const revoked = [];
+  let urlNumber = 0;
+  context.URL.createObjectURL = () => `blob:lazy-${++urlNumber}`;
+  context.URL.revokeObjectURL = url => revoked.push(url);
+  const files = [];
+  for (let id = 0; id < 2; id++) {
+    const file = Object.assign(new Blob(['image']), { name: `${id}.jpg` });
+    const handle = { async getFile() { reads[id]++; return file; } };
+    files.push(await api.storeMediaFile('lazy', id, 'image', id, file, handle));
+  }
+  api.save({ id: 'lazy', route: { name: 'Lazy' }, pois: files.map((image, id) => ({ id, images: [image] })) });
+  await api.getAppRoute('lazy');
+  api.get('lazy');
+  assert.deepEqual(reads, [0, 0]);
+  const first = await api.getPoiWithMedia('lazy', 0, { requestPermission: true });
+  assert.deepEqual(reads, [1, 0]);
+  assert.equal(first.images[0].url, 'blob:lazy-1');
+  const second = await api.getAppPoi('lazy', 1);
+  assert.deepEqual(reads, [1, 1]);
+  assert.equal(second.images[0].url, 'blob:lazy-2');
+  api.releasePoiMedia(first); api.releasePoiMedia(first); api.releasePoiMedia(second);
+  api.releasePoiMedia({ images: [{ url: 'https://example.org/image.jpg' }] });
+  assert.deepEqual(revoked, ['blob:lazy-1', 'blob:lazy-2']);
+  assert.equal(await api.getPoiWithMedia('lazy', 9), null);
+  assert.equal(await api.getAppPoi('missing', 0), null);
+  assert.equal(api.get('lazy').pois[0].images[0].url, undefined);
+});