Index: test/boost-media.test.js
===================================================================
--- test/boost-media.test.js	(revision 7d19465e40d4878df20b30446977239bc27f911c)
+++ test/boost-media.test.js	(revision 7d19465e40d4878df20b30446977239bc27f911c)
@@ -0,0 +1,65 @@
+// Cirkel/boost-media: een geboostte video-only post (Loops) verloor zijn media —
+// upsertBoostedNote keek alleen naar note.images (afbeeldingen) en de refresh
+// overschreef bestaande media_json met []. Dekt de typed-media opslag, de
+// niet-clobberen-refresh en de images-fallback af.
+//
+// Run: npm test   (= node --test)
+
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+
+process.env.DATABASE_PATH = ':memory:';
+process.env.PUBLIC_BASE_URL = 'https://klonkt.test';
+
+const dbMod = await import('../src/config/database.js');
+const db = dbMod.default;
+const AP = await import('../src/services/ActivityPubService.js');
+
+dbMod.initializeDatabase();
+
+const VIDEO_MEDIA = JSON.stringify([{ url: 'https://cdn.test/clip.720p.mp4', type: 'video/mp4' }]);
+
+function mediaOf(id) {
+  const r = db.prepare('SELECT media_json FROM ap_timeline WHERE slug = ? AND id = ?').get('me', id);
+  return r ? r.media_json : null;
+}
+
+test('boost van een video-only post bewaart de video in media_json', () => {
+  AP.upsertBoostedNote('me', {
+    object_uri: 'https://loops.test/n/1', actor_uri: 'https://loops.test/u/a',
+    actor_name: 'A', content: '<p>x</p>', media: VIDEO_MEDIA, images: [],
+  });
+  const m = JSON.parse(mediaOf('https://loops.test/n/1'));
+  assert.equal(m.length, 1);
+  assert.equal(m[0].type, 'video/mp4');
+});
+
+test('refresh met lege media clobbert een bestaande media_json NIET', () => {
+  // rij bestaat al (met video); een re-upsert die niks resolvede mag hem niet wissen
+  AP.upsertBoostedNote('me', {
+    object_uri: 'https://loops.test/n/1', actor_uri: 'https://loops.test/u/a',
+    actor_name: 'A', content: '<p>x2</p>', media: '[]', images: [],
+  });
+  const m = JSON.parse(mediaOf('https://loops.test/n/1'));
+  assert.equal(m.length, 1, 'media_json is gewist door een lege refresh');
+  assert.equal(m[0].type, 'video/mp4');
+});
+
+test('refresh met nieuwe media werkt de rij wel bij', () => {
+  const newer = JSON.stringify([{ url: 'https://cdn.test/clip2.mp4', type: 'video/mp4' }]);
+  AP.upsertBoostedNote('me', {
+    object_uri: 'https://loops.test/n/1', actor_uri: 'https://loops.test/u/a',
+    actor_name: 'A', content: '<p>x3</p>', media: newer, images: [],
+  });
+  assert.equal(JSON.parse(mediaOf('https://loops.test/n/1'))[0].url, 'https://cdn.test/clip2.mp4');
+});
+
+test('images-fallback (oude callers zonder note.media) blijft werken', () => {
+  AP.upsertBoostedNote('me', {
+    object_uri: 'https://old.test/n/2', actor_uri: 'https://old.test/u/b',
+    actor_name: 'B', content: '<p>y</p>', images: ['https://old.test/img.jpg'],
+  });
+  const m = JSON.parse(mediaOf('https://old.test/n/2'));
+  assert.equal(m[0].url, 'https://old.test/img.jpg');
+  assert.equal(m[0].type, 'image/jpeg');
+});