Datasets: URL→inline conversion drops url/fetchedAt

src/app/stores/DatasetStore.test.ts

@@ -112,6 +112,21 @@ describe('URL dataset edits & refresh', () => {
     expect(ds.name).toBe('Remote'); // preserved
   });
 
+  test('a URL→inline conversion removes the url/fetchedAt keys (not left undefined)', () => {
+    const id = seedUrl();
+    store().startEdit();
+    store().updateForm({ source: 'inline', input: '[{"x":1},{"x":2}]' });
+    const later = new Date('2026-07-01T00:00:00Z');
+    expect(store().save(later)).toBe(true);
+    const ds = store().datasets.find((d) => d.id === id)!;
+    expect(ds.source).toBe('inline');
+    expect(ds.rowCount).toBe(2);
+    // The remote origin is shed entirely — the keys are gone, not present-but-undefined,
+    // so an inline record carries no stale url/fetchedAt.
+    expect('url' in ds).toBe(false);
+    expect('fetchedAt' in ds).toBe(false);
+  });
+
   test('refreshDataset is a no-op for an inline dataset', () => {
     store().add(
       createDataset({ name: 'Inline', data: [{ a: 1 }], format: 'json', source: 'inline', now: T }),