feat: SEO backend data (1/4)

test/media_library_http_test.go

@@ -736,7 +736,7 @@ func TestMediaUsage(t *testing.T) {
 		if rec.Code != http.StatusOK {
 			t.Fatalf("expected status 200, got %d", rec.Code)
 		}
-		want := `[{"id": 1, "title": "Kitchen Renovation", "published": true}, {"id": 2, "title": "Backyard Notes", "published": false}]`
+		want := `[{"type": "article", "id": 1, "title": "Kitchen Renovation", "published": true, "fields": ["body"]}, {"type": "article", "id": 2, "title": "Backyard Notes", "published": false, "fields": ["body"]}]`
 		expectJSONEqual(t, rec.Body.String(), want)
 	})