UI tests: the marker-name test is a module of the tests/it binary (#2491)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/ui-egui/tests/it/main.rs

@@ -39,6 +39,7 @@ mod ui_layer_source_picker;
 mod ui_light_settings;
 mod ui_live_preview;
 mod ui_locked_color;
+mod ui_marker_names;
 mod ui_media_browser_cache;
 mod ui_media_browser_copy_path;
 mod ui_menus;