Update Notes (2026-03-30):

1.Fixed the issue of jagged edges appearing on solid circles when displayed under million-level large coordinates.

2.Fixed incorrect icon styling on the default black background after file uploads.

3.Fixed the problem where selected annotation graphics could not be deselected or deleted.

4.Added the new multi-line text annotation feature.

5.Fixed the error that prevented exported DXF files from being opened (optimization is not fully completed; some CAD software still fails to open the files or displays error prompts currently).