Images cannot be previewed after document sharing

[qiongyu1999]

Background
When a document is shared, images within the page fail to load properly, breaking the reading experience.

Steps to Reproduce

1. Generate and open the share link.
2. Images do not display (show as broken links or blanks).

Expected Behavior
Images should display correctly on the shared page.

[qiongyu1999]

@mrcfps