[FR] Persist PDF annotations across sessions #2308
Description
Is your feature request related to a problem? Please describe.
When using the built-in PDF viewer, it is possible to add annotations such as comments, highlights, drawings, or signatures. These annotations are very useful. However, if the PDF is closed without being downloaded, all annotations are lost. This can easily lead to accidental data loss and frustration, especially when users expect their changes to persist automatically.
Describe the solution you'd like
Annotations made in the PDF viewer should be preserved when the PDF is closed and reopened, similar to how they are retained when the file is downloaded. Ideally, annotations should be saved automatically (or at least the user should be prompted to save changes) so that no work is lost.
Describe alternatives you've considered
As a workaround, users can manually download the PDF after making annotations to ensure the changes are saved. However, this is not intuitive and can easily be forgotten, especially when working with multiple documents.
Additional context
One of the strengths of the OC compared to competing solutions is the native PDF viewer with built-in annotation capabilities. Persisting annotations would significantly improve usability and align user expectations with standard document editing behavior.