[Feature] Share books using button

[acco7487]

Platform

Android

Linux Distribution (if applicable)

No response

Why is this feature needed?

To share the actual book or open it in apps like Kindle.

Feature Description

I noticed that the current Share button only shares the book cover. It would be really useful if the share function could instead reference the downloaded book file itself, so the actual book can be shared or opened in other apps.

Alternatives Considered

No response

Additional Context/Screenshots

No response

Checklist

• I have searched existing issues for similar feature requests.