Use local data when possible

[gwendalF]

The preview should use the local data if present. Same as the image. The application should work without online access. A fetch should be done on the LinkCard only if nessecary. (Use timeout for example and listen to the current internet status https://developer.mozilla.org/en-US/docs/Web/API/Navigator/onLine)
For example user create link with internet access. When offline the description and image preview should still be available