[FR] Support graceful handling of no internet on timeline view

Timeline views shows user generated content in chats.

If there is a remote url like in the case of short from video "preload" usecase, currently blank screen is rendered.

This scenario of now internet should be gracefully handled.

Start by locating the timeline view and the handling for remote URLs in the short-video preload use case. Reproduce the blank-screen behavior with no internet access, then verify that the timeline shows a graceful result instead of rendering blank; no specific file or test is named in the issue.

Written by the indexing model from the issue text.