Additional styling to no-thumbnail mode

[hjiangsu]

Pull Request Description

This PR is just a follow up to #1302. It applies a bit more styling to the no-thumbnail mode to make it feel more consistent with our overall UI. There were just a few quirks that I ran into when using this mode!

• Applied some padding to the post feed card when no thumbnails is on (compact mode)
• Rounded the corners of the InkWell and fixed an issue where the InkWell tap was not extending to the whole LinkInformation container
• Added the link handling for MediaType.link (with long press modal)

Some misc changes are included here too:

• Made the image failure logic use the new LinkInformation widget to be consistent

Review with whitespace off

Issue Being Fixed

Issue Number: N/A

Screenshots / Recordings

Before	After

Before (tap/long press handling):

RPReplay_Final1713987953.mp4

After (tap/long press handling):

RPReplay_Final1713987975.mp4

Checklist

• Did you update CHANGELOG.md?
• Did you use localized strings where applicable?
• Did you add semanticLabels where applicable for accessibility?

[micahmo]

LGTM, nice catches!