Remove hero

[micahmo]

Pull Request Description

This PR removes use of the Hero widget, which is what provides the transition animation with images popping in and out of posts. I recognize that this is more of a personal preference, and I think @hjiangsu should approve/deny this specifically, but I think (especially as we've changed other elements in the app), the Hero animation looks clunky in the scenarios where it remains. Of course, I'd be curious to hear what others think!

1. When a post is read, the animated image is translucent.
2. The preview has rounded corners, but the animated image does not.
3. The animation causes the preview to be reloaded.

qemu-system-x86_64_WKQOphCysF.mp4

4. The animation occurs even when the image is offscreen, causing it to come from nowhere.

qemu-system-x86_64_P4ydsBgjLC.mp4

5. The animation occurs when navigating back from a community.

qemu-system-x86_64_iL1sxlaEHU.mp4

6. Maybe one of the most important reasons (obviously not depicted): NSFW images are not blurred during the animation.

Review without whitespace.

Issue Being Fixed

Issue Number: N/A

Screenshots / Recordings

Checklist

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

[ajsosa]

Yeah I find the hero animation quite jarring when it animates from off screen. It's definitely a subjective thing but I definitely vote for it to be removed. But yeah we should wait for some input from @hjiangsu.

[machinaeZER0]

I'd also vote for removing/changing, especially after seeing all the examples/evidence back to back. Hopefully we'll hear back soon!

[hjiangsu]

Yeah, I'm good with us removing this because of the reasons mentioned above! Everything looks good to me!