Objective:
- Get appropriately sized images to improve performance and Core Vitals score.
- Ensure images using "objectFit=cover" doesn't get stretched out if the source is large enough.
- Peg to 100px increments for better caching.
Notes:
- Skip images hosted in '/public'. If we really want to optimize it, then we'll need to provide the full path in the code, otherwise CDN lookup will fail.
If there are no API errors but no reactions returned, consider the requested IDs as "done" and stop requesting again. When a channel is being confirmed, Commentron doesn't return the reaction object.
Also added extra guard in case Commentron does return an object in the future, but an empty one.
- use `selectActiveChannelClaim` as that takes the current channel list into account (i.e. correct state when all channels are deleted).
- `selectActiveChannelId` should probably be removed or not exposed through a selector, as it is not updated when channel list changes?
## Issue
6068
## Change
Lock all images to fit a 16:9 container. We have implemented 'ZoomableImg', so no reason in trying to display in full size.
This reduces CLS from 0.4xx to 0.01x.
## Flaws
CLS could probably be zero if not for the spinner shifting things slightly. Also, mobile CLS is 0.07.
The troublesome part in this PR is that FileRenderInitiator, FileRender and their subcomponents are broken apart and it's hard to synchronize their visibility and size. There are time gaps where none of them are visible, etc.
This PR only tackles the major part (most bang for buck), which is the elimination of variable height of the rendered image.
## Aside
I think `claimIsMine` is unused, so don't waste time requesting it.
