* Fix avatar occasionally stuck in spaceman
## Issue
Sometimes, we'll see a channel profile (e.g. in upper-right, in channel selector) stuck in the fallback Spaceman image.
This is due to OptimizedImage always starting with a blank src, and updated later when the mounted size has been determined. ChannelThumbnail, which uses OptimizedImage, captured the `onError` due to blank src.
## Fix
Don't mount the <img> until the optimum size has been determined.
* FileThumbnail: skip resolve if thumbnail url is specified
* UriIndicator: skip resolve if channel info is specified
* Notifications: disable batch resolve + use fetched data if available + fallback to resolve if n/a
The fallback is using the individual resolve when no direct data is provided and claim is undefined.
Recently changed to `<OptimizedImg>`, which was assuming the `src` never changes.
dejavu ... we also hit this issue when implementing the `IntersectionObserver` lazy-loading.
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.
