feat(web): improve individual share ux

[devsnek]

Description

Renders share assets of type INDIVIDUAL directly with AssetViewer instead of going through the GalleryViewer. This makes sharing an individual image a bit cleaner, as the person you share it with sees it directly when they open it, instead of having to click through the gallery. If public upload is enabled, then the GalleryViewer is still used. To keep the functionality consistent, some small changes were made to the AssetViewer as well.

note: most of this diff is indentation, i recommend reviewing with the "hide whitespace" option (append ?w=1 to the files url).

How Has This Been Tested?

• Test A - single image + no public upload
• Test B - multiple image + no public upload
• Test C - single image + public upload
• Test D - multiple image + public upload

Screenshots (if appropriate)

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if applicable
• I have no unrelated changes in the PR.
• I have confirmed that any new dependencies are strictly necessary.
• I have written tests for new code (if applicable)
• I have followed naming conventions/patterns in the surrounding code
• All code in src/services/ uses repositories implementations for database calls, filesystem operations, etc.
• All code in src/repositories/ is pretty basic/simple and does not have any immich specific logic (that belongs in src/services/)

[jrasm91]

LGTM

[jrasm91]

LGTM