Bug: PhotoSwipe script wraps already linked images, breaking original links

[saasan]

Description

I found a bug where the PhotoSwipe script (_includes/extensions/photo-swipe.html) wraps all <img> elements (except those with emoji class) in a new <a class="photo-swipe"> element, including images that are already inside a link. This causes the original link functionality to be lost.

Current Behavior

When an image is already wrapped in a link like this:

<a href="https://example.com">
  <img src="image.jpg">
</a>

The script wraps it again, resulting in:

<a href="https://example.com">
  <a class="photo-swipe" href="image.jpg" ...>
    <img src="image.jpg">
  </a>
</a>

The original link to https://example.com becomes inaccessible.

Expected Behavior

Images that are already inside <a> tags should be skipped by the script to preserve their original link functionality.

Steps to Reproduce

1. Create a post with a linked image: <a href="https://example.com"><img src="image.jpg"></a>
2. Load the page with PhotoSwipe enabled
3. Click the image
4. PhotoSwipe opens instead of following the original link

Proposed Solution

I believe this can be fixed by adding a check to skip images whose parent element is already an <a> tag. I'd be happy to submit a pull request with this fix if you'd like.