feat: improve indexing and embedded search

[sy-records]

Summary

• Fix Search indexing does not work if some links are broken
• Allow full text search on embedded content

Related issue, if any:

Close #2674
Close #2689, Thanks @Bowl42
Close #2675, Thanks @kokovtsev
Close #1277

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

For any code change,

• Related documentation has been updated, if needed
• Related tests have been added or updated, if needed

Does this PR introduce a breaking change?

• Yes
• No

Tested in the following browsers:

• Chrome
• Firefox
• Safari
• Edge

[vercel]

@sy-records is attempting to deploy a commit to the Docsify Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
docsify-preview	Ready	Preview, Comment	May 26, 2026 3:37am

[paulhibbitts]

Thanks for taking on this PR @sy-records ! I had a difficult time in trying to replicate search failures in codesandbox with a broken page so I created two GitHub Pages test repos based on the example provided by @kokovtsev after verifying locally.

Search index test (RC) - search for 'ipsum' fails:
https://github.com/paulhibbitts/docsify-v5-search-index-RC
https://paulhibbitts.github.io/docsify-v5-search-index-RC/#/

Search index test (PR preview build) - search for 'ipsum' succeeds:
https://github.com/paulhibbitts/docsify-v5-search-index-PR
https://paulhibbitts.github.io/docsify-v5-search-index-PR/#/

Hope you can also confirm these tests.

[sy-records]

That's right.

[paulhibbitts]

Thanks for addressing the embedded content search aspect in this PR as well @sy-records !

I've updated my two previous test repos.

Search index test (RC) - search for 'embedded' fails (removing the previous broken link test so search works again):
https://github.com/paulhibbitts/docsify-v5-search-index-RC
https://paulhibbitts.github.io/docsify-v5-search-index-RC/#/

Search index test (PR preview build) - search for 'embedded' succeeds:
https://github.com/paulhibbitts/docsify-v5-search-index-PR
https://paulhibbitts.github.io/docsify-v5-search-index-PR/#/

With the latest PR test build, both the broken link and embedded content search issues look fixed 👍🏼