fix: preserve enclosing link state after parsing images

[snooze26h]

Marked version: 18.0.14, master at c61543ed0f16121ace9255626abcafe9514cb1b0

Markdown flavor: GitHub Flavored Markdown

Description

An image inside a link resets the lexer's inLink state to false. A following bare URL or email address is then autolinked inside the enclosing link, producing nested <a> elements and changing the document's clickable destinations.

[![logo](logo.png) www.example.com](https://target.example)

Expected:

<p><a href="https://target.example"><img src="logo.png" alt="logo"> www.example.com</a></p>

Current output:

<p><a href="https://target.example"><img src="logo.png" alt="logo"> <a href="http://www.example.com">www.example.com</a></a></p>

Save and restore the enclosing inLink value around the recursive label tokenization. Add a regression fixture in test/specs/new covering six inputs: bare URLs, email addresses, reference links/images, nested images, and normal autolinking after the enclosing link ends. Five of the inputs produce nested anchors before the fix.

This covers the state restoration left outside the scope of #4051. The trailing-URL test also checks the behavior fixed in #2186.

Validation

npm test passed on Node.js 24.20.0 (macOS arm64), including documentation/build generation, specification tests, unit tests, UMD/CJS checks, TypeScript checks, and lint. Re-run with the standard HTML differ: 1,863 specification tests and 193 unit tests passed. The fixture still fails against the pre-fix tokenizer using the standard HTML differ.

Contributor

• Tests exist to ensure functionality and minimize regression.
• No new feature or public API change requiring documentation.

Committer

• CI is green.
• Squash and merge following conventional commit guidelines.

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[UziTech]

Nice catch! Thanks for helping improve marked 💯

[UziTech]

@snooze26h did you mean to close this PR before it was merged?