chore(deps): bump dompurify from 3.3.3 to 3.4.0 in /gui

[dependabot]

Bumps dompurify from 3.3.3 to 3.4.0.

Release notes

Sourced from dompurify's releases.

DOMPurify 3.4.0

Most relevant changes:

• Fixed a problem with FORBID_TAGS not winning over ADD_TAGS, thanks @​kodareef5
• Fixed several minor problems and typos regarding MathML attributes, thanks @​DavidOliver
• Fixed ADD_ATTR/ADD_TAGS function leaking into subsequent array-based calls, thanks @​1Jesper1
• Fixed a missing SAFE_FOR_TEMPLATES scrub in RETURN_DOM path, thanks @​bencalif
• Fixed a prototype pollution via CUSTOM_ELEMENT_HANDLING, thanks @​trace37labs
• Fixed an issue with ADD_TAGS function form bypassing FORBID_TAGS, thanks @​eddieran
• Fixed an issue with ADD_ATTR predicates skipping URI validation, thanks @​christos-eth
• Fixed an issue with USE_PROFILES prototype pollution, thanks @​christos-eth
• Fixed an issue leading to possible mXSS via Re-Contextualization, thanks @​researchatfluidattacks and others
• Fixed an issue with closing tags leading to possible mXSS, thanks @​frevadiscor
• Fixed a problem with the type dentition patcher after Node version bump
• Fixed freezing BS runs by reducing the tested browsers array
• Bumped several dependencies where possible
• Added needed files for OpenSSF scorecard checks

Published Advisories are here: https://github.com/cure53/DOMPurify/security/advisories?state=published

Commits

• 5b16e0b Getting 3.x branch ready for 3.4.0 release (#1250)
• See full diff in compare view

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Summary by cubic

Upgrade dompurify in /gui from 3.3.3 to 3.4.0 to bring in security fixes and stricter HTML sanitization. No app code changes; improves protection against XSS and prototype pollution.

• Dependencies
  • Bumped dompurify to 3.4.0, which fixes issues with FORBID_TAGS precedence, URI validation in ADD_ATTR, missing template scrubs in RETURN_DOM, and multiple prototype‑pollution and mXSS vectors.
  • No migration steps; note that sanitization may be stricter and strip more tags/attrs in edge cases.

^{Written for commit 929c08b. Summary will update on new commits.}

[continue]

Docs Review: No documentation updates needed.

This PR bumps dompurify from 3.3.3 to 3.4.0 in the GUI package. This is an internal dependency version update that doesn't affect any user-facing APIs, configuration options, or behaviors that would require documentation changes.

[cubic-dev-ai]

No issues found across 2 files