deps(node): bump jsdom from 29.1.1 to 30.0.0

[dependabot]

Bumps jsdom from 29.1.1 to 30.0.0.

Release notes

Sourced from jsdom's releases.

v30.0.0

Breaking changes:

• Node.js minimum version raised to ^22.22.2 || ^24.15.0 || >=26.0.0.

Other changes:

• Added CSS.escape() and CSS.supports() functions. (@​asamuzaK)
• Added 'background-position-x' and 'background-position-y' CSS properties. (@​olagokemills)
• Fixed getComputedStyle() to convert length values into pixels. (@​asamuzaK)
• Fixed CSS function serialization, e.g., in the return value of getPropertyValue(). (@​asamuzaK)
• Fixed the type of error thrown by document.evaluate() (@​dokson)

Commits

• 20a01fc 30.0.0
• 8c8e583 Precompute WPT expectation matches
• f32245c Bump Node.js floor and dependencies
• 03ef23b Add background-position longhands
• ded056f Test CSS.escape() with numeric IDs
• d312832 Convert CSS values to pixels for computed styles
• 4e0ee41 Implement CSS.escape() and CSS.supports()
• 05eb709 Fix benchmark:compare script on Windows
• 97c1b90 Fix CSS function value serialization
• 15642ba Add benchmark comparison script
• Additional commits viewable in compare view

[kl3inIT]

Audit result: keep this PR open; it is not a false positive and is not safe to merge yet.

jsdom 30's corrected computed-style behavior makes the existing docs accessibility test observe real WCAG AA contrast failures that jsdom 29 did not surface. The failing mobile Chromium run reports, for example, 3.57:1, 2.13:1, and 1.88:1 text contrast where 4.5:1 is required on /docs/overview and /docs/architecture-security/system-description.

The dependency update itself is legitimate and the Node runtime floor is satisfied, but it needs a focused docs theme/transition color fix followed by the current public-docs E2E suite. Suppressing the axe findings or merging red would hide an actual accessibility defect.

[dependabot]

Superseded by #280.