Bump @floating-ui/dom from 1.7.6 to 1.8.0

[julien-deramond]

Summary

• Bumps @floating-ui/dom from ^1.7.6 to ^1.8.0 in peerDependencies and devDependencies (package.json, package-lock.json).
• Updates the pinned jsDelivr CDN URL for @floating-ui/dom in config.yml, used by the import-map examples in the docs.

Impact

This is a semver-minor release (1.8.0 release notes). No breaking changes for Menu, Tooltip, Popover, or Combobox.

• New (unused by us): rootBoundary: 'layoutViewport' option — stays stable during pinch-zoom or when a mobile keyboard opens, unlike 'viewport'. We don't expose this option today, so it has no effect on current behavior.
• Bug fixes that improve our components:
  • autoUpdate now refreshes immediately on reference movement instead of waiting for the 1s layout-shift throttle, and its layout-shift observer refreshes correctly on root resize. Benefits Tooltip, Popover, and Menu, which rely on autoUpdate.
  • Clipping-ancestor detection is fixed for fixed-position elements, and scrollbar-gutter: stable (including both-edges) is now accounted for in viewport/clipping calculations. Improves positioning accuracy for boundary: 'clippingParents', our default.
  • inline() middleware no longer throws when a virtual element lacks getClientRects.
• Perf: smaller bundle size and less redundant per-call work in the core/dom positioning utilities.

Our peerDependencies range was already ^1.7.6, so this bump doesn't change what consumers can install — it only updates our own dev/CI copy and the CDN-pinned version shown in docs examples.

Verification

• npm run js-lint — passes (pre-existing warnings only)
• npm run js-compile — builds cleanly against 1.8.0
• Browser-mode unit tests could not run in this environment (missing Playwright browser binary); no code changes were needed beyond the version bumps.

[julien-deramond]

On my end, I think it can be merged without any issues. If you feel the same, @mdo, and you don’t think it’s too risky for the upcoming alpha (depending on when you’re planning to release it), feel free to merge directly.

Once it’s merged, I’ll update twbs/examples#997 accordingly.