feat(AnchoredOverlay): add disable flip property

[Bracciata]

Relates to https://github.com/dequelabs/launchpad/issues/1321

Adds a property to disable flipping (trying to keep element on screen by switching position).

[Copilot]

Pull request overview

Adds a disableFlip option to the React AnchoredOverlay component to prevent automatic flip-based repositioning, and updates supporting docs/tests. The PR also includes Playwright/tooling dependency upgrades and related config/lockfile updates.

Changes:

• Add disableFlip prop to AnchoredOverlay and wire it into Floating UI middleware selection.
• Add documentation and a unit test covering the new prop.
• Upgrade Playwright CT/test dependencies and adjust Playwright CT Vite/CommonJS config (with corresponding yarn.lock updates), plus a VPAT markdown reformat.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
yarn.lock	Updates toolchain dependency graph (Playwright/Vite/esbuild/postcss, etc.).
vpats/2026-02-23-cauldron.md	Markdown table formatting changes.
playwright-ct.config.ts	Adjusts Vite/Rollup commonjs options for Playwright CT.
packages/react/src/components/AnchoredOverlay/index.tsx	Introduces disableFlip prop and changes middleware selection behavior.
packages/react/src/components/AnchoredOverlay/AnchoredOverlay.test.tsx	Adds a new test case for disableFlip.
package.json	Bumps @playwright/* devDependencies.
docs/pages/components/AnchoredOverlay.mdx	Documents disableFlip and adds an example + props entry.

Comments suppressed due to low confidence (1)

packages/react/src/components/AnchoredOverlay/index.tsx:139

• Even with disableFlip enabled, preventTopOverflowMiddleware can still reset the placement (e.g., top -> bottom) when the overlay overflows the document top. That’s effectively a flip and contradicts the expectation that flipping is disabled. If the intent is truly “no flips,” gate this middleware behind !disableFlip (or clarify the prop/docs to state that top-overflow prevention can still change placement).

          crossAxis: false,
          boundary: 'clippingAncestors'
        }),
        preventTopOverflowMiddleware
      ].filter(Boolean),

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[Zidious]

Had a question inline otherwise LGTM, I'll get other folks review.