fix(popover): support touch-triggered tooltips

[dancormier]

Summary

• toggle Svelte tooltips when their references are activated by touch
• limit hover behavior to hover-capable pointers and respond to capability changes
• preserve keyboard focus behavior and existing dismissal behavior
• document touch, mouse, keyboard, cursor, and dismissal expectations
• add regression coverage for touch, hybrid devices, mouse input, and capability changes

Jira

STACKS-913

NXT-303

Testing locally

1. Install dependencies from the repository root with npm ci.
2. Start Stacks Svelte Storybook with npm run storybook -w packages/stacks-svelte.
3. Open the Popover Tooltip story.
4. In Chrome DevTools, enable the device toolbar and select a mobile device so pointer events are simulated as touch input.
5. Tap the Tooltip reference. The tooltip should open on the first tap and close on the second tap.
6. Open it again and tap outside the tooltip. The tooltip should close.
7. Disable device emulation and verify that mouse hover and keyboard focus still open the tooltip.

Accessibility

• keyboard focus continues to open tooltips
• touch users can open and dismiss tooltip content
• Escape, focus leave, outside click, and repeat touch dismissal remain supported
• mouse clicks do not independently trigger tooltips

Changeset

Patch release for @stackoverflow/stacks-svelte.

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🦋 Changeset detected

Latest commit: 9f1658d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

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[asblanco]

1. Medium — Component contract still documents tooltip mode as hover-only

At Popover.svelte:85:
STACKS-913 requires this interaction contract to be documented, but the public tooltip prop still describes tooltip mode as hover-only. Should we document touch toggling, keyboard focus, mouse behavior, and supported dismissal methods in the prop or component documentation?

[asblanco]

I was able to test it on my iPhone 16 Pro on Safari and on Qwant browsers and it worked well on both 🎉

ScreenRecording_08-28-2026.12-30-05_1.mov

I just posted with Codex 3 findings, have a look at them if they make sense for you to act on

[dancormier]

Addressed review finding 1 in 118e54669. The public tooltip prop now documents hover-capable pointer behavior, keyboard focus, touch toggling, mouse-click behavior, and supported dismissal methods.