test(ui-checkbox): use the vitest-browser API in the toggle variant tests

[balzss]

Summary

• Convert the toggle variant tests to the vitest-browser API — page.getByRole().element() / .query() and expect.element instead of screen.* and waitFor. This is what fails build:types: screen isn't imported, so it resolves to the DOM global window.screen and tsc reports Property 'getByRole' does not exist on type 'Screen'.
• await the renderCheckbox calls — render returns Promise<RenderResult>, so the queries were running before React had committed.
• Pass { force: true } to the click. The <label> visually covers the real <input> and Playwright does genuine hit-testing, so the click timed out after 15s. Matches the five other click sites in this file.

Test-only; no component code touched. The role="button" / aria-pressed behaviour added in #2673 is correct and unchanged — those three assertions had simply never executed, since the job died at typecheck.

Context: #2673 opened 2026-07-31 and merged 2026-08-14, after the vitest-browser conversion landed on 2026-08-07. GitHub only re-runs PR checks when the head moves, not when the base does, so it merged on two-week-old green checks (its job list still shows Cypress component tests, a job that no longer exists). master has been red since — and so is every open PR, because PR checks build the merge ref.

Test Plan

• No manual verification needed; the three tests now actually run in CI for the first time.
• Worth a separate look: branch protection on master has strict: true but required_status_checks.contexts: [], so "require branches to be up to date" never engages and this can recur.

Fixes INSTUI-5158

🤖 Generated with Claude Code

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-08-17 10:50 UTC

[github-actions]

Visual regression report

⚠️ Changes detected.

Status	Count
Unchanged	0
Changed	1
New	96
Removed	32

📊 View full report

Diff images (33)

alert.png — baseline no longer produced

avatar.png — baseline no longer produced

badge.png — baseline no longer produced

billboard.png — baseline no longer produced

breadcrumb.png — baseline no longer produced

button-and-derivatives.png — baseline no longer produced

byline.png — baseline no longer produced

calendar.png — baseline no longer produced

checkbox.png — baseline no longer produced

checkboxgroup.png — baseline no longer produced

colorpicker.png — baseline no longer produced

contextview.png — baseline no longer produced

custom-and-lucide-icons.png — baseline no longer produced

dateinput-dateinput2.png — baseline no longer produced

datetimeinput.png — baseline no longer produced

diff-demo.png — 6324 pixels differ

drilldown.png — baseline no longer produced

filedrop.png — baseline no longer produced

form-errors.png — baseline no longer produced

heading.png — baseline no longer produced

img.png — baseline no longer produced

link.png — baseline no longer produced

menu.png — baseline no longer produced

metric-pill-tag-timeselect-text.png — baseline no longer produced

options.png — baseline no longer produced

pagination.png — baseline no longer produced

progressbar.png — baseline no longer produced

select-simpleselect.png — baseline no longer produced

table.png — baseline no longer produced

tabs.png — baseline no longer produced

tooltip.png — baseline no longer produced

treebrowser.png — baseline no longer produced

view.png — baseline no longer produced

_{Baselines come from the visual-baselines branch. They refresh on every merge to master.}