feat(onboarding): Support grouped options in ScmVirtualizedMenuList

[jaydgoss]

TLDR

ScmVirtualizedMenuList can now render react-select grouped options, with section headings and options each becoming one virtualized row. Flat option lists render exactly as before.

Details

react-select renders each option group as a single Group element wrapping all of its Option children, so the row-per-child virtualizer would treat an entire section as one 36px row. The menu list now flattens Group children into heading and option rows, rendering headings the way react-select's own Group does so the core Select's groupHeading styles still apply.

Rows are measured on mount (measureElement) instead of assuming a fixed height, since headings are shorter than options and an empty-label heading collapses to zero, and getItemKey keeps those measurements attached to rows when filtering shifts the list. Keyboard-focus scrolling maps the focused option to its flattened row index, so headings count toward the scroll target. The next PR in the stack uses this to section the SCM platform picker.

Stack

• PR 1: fix(onboarding): Sort SCM platform picker alphabetically
• PR 2 (this): feat(onboarding): Support grouped options in ScmVirtualizedMenuList
• PR 3: feat(onboarding): Section the SCM platform picker into Popular and Other

[github-actions]

📊 Type Coverage Diff

Metric	Before	After	Delta
Coverage	94.36%	94.36%	±0%
Typed	134,724	134,738	🟢 +14
Untyped	8,048	8,052	🔴 +4

🔍 4 new type safety issues introduced

any-typed symbols (4 new)

File	Line	Detail
static/app/components/onboarding/scm/scmVirtualizedMenuList.tsx	53	element (var)
static/app/components/onboarding/scm/scmVirtualizedMenuList.tsx	71	Heading (var(binding))
static/app/components/onboarding/scm/scmVirtualizedMenuList.tsx	87	groupOptions (var)
static/app/components/onboarding/scm/scmVirtualizedMenuList.tsx	90	option (var)

This is informational only and does not block the PR.

[sentry]

Sentry Snapshot Testing

Name	Added	Removed	Changed	Renamed	Unchanged	Skipped	Status
sentry-frontend sentry-frontend	0	0	0	0	473	0	✅ Unchanged

⚙️ sentry-frontend Snapshot Settings