[WC-3223]: Rename Checkbox Radio Selector widget to Option Selector

[rahmanunver]

Closes WC-3223.

Renamed

Where	From	To
Studio Pro toolbox (<name>)	Check box / radio selector	Option Selector
Marketplace listing 245825 (appName)	Checkbox Radio Selection	Option Selector
package.json description, README, editor dropzones, design-time fallback captions, read-only style description	old names	Option Selector

<description> was empty and is now filled in — it mentions checkbox and radio button so toolbox and Marketplace search still find the widget.

CHANGELOG.md gets an [Unreleased] → Changed entry. No version bump.

Unchanged (keeps existing apps working)

Widget ID, package.xml, widgetName, mpk name, npm package name, folder, generated typings, and the widget-checkbox-radio-selection* CSS classes.

Verified: all 34 property keys and 141 XML attribute tokens are identical to main, git diff typings/ is empty, the runtime bundle contains no renamed strings, and the MPK filename plus every internal path are unchanged — so an upgrade is a drop-in replacement.

Note: widgets dropped in Studio Pro after this ships get auto-names like optionSelector1; existing instances keep theirs, so current e2e locators still match.

Build 7/7, unit tests 8/8.

[github-actions]

AI Code Review

✅ Approved — no issues found

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What was reviewed

File	Change
src/CheckboxRadioSelection.xml	<name> → "Option Selector"; empty <description> filled in; readOnlyStyle property description updated
package.json	description and marketplace.appName updated to new name; identity fields (name, widgetName, mxpackage.*, appNumber) untouched
src/CheckboxRadioSelection.editorConfig.ts	Three dropzone placeholder strings updated
src/helpers/utils.ts	emptyStringFormat fallback caption updated
src/helpers/Preview/PreviewCaptionsProvider.tsx	emptyCaption updated
src/helpers/Association/utils.ts	Comment-only update
src/helpers/Database/utils.ts	Comment-only update
src/helpers/EnumBool/utils.ts	Comment-only update
src/helpers/Static/utils.ts	Comment-only update
src/ui/CheckboxRadioSelection.scss	Banner comment updated; CSS class names unchanged
src/ui/CheckboxRadioSelectionPreview.scss	Banner comment updated
CHANGELOG.md	[Unreleased] → Changed entry added
README.md	Title and usage step updated
openspec/changes/rename-option-selector/	New OpenSpec change artifacts (design, proposal, spec, tasks)

Skipped (out of scope): dist/, pnpm-lock.yaml, OpenSpec YAML/markdown artifacts (non-runtime)

⚠️ CI check status could not be fetched automatically. PR body states: Build 7/7, unit tests 8/8.

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Positives

• Identity preservation is airtight: widget ID, widgetName, mxpackage.*, packagePath, appNumber, CSS class prefix widget-checkbox-radio-selection*, and the mpk name are all unchanged — zero upgrade impact for existing apps is guaranteed.
• The new <description> explicitly names both "checkbox" and "radio button", satisfying the toolbox/Marketplace search discoverability requirement without cluttering the display name.
• The rename sweep is complete and consistent: every user-visible surface (toolbox, Marketplace, editor dropzones, structure-preview fallback captions, README, CHANGELOG) reads "Option Selector" with no half-renamed copy left behind.
• No version bump added — correctly deferred to release automation as per repo convention.
• CHANGELOG entry is user-facing and informative without leaking implementation details.