feat(atomic): migrate atomic-segmented-facet to Lit

[Copilot]

Migrates atomic-segmented-facet from Stencil to Lit as part of the ongoing framework migration effort.

Changes

Component Migration

• atomic-segmented-facet.ts - New Lit implementation with full feature parity
  • Uses @bindStateToController for Facet, SearchStatus, TabManager state binding
  • Uses @mapProperty decorator for dependsOn attribute mapping
  • CSS styles via css template literal with CSS custom properties for border radius

Functional Component

• facet-segmented-value.ts - New Lit functional component using renderButton
• stencil-facet-segmented-value.tsx - Renamed original for backwards compatibility

Exports

• Added to index.ts and lazy-index.ts under ./facets/atomic-segmented-facet/

Tests

• Unit tests for component initialization, rendering states, value selection, cleanup
• Unit tests for functional component rendering and interaction
• E2E test structure (page object, fixture, basic tests)

Usage

<atomic-segmented-facet
  field="objecttype"
  label="Object Type"
  number-of-values="8"
  tabs-included='["all", "articles"]'
></atomic-segmented-facet>

Notes

• Existing Storybook stories work unchanged
• Cypress tests are skipped (describe.skip) - migration to Playwright pending

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• example.com
  • Triggering command: /home/REDACTED/.cache/ms-playwright/chromium_headless_shell-1194/chrome-linux/headless_shell /home/REDACTED/.cache/ms-playwright/chromium_headless_shell-1194/chrome-linux/headless_shell --disable-field-trial-config --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-back-forward-cache --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-component-update --no-default-browser-check --disable-default-apps --disable-dev-shm-usage --disable-extensions --disable-features=AcceptCHFrame,AvoidUnnecessaryBeforeUnloadCheckSync,DestroyProfileOnBrowserClose,DialMediaRouteProvider,GlobalMediaControls,HttpsUpgrades,LensOverlay,MediaRouter,PaintHolding,ThirdPartyStoragePartitioning,Translate,AutoDeElevate,RenderD (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Migrate atomic-segmented-facet</issue_title>
<issue_description>

Jira Issue: KIT-4955

Type: User Story
Status: New
Priority: Medium
Components: Atomic

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Comments on the Issue (you are @copilot in this section)

Custom agent used: StencilToLitMigrationV2
Specialized agent for migrating Atomic Stencil code to Lit with visual regression testing

• Fixes Migrate atomic-segmented-facet #6403

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