test(sw): approve the 8cb98b3 viewer layer popup API and baseline

Test-only approval commit after the user-approved 8cb98b3 change on main
(sw-test-regression-baseline section 9); no protected path changes.
- public-api.approved.json re-snapshotted from the clean 8cb98b3 build:
  + SWLayerVisibilityIcon, SWLayerVisibilityIconProps (170 -> 172 exports).
- approvedMainCommit bcec066 -> 8cb98b3. No Story ID or tag change.
- docs/sw/sw-viewer-layer-bulb-switch-2026-10-22.md: change and verification.

packages/sw/tests/storybook-inventory.mjs

@@ -79,8 +79,11 @@ export const integratedChangedFiles = [
 // docs only, no source / CSS / Story change, public-api.approved.json kept).
 // -> bcec066 (2026-10-22, Merge chore/remove-legacy-launchers: user-approved removal of the legacy Windows launcher,
 // PORTABLE records and ZIP packaging scripts, f8cb5f8 9cdfdea; docs/scripts only plus one .storybook/qa note, no
-// source / CSS / Story change, public-api.approved.json kept).
-export const approvedMainCommit = 'bcec066bda171242ce119a46d714b305a024dd92'
+// source / CSS / Story change, public-api.approved.json kept)
+// -> 8cb98b3 (2026-10-22, user-approved commit on main: viewer layer popup bulb icon and all-layers switch, new public
+// export SWLayerVisibilityIcon / SWLayerVisibilityIconProps; Story content only, no Story ID / tag change;
+// public-api.approved.json re-snapshotted from the clean 8cb98b3 build).
+export const approvedMainCommit = '8cb98b373f9e5321c8d6c032a6d2031e942dc508'
 // 170a5c2: the SW/Header sidebar page of the home menu (the moved verification Stories are movedHomeMenuIds).
 export const homeMenuSidebarIds = ['sw-header--home-menu']
 // 6cf8854 SW Footer (current IDs after retiredFooterIds), 7f42923 viewer mode, 41e963a theme inheritance.