test(sw): approve the 21fe7a2 property count hover merge baseline

Test-only approval commit after the 21fe7a2 main merge (sw-test-regression-
baseline section 9); no protected path changes, no Story change.
- approvedMainCommit c73f043 -> 21fe7a2.
- public-api.approved.json kept: the public .d.ts files are byte-identical.
- docs/sw/sw-property-counts-hover-2026-10-21.md: change and verification.

packages/sw/tests/storybook-inventory.mjs

@@ -62,7 +62,9 @@ export const integratedChangedFiles = [
 // -> c73f043 (2026-10-21, Merge fix/sw-design-review-2026-10-21: user-approved doc alignment 8127cc7 — AI docs and
 // comments only, no Story or logic change; public-api.approved.json from the c73f043 build, comment-only .d.ts changes in
 // SWRecentFiles / home-menu types / viewer types for the preview and collapseBelow / iconOnlyBelow JSDoc).
-export const approvedMainCommit = 'c73f043a0163dd1996f1e6ab1267e55a578fdb10'
+// -> 21fe7a2 (2026-10-21, Merge fix/sw-property-counts-hover: user-approved property popup count Hover only on the
+// object list, 17170d2; no Story change, public .d.ts unchanged so public-api.approved.json is kept).
+export const approvedMainCommit = '21fe7a29c7c3350e0981ebf594ad6001c4f2bfd2'
 // 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.