Replace the hand-rolled let _x / getX / __resetX boilerplate with the
createSingleton helper in all nine remaining singleton stores. Exposed
accessor names (getX, __resetX) are unchanged, so consumers and specs are
unaffected. Teardown wired to each stores destroy() where it has one
(fontCatalog, fontLifecycle, typography, availableFilter, theme, layout,
scrollBreadcrumbs); sort and appliedFilter have no teardown. Also merges
layoutStores duplicate $shared/lib imports.
Wildcard re-exports obscure each slice public surface and weaken
tree-shaking. Convert to explicit named re-exports with export/export
type split (B-1) for ComparisonView, ChangeAppTheme, Breadcrumb/model,
and FilterAndSortFonts/api barrels.
Cleanup surfaced once the oxlint config actually loads (no-unused-vars).
- drop dead locals/imports/params (cachedOffsetTop, elasticOut, key,
unused type imports, unused test imports; _-prefix unused mock params)
- createVirtualizer: keep the _version read (reactive subscription inside
$derived.by) but bind it to _v so it is not flagged
- scrollBreadcrumbsStore.test: keep the removeEventListener mock side
effect, drop the unread spy binding
Convert the eager scrollBreadcrumbsStore singleton to getScrollBreadcrumbsStore()
(+ __resetScrollBreadcrumbsStore for tests) and add a public destroy() that
disconnects the IntersectionObserver and scroll listener. Update the feature
barrel and consumers (BreadcrumbHeader, BreadcrumbHeaderSeeded, NavigationWrapper).
Breadcrumb is not a business aggregate — it is a scroll-tracking navigation
capability (NavigationWrapper registers page sections into a store), so it
belongs in the features layer, not entities. Move the whole slice and
repoint its three widget consumers. entities/ now holds only Font, a true
aggregate.
Ilia Mashkov