A new "Saved views" filter-sidebar widget (SavedViewsWidget): save the
current filters under a name, apply one with a click (active-highlighted
when it matches), rename, delete (confirm), drag-reorder, share by link
(reuses shareUrl), and star one as the default. The default view's filters
are mirrored to localStorage so loadInitialFilters applies it synchronously
on load/F5 (an api/url share link still wins; no default → last-session
filters as before). Hidden for the demo account. EN/HU/DE.
- lib/store.ts: createStore<T> — one observable-value primitive (get/set/subscribe/use)
replacing the hand-rolled listeners/subscribe/emit triad several modules each had.
- lib/storage.ts: LS key registry (every siftlode.* key in one place), readMerged/
readJSON/writeJSON (the try/JSON.parse/merge/catch done once), and usePersistedState
(the reactive persisted-string hook, generalizing usePersistedTab).
