Move the filtersStore → filterManager.setGroups $effect.root out of
manager.svelte.ts into bindings.svelte.ts so all cross-store reactive
wiring for the feature lives in one place. manager.svelte.ts now only
constructs and exports the singleton.
Move the duplicated $effect blocks that mapped filterManager and sortStore
into fontStore params out of Search, FontSearch and FilterControls into a
single $effect.root in features/GetFonts/model/state/bindings.svelte.ts.
Consumers now bind to the manager/store directly; the bridge is installed
once via a side-effect import from the feature barrel.
Ilia Mashkov