refactor(GetFonts): centralize filterManager/sortStore → fontStore bridge

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.

src/features/GetFonts/model/index.ts

@@ -29,6 +29,12 @@ export {
     filterManager,
 } from './state/manager.svelte';
 
+/**
+ * Side-effect import: installs the global filterManager+sortStore → fontStore
+ * bridge on first import of this feature barrel. No exports.
+ */
+import './state/bindings.svelte';
+
 /**
  * Sorting logic
  */

src/features/GetFonts/model/state/bindings.svelte.ts

@@ -0,0 +1,36 @@
+/**
+ * Bridges feature-level UI state (filterManager + sortStore) to the
+ * entity-level fontStore query params.
+ *
+ * Centralizing this here means consumers (Search, FontSearch,
+ * FilterControls, etc.) bind to the manager/store directly without
+ * each repeating the same mapping effect. The bridge is a singleton
+ * concern — it tracks singleton state and writes to a singleton query
+ * observer, so it lives at module scope, not in any individual widget.
+ */
+
+import { fontStore } from '$entities/Font';
+import { untrack } from 'svelte';
+import { mapManagerToParams } from '../../lib/mapper/mapManagerToParams';
+import { sortStore } from '../store/sortStore.svelte';
+import { filterManager } from './manager.svelte';
+
+$effect.root(() => {
+    /**
+     * Mirror filter selections + debounced search query into fontStore params.
+     * untrack the write so fontStore's internal $state reads don't feed back
+     * into this effect's dependency graph.
+     */
+    $effect(() => {
+        const params = mapManagerToParams(filterManager);
+        untrack(() => fontStore.setParams(params));
+    });
+
+    /**
+     * Mirror sort selection into fontStore.
+     */
+    $effect(() => {
+        const apiSort = sortStore.apiValue;
+        untrack(() => fontStore.setSort(apiSort));
+    });
+});

src/features/GetFonts/ui/FiltersControl/FilterControls.svelte

@@ -4,16 +4,12 @@
     Sits below the filter list, separated by a top border.
 -->
 <script lang="ts">
-import { fontStore } from '$entities/Font';
 import type { ResponsiveManager } from '$shared/lib';
 import { cn } from '$shared/lib';
 import { Button } from '$shared/ui';
 import { Label } from '$shared/ui';
 import RefreshCwIcon from '@lucide/svelte/icons/refresh-cw';
-import {
-    getContext,
-    untrack,
-} from 'svelte';
+import { getContext } from 'svelte';
 import {
     SORT_OPTIONS,
     filterManager,
@@ -31,11 +27,6 @@ const {
     class: className,
 }: Props = $props();
 
-$effect(() => {
-    const apiSort = sortStore.apiValue;
-    untrack(() => fontStore.setSort(apiSort));
-});
-
 const responsive = getContext<ResponsiveManager>('responsive');
 const isMobileOrTabletPortrait = $derived(responsive.isMobile || responsive.isTabletPortrait);