refactor(Font): rename fontStore and appliedFontsManager

Both names were vague or overloaded:

- fontStore / FontStore -> fontCatalogStore / FontCatalogStore
  Three font-related stores live in this slice; the new name names the
  paginated catalog specifically.

- appliedFontsManager / AppliedFontsManager -> fontLifecycleManager /
  FontLifecycleManager
  "Applied" collided with the filter-side appliedFilterStore (different
  meaning). The class actually orchestrates a load-use-evict lifecycle
  with FontBufferCache + FontEvictionPolicy + FontLoadQueue
  collaborators, so "Manager" is justified. Companion types file moved
  alongside (appliedFonts.ts -> fontLifecycle.ts).

Directories, file basenames, factory (createFontStore ->
createFontCatalogStore), and the AppliedFontsManagerDeps interface all
renamed. All consumers (ComparisonView, SampleList, FontList,
FontApplicator, FontVirtualList, FilterAndSortFonts bindings,
createFontRowSizeResolver, mocks) updated.

src/entities/Font/ui/FontVirtualList/FontVirtualList.stories.svelte

@@ -10,7 +10,7 @@ const { Story } = defineMeta({
         docs: {
             description: {
                 component:
-                    'Virtualized font list backed by the `fontStore` singleton. Handles font loading registration (pin/touch) for visible items and triggers infinite scroll pagination via `fontStore.nextPage()`. Because the component reads directly from the `fontStore` singleton, stories render against a live (but empty/loading) store — no font data will appear unless the API is reachable from the Storybook host.',
+                    'Virtualized font list backed by the `fontCatalogStore` singleton. Handles font loading registration (pin/touch) for visible items and triggers infinite scroll pagination via `fontCatalogStore.nextPage()`. Because the component reads directly from the `fontCatalogStore` singleton, stories render against a live (but empty/loading) store — no font data will appear unless the API is reachable from the Storybook host.',
             },
             story: { inline: false },
         },
@@ -33,7 +33,7 @@ import type { ComponentProps } from 'svelte';
         docs: {
             description: {
                 story:
-                    'Skeleton state shown while `fontStore.fonts` is empty and `fontStore.isLoading` is true. In a real session the skeleton fades out once the first page loads.',
+                    'Skeleton state shown while `fontCatalogStore.fonts` is empty and `fontCatalogStore.isLoading` is true. In a real session the skeleton fades out once the first page loads.',
             },
         },
     }}
@@ -63,7 +63,7 @@ import type { ComponentProps } from 'svelte';
         docs: {
             description: {
                 story:
-                    'No `skeleton` snippet provided. When `fontStore.fonts` is empty the underlying VirtualList renders its empty state directly.',
+                    'No `skeleton` snippet provided. When `fontCatalogStore.fonts` is empty the underlying VirtualList renders its empty state directly.',
             },
         },
     }}
@@ -86,7 +86,7 @@ import type { ComponentProps } from 'svelte';
         docs: {
             description: {
                 story:
-                    'Demonstrates how to configure a `children` snippet for item rendering. The list will be empty because `fontStore` is not populated in Storybook, but the template shows the expected slot shape: `{ item: UnifiedFont }`.',
+                    'Demonstrates how to configure a `children` snippet for item rendering. The list will be empty because `fontCatalogStore` is not populated in Storybook, but the template shows the expected slot shape: `{ item: UnifiedFont }`.',
             },
         },
     }}

src/entities/Font/ui/FontVirtualList/FontVirtualList.svelte

@@ -18,8 +18,8 @@ import { getFontUrl } from '../../lib';
 import {
     type FontLoadRequestConfig,
     type UnifiedFont,
-    appliedFontsManager,
-    fontStore,
+    fontCatalogStore,
+    fontLifecycleManager,
 } from '../../model';
 
 interface Props extends
@@ -51,13 +51,13 @@ let {
 }: Props = $props();
 
 const isLoading = $derived(
-    fontStore.isFetching || fontStore.isLoading,
+    fontCatalogStore.isFetching || fontCatalogStore.isLoading,
 );
 
 let visibleFonts = $state<UnifiedFont[]>([]);
 let isCatchingUp = $state(false);
 
-const showInitialSkeleton = $derived(!!skeleton && isLoading && fontStore.fonts.length === 0);
+const showInitialSkeleton = $derived(!!skeleton && isLoading && fontCatalogStore.fonts.length === 0);
 const showCatchupSkeleton = $derived(!!skeleton && isCatchingUp);
 
 function handleInternalVisibleChange(items: UnifiedFont[]) {
@@ -68,23 +68,23 @@ function handleInternalVisibleChange(items: UnifiedFont[]) {
 
 /**
  * Handle jump scroll — batch-load all missing pages then re-enable font loading.
- * Suppresses appliedFontsManager.touch() during catch-up to avoid loading
+ * Suppresses fontLifecycleManager.touch() during catch-up to avoid loading
  * font files for thousands of intermediate fonts.
  */
 async function handleJump(targetIndex: number) {
-    if (isCatchingUp || !fontStore.pagination.hasMore) {
+    if (isCatchingUp || !fontCatalogStore.pagination.hasMore) {
         return;
     }
     isCatchingUp = true;
     try {
-        await fontStore.fetchAllPagesTo(targetIndex);
+        await fontCatalogStore.fetchAllPagesTo(targetIndex);
     } finally {
         isCatchingUp = false;
     }
 }
 
 const debouncedTouch = debounce((configs: FontLoadRequestConfig[]) => {
-    appliedFontsManager.touch(configs);
+    fontLifecycleManager.touch(configs);
 }, 150);
 
 // Re-touch whenever visible set or weight changes — fixes weight-change gap
@@ -111,11 +111,11 @@ $effect(() => {
     const w = weight;
     const fonts = visibleFonts;
     for (const f of fonts) {
-        appliedFontsManager.pin(f.id, w, f.features?.isVariable);
+        fontLifecycleManager.pin(f.id, w, f.features?.isVariable);
     }
     return () => {
         for (const f of fonts) {
-            appliedFontsManager.unpin(f.id, w, f.features?.isVariable);
+            fontLifecycleManager.unpin(f.id, w, f.features?.isVariable);
         }
     };
 });
@@ -125,12 +125,12 @@ $effect(() => {
  */
 function loadMore() {
     if (
-        !fontStore.pagination.hasMore
-        || fontStore.isFetching
+        !fontCatalogStore.pagination.hasMore
+        || fontCatalogStore.isFetching
     ) {
         return;
     }
-    fontStore.nextPage();
+    fontCatalogStore.nextPage();
 }
 
 /**
@@ -140,12 +140,12 @@ function loadMore() {
  * of the loaded items. Only fetches if there are more pages available.
  */
 function handleNearBottom(_lastVisibleIndex: number) {
-    const { hasMore } = fontStore.pagination;
+    const { hasMore } = fontCatalogStore.pagination;
 
     // VirtualList already checks if we're near the bottom of loaded items.
     // Guard isCatchingUp: fetchAllPagesTo bypasses TQ so isFetching stays false
     // during batch catch-up, which would otherwise let nextPage() race with it.
-    if (hasMore && !fontStore.isFetching && !isCatchingUp) {
+    if (hasMore && !fontCatalogStore.isFetching && !isCatchingUp) {
         loadMore();
     }
 }
@@ -160,8 +160,8 @@ function handleNearBottom(_lastVisibleIndex: number) {
     {:else}
         <!-- VirtualList persists during pagination - no destruction/recreation -->
         <VirtualList
-            items={fontStore.fonts}
-            total={fontStore.pagination.total}
+            items={fontCatalogStore.fonts}
+            total={fontCatalogStore.pagination.total}
             isLoading={isLoading || isCatchingUp}
             onVisibleItemsChange={handleInternalVisibleChange}
             onNearBottom={handleNearBottom}