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/widgets/ComparisonView/ui/FontList/FontList.svelte

@@ -9,8 +9,8 @@ import {
     FontVirtualList,
     type UnifiedFont,
     VIRTUAL_INDEX_NOT_LOADED,
-    appliedFontsManager,
-    fontStore,
+    fontCatalogStore,
+    fontLifecycleManager,
 } from '$entities/Font';
 import { getSkeletonWidth } from '$shared/lib/utils';
 import {
@@ -36,7 +36,7 @@ function getVirtualIndex(fontId: string | undefined): number {
     if (!fontId) {
         return -1;
     }
-    const idx = fontStore.fonts.findIndex(f => f.id === fontId);
+    const idx = fontCatalogStore.fonts.findIndex(f => f.id === fontId);
     if (idx === -1) {
         return VIRTUAL_INDEX_NOT_LOADED;
     }
@@ -77,11 +77,11 @@ function handleSelect(font: UnifiedFont) {
 /**
  * Returns true once the font file is loaded (or errored) and safe to render.
  * Called inside the template — Svelte 5 tracks the $state reads inside
- * appliedFontsManager.getFontStatus(), so each row re-renders reactively
+ * fontLifecycleManager.getFontStatus(), so each row re-renders reactively
  * when its file arrives.
  */
 function isFontReady(font: UnifiedFont): boolean {
-    const status = appliedFontsManager.getFontStatus(
+    const status = fontLifecycleManager.getFontStatus(
         font.id,
         DEFAULT_FONT_WEIGHT,
         font.features?.isVariable,

src/widgets/ComparisonView/ui/Search/Search.svelte

@@ -2,7 +2,7 @@
     Component: Search
     Typeface search input for the comparison view.
     Writes through appliedFilterStore; the global bridge in $features/FilterAndSortFonts
-    propagates the value into fontStore.
+    propagates the value into fontCatalogStore.
 -->
 <script lang="ts">
 import { appliedFilterStore } from '$features/FilterAndSortFonts';