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/SampleList/ui/SampleList/SampleList.svelte

@@ -7,9 +7,9 @@
 <script lang="ts">
 import {
     FontVirtualList,
-    appliedFontsManager,
     createFontRowSizeResolver,
-    fontStore,
+    fontCatalogStore,
+    fontLifecycleManager,
 } from '$entities/Font';
 import {
     TypographyMenu,
@@ -57,17 +57,17 @@ const checkPosition = throttle(() => {
 }, 100);
 
 // Resolver recreated when typography values change. The returned closure reads
-// appliedFontsManager.statuses (a SvelteMap) on every call, so any font status
+// fontLifecycleManager.statuses (a SvelteMap) on every call, so any font status
 // change triggers a full offsets recompute in createVirtualizer — no DOM snap.
 const fontRowHeight = $derived.by(() =>
     createFontRowSizeResolver({
-        getFonts: () => fontStore.fonts,
+        getFonts: () => fontCatalogStore.fonts,
         getWeight: () => typographySettingsStore.weight,
         getPreviewText: () => text,
         getContainerWidth: () => containerWidth,
         getFontSizePx: () => typographySettingsStore.renderedSize,
         getLineHeightPx: () => typographySettingsStore.height * typographySettingsStore.renderedSize,
-        getStatus: key => appliedFontsManager.statuses.get(key),
+        getStatus: key => fontLifecycleManager.statuses.get(key),
         contentHorizontalPadding: SAMPLER_CONTENT_PADDING_X,
         chromeHeight: SAMPLER_CHROME_HEIGHT,
         fallbackHeight: SAMPLER_FALLBACK_HEIGHT,

src/widgets/SampleList/ui/SampleListSection/SampleListSection.svelte

@@ -4,7 +4,7 @@
 -->
 <script lang="ts">
 import { NavigationWrapper } from '$entities/Breadcrumb';
-import { fontStore } from '$entities/Font';
+import { fontCatalogStore } from '$entities/Font';
 import type { ResponsiveManager } from '$shared/lib';
 import { cn } from '$shared/lib';
 import {
@@ -36,7 +36,7 @@ const responsive = getContext<ResponsiveManager>('responsive');
             id="sample_set"
             title="Sample Set"
             headerTitle="visual_output"
-            headerSubtitle="items_total: {fontStore.pagination.total ?? 0}"
+            headerSubtitle="items_total: {fontCatalogStore.pagination.total ?? 0}"
             headerAction={registerAction}
         >
             {#snippet headerContent()}