refactor(font): replace fontLifecycleManager singleton with lazy accessor

Convert the eager fontLifecycleManager singleton to getFontLifecycleManager()
(+ __resetFontLifecycleManager for tests), so its AbortController/FontFace
bookkeeping is set up on first use rather than at module load. Update consumers
(FontVirtualList, FontList, SampleList) and resolve it once as a field in
comparisonStore; the comparisonStore mock now exposes getFontLifecycleManager.

src/widgets/ComparisonView/model/stores/comparisonStore.test.ts

@@ -63,6 +63,14 @@ vi.mock('$entities/Font', async importOriginal => {
     };
 });
 
+const mockLifecycle = vi.hoisted(() => ({
+    touch: vi.fn(),
+    pin: vi.fn(),
+    unpin: vi.fn(),
+    getFontStatus: vi.fn(),
+    ready: vi.fn(() => Promise.resolve()),
+}));
+
 // Stores moved behind the model segment; mock them there. FontsByIdsStore is
 // intentionally left real (spread from actual) so $state reactivity works.
 vi.mock('$entities/Font/model', async importOriginal => {
@@ -70,13 +78,7 @@ vi.mock('$entities/Font/model', async importOriginal => {
     return {
         ...actual,
         getFontCatalog: () => mockFontCatalog,
-        fontLifecycleManager: {
-            touch: vi.fn(),
-            pin: vi.fn(),
-            unpin: vi.fn(),
-            getFontStatus: vi.fn(),
-            ready: vi.fn(() => Promise.resolve()),
-        },
+        getFontLifecycleManager: () => mockLifecycle,
     };
 });
 
@@ -100,10 +102,7 @@ vi.mock('$features/AdjustTypography/model', () => ({
 }));
 
 import * as proxyFonts from '$entities/Font/api/proxy/proxyFonts';
-import {
-    fontLifecycleManager,
-    getFontCatalog,
-} from '$entities/Font/model';
+import { getFontCatalog } from '$entities/Font/model';
 import { __resetFontCatalog } from '$entities/Font/model/store/fontCatalogStore/fontCatalogStore.svelte';
 import { ComparisonStore } from './comparisonStore.svelte';
 
@@ -273,12 +272,12 @@ describe('ComparisonStore', () => {
             new ComparisonStore();
 
             await vi.waitFor(() => {
-                expect(fontLifecycleManager.pin).toHaveBeenCalledWith(
+                expect(mockLifecycle.pin).toHaveBeenCalledWith(
                     mockFontA.id,
                     400,
                     mockFontA.features?.isVariable,
                 );
-                expect(fontLifecycleManager.pin).toHaveBeenCalledWith(
+                expect(mockLifecycle.pin).toHaveBeenCalledWith(
                     mockFontB.id,
                     400,
                     mockFontB.features?.isVariable,
@@ -299,12 +298,12 @@ describe('ComparisonStore', () => {
             store.fontA = mockFontC;
 
             await vi.waitFor(() => {
-                expect(fontLifecycleManager.unpin).toHaveBeenCalledWith(
+                expect(mockLifecycle.unpin).toHaveBeenCalledWith(
                     mockFontA.id,
                     400,
                     mockFontA.features?.isVariable,
                 );
-                expect(fontLifecycleManager.pin).toHaveBeenCalledWith(
+                expect(mockLifecycle.pin).toHaveBeenCalledWith(
                     mockFontC.id,
                     400,
                     mockFontC.features?.isVariable,