refactor(entities/Font): named public API and expose stores via root barrel

Stores were only reachable by deep-importing $entities/Font/model, so
consumers reached past the slice public API (FSD anti-pattern D, B-3/D-2).

- convert the Font barrels (root, model, model/store, model/types) to
  explicit named exports with export/export type split (B-1)
- re-export the lazy store accessors/classes from the root barrel so the
  entity public API is complete and inert at import (construction stays
  lazy; the root already loads tanstack via ./ui)
- repoint all consumers (SampleList, SampleListSection, FontList,
  comparisonStore, bindings) from $entities/Font/model to $entities/Font

src/entities/Font/index.ts

@@ -1,29 +1,90 @@
-export * from './domain';
+export {
-export * from './lib';
+    computeLineRenderModel,
-export * from './ui';
+    DualFontLayout,
+    findSplitIndex,
+} from './domain';
+export type {
+    ComparisonLine,
+    ComparisonResult,
+    LineRenderModel,
+} from './domain';
 
-// Pure model surface (types + constants) is part of the convenient top-level
+export {
-// API. Stateful stores are deliberately excluded — see below.
+    createFontRowSizeResolver,
-export * from './model/const/const';
+    FontNetworkError,
-export * from './model/types';
+    FontResponseError,
+    getFontUrl,
+} from './lib';
+export type { FontRowSizeResolverOptions } from './lib';
+
+export {
+    FontApplicator,
+    FontVirtualList,
+} from './ui';
+
+// Pure model surface (types + constants).
+export {
+    DEFAULT_FONT_SIZE,
+    DEFAULT_FONT_WEIGHT,
+    DEFAULT_LETTER_SPACING,
+    DEFAULT_LINE_HEIGHT,
+    FONT_SIZE_STEP,
+    FONT_WEIGHT_STEP,
+    LETTER_SPACING_STEP,
+    LINE_HEIGHT_STEP,
+    MAX_FONT_SIZE,
+    MAX_FONT_WEIGHT,
+    MAX_LETTER_SPACING,
+    MAX_LINE_HEIGHT,
+    MIN_FONT_SIZE,
+    MIN_FONT_WEIGHT,
+    MIN_LETTER_SPACING,
+    MIN_LINE_HEIGHT,
+    VIRTUAL_INDEX_NOT_LOADED,
+} from './model/const/const';
+export type {
+    FilterGroup,
+    FilterType,
+    FontCategory,
+    FontCollectionFilters,
+    FontCollectionSort,
+    FontCollectionState,
+    FontFeatures,
+    FontFilters,
+    FontLoadRequestConfig,
+    FontLoadStatus,
+    FontMetadata,
+    FontProvider,
+    FontStyleUrls,
+    FontSubset,
+    FontVariant,
+    FontWeight,
+    FontWeightItalic,
+    UnifiedFont,
+    UnifiedFontVariant,
+} from './model/types';
+
+/*
+ * Stores are exposed as lazy accessors / classes (not eager singletons): the
+ * entity's public API is complete, so consumers go through this barrel instead
+ * of deep-importing `./model` (FSD public-API boundary). Construction happens on
+ * first call, so this is inert at import. The slice root already transitively
+ * loads `@tanstack/query-core` via `./ui` (FontVirtualList), so surfacing the
+ * stores here adds no new eager cost.
+ */
+export {
+    FontLifecycleManager,
+    FontsByIdsStore,
+    getFontCatalog,
+    getFontLifecycleManager,
+} from './model';
+export type { FontCatalogStore } from './model';
 
 /*
  * `./api` (proxy clients: `fetchProxyFonts`, `seedFontCache`, …) is intentionally
- * NOT re-exported here. Those clients import `$shared/api/queryClient`, whose
+ * NOT re-exported here — those are not part of the entity's consumed surface and
- * module eval runs `new QueryClient()` and loads `@tanstack/query-core`. Funneling
+ * importing them eagerly constructs the TanStack `queryClient`. Import via the
- * them through this barrel made every consumer of `$entities/Font` — including
+ * segment: `import { fetchProxyFonts } from '$entities/Font/api'`.
- * pure-domain and type-only importers — eager-load TanStack and construct the
- * client (notably in unit specs). Import API clients via the segment:
- *   import { fetchProxyFonts } from '$entities/Font/api';
- */
-
-/*
- * Stores (`fontCatalogStore`, `fontLifecycleManager`, `FontsByIdsStore`) are
- * intentionally NOT re-exported here. They instantiate module-level singletons
- * and pull `@tanstack/query-core`, so funneling them through this barrel would
- * make every consumer of `$entities/Font` eager-instantiate stores (and break
- * tree-shaking / test init-order). Import them via the model segment:
- *   import { fontCatalogStore } from '$entities/Font/model';
  */
 
 // `./testing` is intentionally not re-exported: fixtures must not leak into the

src/entities/Font/model/index.ts

@@ -1,6 +1,51 @@
-export * from './const/const';
+export {
+    DEFAULT_FONT_SIZE,
+    DEFAULT_FONT_WEIGHT,
+    DEFAULT_LETTER_SPACING,
+    DEFAULT_LINE_HEIGHT,
+    FONT_SIZE_STEP,
+    FONT_WEIGHT_STEP,
+    LETTER_SPACING_STEP,
+    LINE_HEIGHT_STEP,
+    MAX_FONT_SIZE,
+    MAX_FONT_WEIGHT,
+    MAX_LETTER_SPACING,
+    MAX_LINE_HEIGHT,
+    MIN_FONT_SIZE,
+    MIN_FONT_WEIGHT,
+    MIN_LETTER_SPACING,
+    MIN_LINE_HEIGHT,
+    VIRTUAL_INDEX_NOT_LOADED,
+} from './const/const';
 
-export { getFontCatalog } from './store';
+// Stores (lazy accessors + classes)
+export {
+    __resetFontLifecycleManager,
+    FontLifecycleManager,
+    FontsByIdsStore,
+    getFontCatalog,
+    getFontLifecycleManager,
+} from './store';
+export type { FontCatalogStore } from './store';
 
-export * from './store';
+export type {
-export * from './types';
+    FilterGroup,
+    FilterType,
+    FontCategory,
+    FontCollectionFilters,
+    FontCollectionSort,
+    FontCollectionState,
+    FontFeatures,
+    FontFilters,
+    FontLoadRequestConfig,
+    FontLoadStatus,
+    FontMetadata,
+    FontProvider,
+    FontStyleUrls,
+    FontSubset,
+    FontVariant,
+    FontWeight,
+    FontWeightItalic,
+    UnifiedFont,
+    UnifiedFontVariant,
+} from './types';

src/entities/Font/model/store/index.ts

@@ -1,9 +1,12 @@
 // Font lifecycle manager (browser-side load + cache + eviction)
-export * from './fontLifecycleManager/fontLifecycleManager.svelte';
+export {
+    __resetFontLifecycleManager,
+    FontLifecycleManager,
+    getFontLifecycleManager,
+} from './fontLifecycleManager/fontLifecycleManager.svelte';
 
 // Paginated catalog
 export { getFontCatalog } from './fontCatalogStore/fontCatalogStore.svelte';
-
 export type { FontCatalogStore } from './fontCatalogStore/fontCatalogStore.svelte';
 
 // Batch fetch by IDs (detail-cache seeding)

src/entities/Font/model/types/index.ts

@@ -23,4 +23,7 @@ export type {
     FontCollectionState,
 } from './store';
 
-export * from './store/fontLifecycle';
+export type {
+    FontLoadRequestConfig,
+    FontLoadStatus,
+} from './store/fontLifecycle';

src/features/FilterAndSortFonts/model/store/bindings.svelte.ts

@@ -9,7 +9,7 @@
  * observer, so it lives at module scope, not in any individual widget.
  */
 
-import { getFontCatalog } from '$entities/Font/model';
+import { getFontCatalog } from '$entities/Font';
 import { untrack } from 'svelte';
 import { mapAppliedFiltersToParams } from '../../lib/mapper/mapAppliedFiltersToParams';
 import { mapFilterMetadataToGroups } from '../../lib/mapper/mapFilterMetadataToGroups';

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

@@ -13,18 +13,16 @@
  * - Slider position for character-by-character morphing
  */
 
-import {
-    type FontLoadRequestConfig,
-    type UnifiedFont,
-    getFontUrl,
-} from '$entities/Font';
 import {
     type FontCatalogStore,
     type FontLifecycleManager,
+    type FontLoadRequestConfig,
     FontsByIdsStore,
+    type UnifiedFont,
     getFontCatalog,
     getFontLifecycleManager,
-} from '$entities/Font/model';
+    getFontUrl,
+} from '$entities/Font';
 import {
     type TypographySettingsStore,
     getTypographySettingsStore,

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

@@ -9,11 +9,9 @@ import {
     FontVirtualList,
     type UnifiedFont,
     VIRTUAL_INDEX_NOT_LOADED,
-} from '$entities/Font';
-import {
     getFontCatalog,
     getFontLifecycleManager,
-} from '$entities/Font/model';
+} from '$entities/Font';
 import { getSkeletonWidth } from '$shared/lib/utils';
 import {
     Button,

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

@@ -8,11 +8,9 @@
 import {
     FontVirtualList,
     createFontRowSizeResolver,
-} from '$entities/Font';
-import {
     getFontCatalog,
     getFontLifecycleManager,
-} from '$entities/Font/model';
+} from '$entities/Font';
 import {
     TypographyMenu,
     getTypographySettingsStore,

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

@@ -3,7 +3,7 @@
     Wraps SampleList with a Section component
 -->
 <script lang="ts">
-import { getFontCatalog } from '$entities/Font/model';
+import { getFontCatalog } from '$entities/Font';
 import { NavigationWrapper } from '$features/Breadcrumb';
 import type { ResponsiveManager } from '$shared/lib';
 import { cn } from '$shared/lib';