feat(FontVirtualList): move logic related to loading next batch of fonts to the FontVirtualContainer

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

@@ -3,7 +3,7 @@
     - Renders a virtualized list of fonts
     - Handles font registration with the manager
 -->
-<script lang="ts" generics="T extends UnifiedFont">
+<script lang="ts">
 import {
     Skeleton,
     VirtualList,
@@ -11,26 +11,23 @@ import {
 import type { ComponentProps } from 'svelte';
 import { fade } from 'svelte/transition';
 import { getFontUrl } from '../../lib';
-import type { FontConfigRequest } from '../../model';
 import {
+    type FontConfigRequest,
     type UnifiedFont,
     appliedFontsManager,
+    unifiedFontStore,
 } from '../../model';
 
 interface Props extends
     Omit<
-        ComponentProps<typeof VirtualList<T>>,
+        ComponentProps<typeof VirtualList<UnifiedFont>>,
-        'onVisibleItemsChange'
+        'items' | 'total' | 'isLoading' | 'onVisibleItemsChange' | 'onNearBottom'
     >
 {
     /**
      * Callback for when visible items change
      */
-    onVisibleItemsChange?: (items: T[]) => void;
+    onVisibleItemsChange?: (items: UnifiedFont[]) => void;
-    /**
-     * Callback for when near bottom is reached
-     */
-    onNearBottom?: (lastVisibleIndex: number) => void;
     /**
      * Weight of the font
      */
@@ -38,23 +35,20 @@ interface Props extends
      * Weight of the font
      */
     weight: number;
-    /**
-     * Whether the list is in a loading state
-     */
-    isLoading?: boolean;
 }
 
 let {
-    items,
     children,
     onVisibleItemsChange,
-    onNearBottom,
     weight,
-    isLoading = false,
     ...rest
 }: Props = $props();
 
-function handleInternalVisibleChange(visibleItems: T[]) {
+const isLoading = $derived(
+    unifiedFontStore.isFetching || unifiedFontStore.isLoading,
+);
+
+function handleInternalVisibleChange(visibleItems: UnifiedFont[]) {
     const configs: FontConfigRequest[] = [];
 
     visibleItems.forEach(item => {
@@ -77,9 +71,32 @@ function handleInternalVisibleChange(visibleItems: T[]) {
     // onVisibleItemsChange?.(visibleItems);
 }
 
-function handleNearBottom(lastVisibleIndex: number) {
+/**
-    // Forward the call to any external listener
+ * Load more fonts by moving to the next page
-    onNearBottom?.(lastVisibleIndex);
+ */
+function loadMore() {
+    if (
+        !unifiedFontStore.pagination.hasMore
+        || unifiedFontStore.isFetching
+    ) {
+        return;
+    }
+    unifiedFontStore.nextPage();
+}
+
+/**
+ * Handle scroll near bottom - auto-load next page
+ *
+ * Triggered by VirtualList when the user scrolls within 5 items of the end
+ * of the loaded items. Only fetches if there are more pages available.
+ */
+function handleNearBottom(_lastVisibleIndex: number) {
+    const { hasMore } = unifiedFontStore.pagination;
+
+    // VirtualList already checks if we're near the bottom of loaded items
+    if (hasMore && !unifiedFontStore.isFetching) {
+        loadMore();
+    }
 }
 </script>
 
@@ -99,10 +116,11 @@ function handleNearBottom(lastVisibleIndex: number) {
             </div>
         {:else}
             <VirtualList
-                {items}
+                items={unifiedFontStore.fonts}
-                {...rest}
+                total={unifiedFontStore.pagination.total}
                 onVisibleItemsChange={handleInternalVisibleChange}
                 onNearBottom={handleNearBottom}
+                {...rest}
             >
                 {#snippet children(scope)}
                     {@render children(scope)}

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

@@ -24,38 +24,6 @@ let innerHeight = $state(0);
 // Is the component above the middle of the viewport?
 let isAboveMiddle = $state(false);
 
-const isLoading = $derived(
-    unifiedFontStore.isFetching || unifiedFontStore.isLoading,
-);
-
-/**
- * Load more fonts by moving to the next page
- */
-function loadMore() {
-    if (
-        !unifiedFontStore.pagination.hasMore
-        || unifiedFontStore.isFetching
-    ) {
-        return;
-    }
-    unifiedFontStore.nextPage();
-}
-
-/**
- * Handle scroll near bottom - auto-load next page
- *
- * Triggered by VirtualList when the user scrolls within 5 items of the end
- * of the loaded items. Only fetches if there are more pages available.
- */
-function handleNearBottom(_lastVisibleIndex: number) {
-    const { hasMore } = unifiedFontStore.pagination;
-
-    // VirtualList already checks if we're near the bottom of loaded items
-    if (hasMore && !unifiedFontStore.isFetching) {
-        loadMore();
-    }
-}
-
 /**
  * Calculate display range for pagination info
  */
@@ -83,13 +51,9 @@ const checkPosition = throttle(() => {
 
 <div bind:this={wrapper}>
     <FontVirtualList
-        items={unifiedFontStore.fonts}
-        total={unifiedFontStore.pagination.total}
-        onNearBottom={handleNearBottom}
         itemHeight={220}
         useWindowScroll={true}
         weight={controlManager.weight}
-        {isLoading}
     >
         {#snippet children({
     item: font,