feat(FontListItem): separate isVisible flags into two (partial and fully)

src/entities/Font/ui/FontListItem/FontListItem.svelte

@@ -19,7 +19,11 @@ interface Props {
     /**
      * Is element fully visible
      */
-    isVisible: boolean;
+    isFullyVisible: boolean;
+    /**
+     * Is element partially visible
+     */
+    isPartiallyVisible: boolean;
     /**
      * From 0 to 1
      */
@@ -30,7 +34,7 @@ interface Props {
     children: Snippet<[font: UnifiedFont]>;
 }
 
-const { font, isVisible, proximity, children }: Props = $props();
+const { font, isFullyVisible, isPartiallyVisible, proximity, children }: Props = $props();
 
 const selected = $derived(selectedFontsStore.has(font.id));
 let timeoutId = $state<NodeJS.Timeout | null>(null);
@@ -49,7 +53,7 @@ const bloom = new Spring(0, {
 
 // Sync spring to proximity for a "Lens" effect
 $effect(() => {
-    bloom.target = isVisible ? 1 : 0;
+    bloom.target = isPartiallyVisible ? 1 : 0;
 });
 
 $effect(() => {