feat(fonts): implement Phase 4 - Update UI Components

- Replaced fontshareStore with unifiedFontStore in FontSearch.svelte
- Replaced fontshareStore with unifiedFontStore in SuggestedFonts.svelte
- Updated Font entity exports to include unifiedFontStore
- Updated model exports to include unified store exports
- Kept fontshareStore exports as deprecated for backward compatibility

Phase 4/7: Proxy API Integration for GlyphDiff

src/features/GetFonts/ui/SuggestedFonts/SuggestedFonts.svelte

@@ -6,11 +6,11 @@
 import {
     FontListItem,
     FontVirtualList,
-    fontshareStore,
+    unifiedFontStore,
 } from '$entities/Font';
 </script>
 
-<FontVirtualList items={fontshareStore.fonts}>
+<FontVirtualList items={unifiedFontStore.fonts}>
     {#snippet children({ item: font, isVisible, proximity })}
         <FontListItem {font} {isVisible} {proximity} />
     {/snippet}