feat(web/m7-377): LikeButton gains size prop (sm/md/lg)

web/src/lib/components/LikeButton.svelte

@@ -4,8 +4,13 @@
 
   let {
     entityType,
-    entityId
-  }: { entityType: EntityKind; entityId: string } = $props();
+    entityId,
+    size = 'md'
+  }: { entityType: EntityKind; entityId: string; size?: 'sm' | 'md' | 'lg' } = $props();
+
+  const sizeClass = $derived(
+    size === 'sm' ? 'text-base' : size === 'lg' ? 'text-3xl' : 'text-lg'
+  );
 
   const SET_KEY = {
     track: 'track_ids',
@@ -39,5 +44,5 @@
   aria-label={liked ? 'Unlike' : 'Like'}
   aria-pressed={liked}
   onclick={onClick}
-  class="rounded p-1 {liked ? 'text-accent' : 'text-text-secondary hover:text-text-primary'}"
+  class="rounded p-1 {sizeClass} {liked ? 'text-accent' : 'text-text-secondary hover:text-text-primary'}"
 >{liked ? '♥' : '♡'}</button>