fix(ui): reserve scrollbar gutter in public TOC so it doesn't overlay text

app/public/assets/css/components/toc.css

@@ -126,6 +126,14 @@
 		max-height: calc(100vh - var(--space-xl) - var(--space-2xl));
 		overflow-y: auto;
 		overscroll-behavior: contain;
+		/* Reserve right gutter on the scroll container itself (padding, not
+		   margin) so the native scrollbar never overlays the TOC text. */
+		padding-right: var(--space-3xs);
+	}
+
+	/* Keep the caret/summary aligned with the reserved gutter */
+	.toc summary {
+		padding-right: var(--space-3xs);
 	}
 
 	.toc summary {