fix(settings): add the sharing section icon to the placeholder map

src/components/settings/section-placeholder.tsx

@@ -20,6 +20,7 @@ import {
   LayoutDashboard,
   Link2,
   Settings2,
+  Share2,
   SlidersHorizontal,
   Sparkles,
   User,
@@ -39,6 +40,7 @@ const SLUG_ICON: Record<SettingsSectionSlug, LucideIcon> = {
   sources: Layers,
   ai: Sparkles,
   api: KeyRound,
+  sharing: Share2,
   export: Download,
   advanced: Settings2,
   about: Info,