Fix OG image API crash and dropdown opacity

src/app/dashboard/page.tsx

@@ -132,7 +132,7 @@ export default function DashboardPage() {
               {downloading ? 'Generating...' : 'Share Card'}
             </Button>
             {shareMenuOpen && (
-              <div className="absolute right-0 top-full mt-2 w-48 bg-card border border-border rounded-xl shadow-xl z-50 overflow-hidden animate-in fade-in zoom-in-95 duration-200">
+              <div className="absolute right-0 top-full mt-2 w-48 bg-white dark:bg-zinc-950 border border-border rounded-xl shadow-xl z-50 overflow-hidden animate-in fade-in zoom-in-95 duration-200">
                 <button onClick={handleShareFacebook} className="flex items-center w-full px-4 py-3 text-sm hover:bg-secondary text-left transition-colors">
                   <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" className="mr-3 text-blue-600"><path d="M18 2h-3a5 5 0 0 0-5 5v3H7v4h3v8h4v-8h3l1-4h-4V7a1 1 0 0 1 1-1h3z"></path></svg>
                   Share on Facebook