fix: make confirm dialog fully opaque with solid background

Replace bg-card with bg-background/100, upgrade shadow to 2xl, and
remove backdrop-blur on the dialog content to ensure maximum visibility.

src/components/admin/confirm-dialog.tsx

@@ -89,7 +89,7 @@ export function ConfirmDialog({
 						aria-modal="true"
 						aria-labelledby="confirm-dialog-title"
 						aria-describedby="confirm-dialog-desc"
-						className="relative z-10 w-full max-w-md rounded-lg border bg-card p-6 text-card-foreground shadow-xl ring-1 ring-black/5"
+						className="relative z-10 w-full max-w-md rounded-lg border border-border bg-background/100 p-6 text-card-foreground shadow-2xl ring-1 ring-black/10 backdrop-blur-none"
 						variants={modalContentVariants}
 						initial="hidden"
 						animate="visible"