refactor(web): migrate feature screens to design tokens + radius token (#49)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/components/delete-confirm-dialog.tsx

@@ -47,7 +47,7 @@ export function DeleteConfirmDialog({
     <AlertDialog open={open} onOpenChange={setOpen}>
       <AlertDialogTrigger
         render={
-          <Button variant="ghost" size="sm" className="text-red-600">
+          <Button variant="ghost" size="sm" className="text-destructive">
             {triggerLabel ?? t("actions.delete")}
           </Button>
         }
@@ -56,7 +56,7 @@ export function DeleteConfirmDialog({
         <AlertDialogTitle>{t("actions.delete")}</AlertDialogTitle>
         <AlertDialogDescription>{description}</AlertDialogDescription>
         {message && (
-          <p role="alert" className="text-sm text-red-600">
+          <p role="alert" className="text-sm text-destructive">
             {message}
           </p>
         )}