feat: replace Dialog component with ConfirmActionDialog for improved confirmation handling

frontend/src/components/ui/confirm-action-dialog.tsx

@@ -0,0 +1,71 @@
+import type { ReactNode } from "react";
+
+import { Button, type ButtonProps } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+
+type ConfirmActionDialogProps = {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  title: string;
+  description: ReactNode;
+  onConfirm: () => void;
+  isConfirming: boolean;
+  errorMessage?: string | null;
+  confirmLabel?: string;
+  confirmingLabel?: string;
+  cancelLabel?: string;
+  cancelVariant?: NonNullable<ButtonProps["variant"]>;
+  errorStyle?: "text" | "panel";
+  ariaLabel?: string;
+};
+
+export function ConfirmActionDialog({
+  open,
+  onOpenChange,
+  title,
+  description,
+  onConfirm,
+  isConfirming,
+  errorMessage,
+  confirmLabel = "Delete",
+  confirmingLabel = "Deleting…",
+  cancelLabel = "Cancel",
+  cancelVariant = "outline",
+  errorStyle = "panel",
+  ariaLabel,
+}: ConfirmActionDialogProps) {
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent aria-label={ariaLabel}>
+        <DialogHeader>
+          <DialogTitle>{title}</DialogTitle>
+          <DialogDescription>{description}</DialogDescription>
+        </DialogHeader>
+        {errorMessage ? (
+          errorStyle === "text" ? (
+            <p className="text-sm text-red-500">{errorMessage}</p>
+          ) : (
+            <div className="rounded-lg border border-[color:var(--border)] bg-[color:var(--surface-muted)] p-3 text-xs text-muted">
+              {errorMessage}
+            </div>
+          )
+        ) : null}
+        <DialogFooter>
+          <Button variant={cancelVariant} onClick={() => onOpenChange(false)}>
+            {cancelLabel}
+          </Button>
+          <Button onClick={onConfirm} disabled={isConfirming}>
+            {isConfirming ? confirmingLabel : confirmLabel}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}