Enhance batch management functionality by adding node flow execution support and improving batch configuration creation. Introduce new API endpoint for retrieving node flows and update existing batch services to handle execution types. Update frontend components to support new scheduling options and node flow selection.

frontend/components/dataflow/node-editor/NodeContextMenu.tsx

@@ -0,0 +1,67 @@
+"use client";
+
+import { useCallback, useEffect, useRef } from "react";
+import { Pencil, Copy, Trash2, Scissors } from "lucide-react";
+
+interface ContextMenuItem {
+  label: string;
+  icon: React.ReactNode;
+  onClick: () => void;
+  danger?: boolean;
+  disabled?: boolean;
+}
+
+interface NodeContextMenuProps {
+  x: number;
+  y: number;
+  items: ContextMenuItem[];
+  onClose: () => void;
+}
+
+export function NodeContextMenu({ x, y, items, onClose }: NodeContextMenuProps) {
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const handleClick = (e: MouseEvent) => {
+      if (ref.current && !ref.current.contains(e.target as Node)) {
+        onClose();
+      }
+    };
+    const handleEsc = (e: KeyboardEvent) => {
+      if (e.key === "Escape") onClose();
+    };
+    document.addEventListener("mousedown", handleClick);
+    document.addEventListener("keydown", handleEsc);
+    return () => {
+      document.removeEventListener("mousedown", handleClick);
+      document.removeEventListener("keydown", handleEsc);
+    };
+  }, [onClose]);
+
+  return (
+    <div
+      ref={ref}
+      className="fixed z-[200] min-w-[160px] rounded-lg border border-zinc-700 bg-zinc-900 py-1 shadow-xl shadow-black/40"
+      style={{ left: x, top: y }}
+    >
+      {items.map((item, i) => (
+        <button
+          key={i}
+          onClick={() => {
+            item.onClick();
+            onClose();
+          }}
+          disabled={item.disabled}
+          className={`flex w-full items-center gap-2.5 px-3 py-2 text-left text-xs transition-colors disabled:opacity-30 ${
+            item.danger
+              ? "text-pink-400 hover:bg-pink-500/10"
+              : "text-zinc-300 hover:bg-zinc-800"
+          }`}
+        >
+          {item.icon}
+          {item.label}
+        </button>
+      ))}
+    </div>
+  );
+}