Fix canvas transfer timeouts and move images out of snapshots

src/components/canvas/material-node.tsx

@@ -2,7 +2,7 @@
 import { managedImageSource } from "@/lib/canvas-v2";
 
 import { useContext, useRef } from "react";
-import { Handle, Position, type NodeProps } from "@xyflow/react";
+import { Handle, Position, useViewport, type NodeProps } from "@xyflow/react";
 import { FileText, Image as ImageIcon, Type } from "lucide-react";
 import { elementCapabilities } from "@/lib/canvas-elements";
 import { nodeDirections, type CanvasNode } from "@/lib/canvas";
@@ -18,13 +18,15 @@ const labels = { top: "上方", right: "右侧", bottom: "下方", left: "左侧
 export function MaterialNode(props: NodeProps<CanvasNode>) {
   const { id, data, selected } = props;
   const editing = useContext(NodeEditing);
+  const { zoom } = useViewport();
+  const preview = (props.width || 260) * zoom * (typeof window === "undefined" ? 1 : window.devicePixelRatio || 1) <= 1024;
   const pointerStart = useRef({ x: 0, y: 0 });
   const Icon = data.kind === "image" ? ImageIcon : data.kind === "script" ? FileText : Type;
   return (
     <TransformableNode {...props} className={`${styles.node} ${selected ? styles.selectedNode : ""}`}>
       <header className={styles.nodeHeading}><Icon size={13} /><NodeTitle id={id} title={data.title} selected={selected} /></header>
       <Handle type="target" position={Position.Left} className={styles.legacyHandle} isConnectable={false} />
-      {data.kind === "image" ? <img className={styles.image} src={managedImageSource(data.src)} alt={data.title} draggable={false} referrerPolicy="no-referrer" /> : (
+      {data.kind === "image" ? <img className={styles.image} src={managedImageSource(data.src, preview)} alt={data.title} draggable={false} referrerPolicy="no-referrer" /> : (
         <CanvasTextEditor id={id} data={data} selected={selected} />
       )}
       <Handle type="source" position={Position.Right} className={styles.legacyHandle} isConnectable={false} />