feat(canvas): 画布工作台 - 新增生成副本并修复大型画布性能、素材同步与删除校验

统一图片与视频副本的生成落点并保留参考连接。\n优化大型画布节点虚拟化、媒体懒加载、拖拽与详情进入路径。\n修复素材主版本 ID 同步及删除时的画布独立引用校验。

web/src/pages/canvas/canvas-image-generation-executor.ts

@@ -50,9 +50,8 @@ export async function executeImageGeneration({
     const count = getGenerationCount(generationConfig.count);
     const isConfigNode = sourceNode?.type === CanvasNodeType.Config;
     const isImageNode = sourceNode?.type === CanvasNodeType.Image;
-    const isCopiedVariant = count === 1 && isImageNode && Boolean(sourceNode?.metadata?.copiedFromNodeId || sourceNode?.metadata?.versionOfNodeId || sourceNode?.title.endsWith(" Copy") || sourceNode?.title.includes(" · "));
-    const reuseSourceNode = canGenerateImageInPlace(sourceNode) || isCopiedVariant;
-    const directCopiedBatch = count > 1 && isImageNode && Boolean(sourceNode?.metadata?.content) && (Boolean(sourceNode?.metadata?.copiedFromNodeId) || sourceNode?.title.endsWith(" Copy"));
+    const reuseSourceNode = canGenerateImageInPlace(sourceNode);
+    const directCopiedBatch = count > 1 && isImageNode && Boolean(sourceNode?.metadata?.content) && reuseSourceNode;
     // 已有图片生成新结果并保留旧版本；参考图只来自入边，避免把旧结果误当成自身输入。
     const referenceImages = generationContext.referenceImages;
     const generationType = referenceImages.length ? ("edit" as const) : ("generation" as const);
@@ -289,4 +288,3 @@ export async function executeImageGeneration({
         return next;
     });
 }
-