fix(canvas): 画布批量生成 - 修复节点丢失、资源引用及刷新状态不一致

web/src/lib/canvas/canvas-generation-result.ts

@@ -0,0 +1,32 @@
+import type { CanvasNodeData, CanvasNodeMetadata } from "@/types/canvas";
+
+/** 异步阶段只准备结果；提交时按节点身份合并，绝不能用旧文档覆盖当前文档。 */
+export function commitCanvasGenerationResult(current: CanvasNodeData[], before: CanvasNodeData, result: CanvasNodeData, taskId: string): CanvasNodeData[] {
+    const live = current.find((node) => node.id === before.id);
+    if (!live) throw new Error("生成结果对应节点已删除，结果仍保留在任务中心");
+    if (result.id !== before.id || (live.metadata?.taskId && live.metadata.taskId !== taskId) || (before.metadata?.taskId && !live.metadata?.taskId)) {
+        throw new Error("节点已绑定其他生成任务，旧任务结果不能覆盖当前节点");
+    }
+    const metadata: CanvasNodeMetadata = { ...live.metadata };
+    for (const key of new Set([...Object.keys(before.metadata || {}), ...Object.keys(result.metadata || {})]) as Set<keyof CanvasNodeMetadata>) {
+        if (JSON.stringify(before.metadata?.[key]) === JSON.stringify(result.metadata?.[key])) continue;
+        Object.assign(metadata, { [key]: result.metadata?.[key] });
+    }
+    const geometryChanged = live.width !== before.width || live.height !== before.height || live.metadata?.manualSize;
+    const moved = live.position.x !== before.position.x || live.position.y !== before.position.y;
+    const merged: CanvasNodeData = {
+        ...live,
+        type: result.type === before.type ? live.type : result.type,
+        title: result.title === before.title || live.title !== before.title ? live.title : result.title,
+        width: geometryChanged ? live.width : result.width,
+        height: geometryChanged ? live.height : result.height,
+        position: moved || geometryChanged ? live.position : result.position,
+        metadata,
+    };
+    const versionRootId = merged.metadata?.versionOfNodeId;
+    return current.map((node) => {
+        if (node.id === merged.id) return versionRootId ? { ...merged, metadata: { ...merged.metadata, versionPrimary: true } } : merged;
+        if (!versionRootId || (node.metadata?.versionOfNodeId || node.id) !== versionRootId) return node;
+        return { ...node, metadata: { ...node.metadata, versionPrimary: false } };
+    });
+}