🐛 [Bug]: tiny-grid 默认配置jsslot，useCanvas未执行generateNodesMap（导致无法选中）

[whateveryoudo]

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What is expected

// 6. 如果新节点有子节点，递归构建 nodeMap if (Array.isArray(newNodeData?.children) && newNodeData.children.length > 0) { const newNode = getNode(newNodeData.id) generateNodesMap(newNodeData.children, newNode) } 如果我tiny-grid默认配置了slot但是children是空的就不会执行，（另外是否可以把 handleTinyGridColumnsSlots 方法给出来）

What is actually happening

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Title: 🐛 [Bug]: tiny-grid default configuration jsslot, useCanvas does not execute generateNodesMap (cause it cannot be selected)