修复点位楼层跳转并优化模型加载缓存

src/utils/concurrency.ts

@@ -0,0 +1,20 @@
+export const mapWithConcurrency = async <T, R>(
+  items: T[],
+  concurrency: number,
+  mapper: (item: T, index: number) => Promise<R>
+): Promise<R[]> => {
+  const results: R[] = new Array(items.length)
+  const limit = Math.max(1, Math.floor(concurrency))
+  let nextIndex = 0
+
+  const workers = Array.from({ length: Math.min(limit, items.length) }, async () => {
+    while (nextIndex < items.length) {
+      const currentIndex = nextIndex
+      nextIndex += 1
+      results[currentIndex] = await mapper(items[currentIndex], currentIndex)
+    }
+  })
+
+  await Promise.all(workers)
+  return results
+}