fix: 修复长文档分页与滚动同步

apps/web/src/paged-break-token.ts

@@ -0,0 +1,15 @@
+const ELEMENT_NODE_TYPE = 1;
+
+export function resolveBreakTokenElement(
+  node: Node | undefined
+): Element | undefined {
+  if (!node) {
+    return undefined;
+  }
+
+  if (node.nodeType === ELEMENT_NODE_TYPE) {
+    return node as Element;
+  }
+
+  return node.parentElement ?? undefined;
+}