fix: 修复条件节点收起后分支连线丢失

- 在 tinyflow 条件节点收起态保留分支 handle，避免连线因 DOM 卸载消失

- 在节点折叠切换后刷新 xyflow 内部信息，确保连线锚点位置同步

easyflow-ui-admin/packages/tinyflow-ui/src/components/core/NodeWrapper.svelte

@@ -1,5 +1,12 @@
 <script lang="ts">
-  import {Handle, type NodeProps, NodeToolbar, Position, useSvelteFlow} from '@xyflow/svelte';
+  import {
+    Handle,
+    type NodeProps,
+    NodeToolbar,
+    Position,
+    useSvelteFlow,
+    useUpdateNodeInternals
+  } from '@xyflow/svelte';
   import {Button, Collapse, FloatingTrigger, Input, Textarea} from '../base';
   import {type Snippet} from 'svelte';
   import {useDeleteNode} from '../utils/useDeleteNode.svelte';
@@ -41,6 +48,7 @@
 
     let activeKeys = data.expand ? ['key'] : [];
     const { updateNodeData, getNode } = useSvelteFlow();
+    const updateNodeInternals = useUpdateNodeInternals();
 
     const items = $derived.by(() => {
         return [{
@@ -244,6 +252,7 @@
     <div class="tf-node-wrapper-body">
         <Collapse {items} activeKeys={activeKeys} onChange={(_,actionKeys) => {
             updateNodeData(id, {expand: actionKeys?.includes('key')})
+            updateNodeInternals(id);
             onCollapse?.(actionKeys?.includes('key') ? 'key' : '')
         }} />
     </div>