feat: 优化工作流参数编辑与告警交互

- 新增 ParamTokenEditor，支持参数选择插入、token 高亮、整段删除与光标避让

- 参数候选改为动态监测，未映射参数可选择并在下拉与输入框顶部告警

- 接入知识库/搜索引擎/LLM/动态代码/HTTP Body 及 SQL、查询数据自定义节点

- 优化 Http 节点布局并补充参数解析工具与单测

easyflow-ui-admin/packages/tinyflow-ui/src/components/nodes/SearchEngineNode.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import NodeWrapper from '../core/NodeWrapper.svelte';
-  import {type NodeProps, useSvelteFlow} from '@xyflow/svelte';
-  import {Button, Heading, Input, Select} from '../base';
+  import {type NodeProps, useNodesData, useSvelteFlow} from '@xyflow/svelte';
+  import {Button, Heading, Select} from '../base';
   import RefParameterList from '../core/RefParameterList.svelte';
   import {getCurrentNodeId} from '#components/utils/NodeUtils';
   import {useAddParameter} from '../utils/useAddParameter.svelte';
@@ -9,6 +9,7 @@
   import {onMount} from 'svelte';
   import OutputDefList from '../core/OutputDefList.svelte';
   import type {SelectItem} from '#types';
+  import ParamTokenEditor from '../core/ParamTokenEditor.svelte';
 
   const { data, ...rest }: {
         data: NodeProps['data'],
@@ -16,7 +17,11 @@
     } = $props();
 
     const currentNodeId = getCurrentNodeId();
+    let currentNode = useNodesData(currentNodeId);
     const { addParameter } = useAddParameter();
+    const editorParameters = $derived.by(() => {
+        return (currentNode?.current?.data?.parameters as Array<any>) || data.parameters || [];
+    });
 
     const options = getOptions();
 
@@ -99,9 +104,13 @@
 
     <div class="setting-title">关键字</div>
     <div class="setting-item">
-        <Input placeholder="请输入关键字" style="width: 100%"
-               value={data.keyword}
-               onchange={(e)=>{
+        <ParamTokenEditor
+               mode="input"
+               placeholder="请输入关键字"
+               style="width: 100%"
+               parameters={editorParameters}
+               value={data.keyword || ''}
+               oninput={(e)=>{
             const newValue = e.target.value;
             updateNodeData(currentNodeId, ()=>{
                 return {
@@ -114,15 +123,21 @@
 
     <div class="setting-title">搜索数据量</div>
     <div class="setting-item">
-        <Input placeholder="搜索的数据条数" style="width: 100%" value={data.limit}
-               onchange={(e)=>{
+        <ParamTokenEditor
+               mode="input"
+               placeholder="搜索的数据条数"
+               style="width: 100%"
+               value={data.limit || ''}
+               parameters={editorParameters}
+               oninput={(e)=>{
             const newValue = e.target.value;
             updateNodeData(currentNodeId, ()=>{
                 return {
                     limit: newValue
                 }
             })
-        }} />
+        }}
+        />
     </div>
 
 
@@ -156,5 +171,3 @@
 
 </style>
 
-
-