fix(web): share app chat support statement

web/src/views/ApplicationConfig/Agent.tsx

@@ -2,7 +2,7 @@
  * @Author: ZhaoYing 
  * @Date: 2026-02-03 16:29:21 
  * @Last Modified by: ZhaoYing
- * @Last Modified time: 2026-03-31 16:50:10
+ * @Last Modified time: 2026-04-07 18:04:49
  */
 import { useEffect, useRef, useState, forwardRef, useImperativeHandle, useMemo } from 'react';
 import { useTranslation } from 'react-i18next'
@@ -354,6 +354,25 @@ const Agent = forwardRef<AgentRef, { onFeaturesLoad?: (features: FeaturesConfigF
 
   const handleSaveFeaturesConfig = (value: FeaturesConfigForm) => {
     form.setFieldValue('features', value)
+    const { statement = '' } = value?.opening_statement || {}
+    onFeaturesLoad?.(value)
+
+    const usedVars = [...new Set([...(statement?.matchAll(/\{\{(\w+)\}\}/g) ?? [])].map(m => m[1]))]
+    const variables = values?.variables
+    const validNames = new Set(variables.map(v => v.name))
+    const invalid = usedVars.filter(v => !validNames.has(v))
+    if (invalid.length > 0) {
+      const newVars = invalid.map((name, i) => ({
+        index: variables.length + i,
+        name,
+        display_name: name,
+        type: 'text',
+        required: true,
+        max_length: 48,
+      }))
+
+      form.setFieldValue('variables', [...variables, ...newVars])
+    }
   }
   const modelLogo = useMemo(() => {
     return defaultModel?.name && getListLogoUrl(defaultModel.provider, defaultModel.logo as string)
@@ -385,7 +404,8 @@ const Agent = forwardRef<AgentRef, { onFeaturesLoad?: (features: FeaturesConfigF
           if (vo.list?.length === 0) {
             return { ...vo, list: [assistantMsg] }
           } else if (vo.list && vo.list[0].role === 'assistant') {
-            return { ...vo, list: [assistantMsg, ...vo.list.slice(1)] }
+            vo.list[0] = assistantMsg
+            return { ...vo, list: [...vo.list] }
           } else {
             return { ...vo, list: [assistantMsg, ...(vo.list || [])] }
           }