feat: support var in suggested questions (#17340)

Co-authored-by: crazywoola <427733928@qq.com>

web/app/components/base/chat/chat/hooks.ts

@@ -83,12 +83,11 @@ export const useChat = (
     const ret = [...threadMessages]
     if (config?.opening_statement) {
       const index = threadMessages.findIndex(item => item.isOpeningStatement)
-
       if (index > -1) {
         ret[index] = {
           ...ret[index],
           content: getIntroduction(config.opening_statement),
-          suggestedQuestions: config.suggested_questions,
+          suggestedQuestions: config.suggested_questions?.map(item => getIntroduction(item)),
         }
       }
       else {
@@ -97,7 +96,7 @@ export const useChat = (
           content: getIntroduction(config.opening_statement),
           isAnswer: true,
           isOpeningStatement: true,
-          suggestedQuestions: config.suggested_questions,
+          suggestedQuestions: config.suggested_questions?.map(item => getIntroduction(item)),
         })
       }
     }

web/app/components/base/features/new-feature-panel/conversation-opener/modal.tsx

@@ -130,6 +130,7 @@ const OpeningSettingModal = ({
                 <input
                   type="input"
                   value={question || ''}
+                  placeholder={t('appDebug.openingStatement.openingQuestionPlaceholder') as string}
                   onChange={(e) => {
                     const value = e.target.value
                     setTempSuggestedQuestions(tempSuggestedQuestions.map((item, i) => {