fix：欢迎语置顶

src/pages/ChatTactics/TacticsChat.tsx

@@ -850,7 +850,7 @@ export const TacticsChat: React.FC = () => {
               }}
               className={`${styles.scrollable} scrollbar-hide scroll-smooth flex-1 overflow-y-auto px-[16px] min-h-0`}
             >
-              <div className={`${styles.inter} pt-[8px] pb-[24px]`}>
+              <div className={`${styles.inter} pt-[8px] pb-[24px] min-h-full`}>
                 {allItems.map((record, index) => {
                   const recordId = record.answerList?.[0]?.recordId || record.groupId
                   const uniqueKey = recordId