更新公众号未选账号时「添加视频」的提示文案。

说明选公众号后会为其推荐匹配的优质视频，减少合作方困惑。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/views/publishContent/weGZH/components/publishPlanModal/index.tsx

@@ -106,7 +106,7 @@ const AddPunlishPlanModal: React.FC<AddPunlishPlanModalProps> = ({ visible, isSu
 
 	const openVideoSelector = () => {
 		if (!accountId) {
-			message.warning('请先选择公众号');
+			message.warning('请先选择公众号，为您推荐适合该公众号的优质视频');
 			return;
 		}
 		setIsVideoSelectVisible(true);