fix(sxwz): 修复制品面板打开时输入框布局偏移

仅在制品面板关闭时应用 SXWZ 品牌的 -translate-x-[172px] 偏移，
避免面板打开时输入框被推出可视区域。

frontend/src/app/workspace/chats/[thread_id]/page.tsx

@@ -579,7 +579,7 @@ export default function ChatPage() {
             className={cn(
               "pointer-events-auto relative w-full max-w-[720px]",
               showWelcomeStyle && "-translate-y-[calc(50vh-96px)]",
-              brand === "sxwz" && "-translate-x-[172px]"
+              brand === "sxwz"&& artifactsOpen ===false && "-translate-x-[172px]"
             )}
           >
             {!(showWelcomeStyle && thread.isThreadLoading) ? (