fix(frontend): 禁止 disabled 状态下发送消息

- 恢复 PromptInputSubmit 的 disabled 绑定，避免按钮可点击提交
- 在 PromptInput handleSubmit 增加 disabled 兜底拦截
- 确保点击与回车两种路径在 disabled=true 时都不会发送

frontend/src/app/layout.tsx

@@ -8,8 +8,8 @@ import { I18nProvider } from "@/core/i18n/context";
 import { detectLocaleServer } from "@/core/i18n/server";
 
 export const metadata: Metadata = {
-  title: "DeerFlow",
-  description: "A LangChain-based framework for building super agents.",
+  title: "XClaw",
+  description: "Desscriptions of XClawDesscriptions of XClawDesscriptions of XClaw",
 };
 
 export default async function RootLayout({

frontend/src/components/ai-elements/prompt-input.tsx

@@ -752,6 +752,9 @@ export const PromptInput = ({
 
   const handleSubmit: FormEventHandler<HTMLFormElement> = (event) => {
     event.preventDefault();
+    if (disabled) {
+      return;
+    }
 
     const form = event.currentTarget;
     const text = usingProvider
@@ -1081,9 +1084,9 @@ export const PromptInputSubmit = ({
     : false;
 
   // 正在 streaming 时不允许发送
-  // const isStreaming = status === "streaming" || status === "submitted";
+  const isStreaming = status === "streaming" || status === "submitted";
 
-  // const isDisabled = disabled || !hasContent || isStreaming;
+  const isDisabled = disabled || !hasContent || isStreaming;
 
   let Icon = <ArrowUpIcon className="size-4" />;
 
@@ -1109,15 +1112,15 @@ export const PromptInputSubmit = ({
         // 被button{bgc:#fff}覆盖了，只能加"!"
         className={cn(
           "h-[40px] w-[140px] rounded-[10px] border-0 font-bold transition-all",
-          // isDisabled
-          //   ? "cursor-not-allowed !bg-gray-200 text-gray-400":
+          isDisabled
+            ? "cursor-not-allowed !bg-gray-200 text-gray-400":
           "!bg-[#F0E8FB] text-[#8E47F0] hover:!bg-[#8E47F0] hover:text-[#FFFFFF]",
           className,
         )}
         size={size}
         type="submit"
         variant={variant}
-        // disabled={isDisabled}
+        disabled={isDisabled}
         {...props}
       >
         {/* {children ?? Icon} */}

frontend/src/components/workspace/artifacts/artifact-file-detail.tsx

@@ -515,7 +515,7 @@ export function ArtifactFilePreview({
   if (language === "markdown") {
     return (
       <div
-        className={cn("w-full mb-[207px] p-[20px]")}
+        className={cn("w-full bg-white mb-[207px] p-[20px]")}
         style={{ "--zoom-scale": zoomScale } as React.CSSProperties}
       >
         <Streamdown