fix(sandbox): xlsx/avi 等不可预览文件走兜底 (#6754)

projects/app/src/pageComponents/chat/SandboxEditor/Editor.tsx

@@ -81,19 +81,29 @@ const SandboxEditor = ({ appId, chatId, outLinkAuthData }: Props) => {
   // 初始加载根目录的 loading 状态
   const [loadingRoot, setLoadingRoot] = useState(false);
 
-  // 读取文件内容 - 根据 language 来决定解码策略
+  // 读取文件内容 - 根据 language 决定解码策略
+  // - 媒体（image/audio/video）→ blob URL
+  // - 其他 → 严格 UTF-8 解码；解不出来视为不可预览（如 xlsx/zip 等真二进制）
   const { runAsync: loadFile, loading: loadingFile } = useRequest(
-    async (filePath: string, language: string): Promise<string> => {
+    async (
+      filePath: string,
+      language: string
+    ): Promise<{ content: string; isUnknown: boolean }> => {
       const response = await getSandboxFile({ appId, chatId, outLinkAuthData, path: filePath });
 
       const isBinary = getIsBinaryByLanguage(language);
 
       if (isBinary) {
         const blob = await response.blob();
-        return URL.createObjectURL(blob);
-      } else {
-        const content = await response.text();
-        return content;
+        return { content: URL.createObjectURL(blob), isUnknown: false };
+      }
+
+      const buffer = await response.arrayBuffer();
+      try {
+        const content = new TextDecoder('utf-8', { fatal: true }).decode(buffer);
+        return { content, isUnknown: false };
+      } catch {
+        return { content: '', isUnknown: true };
       }
     },
     { manual: true }
@@ -106,7 +116,7 @@ const SandboxEditor = ({ appId, chatId, outLinkAuthData }: Props) => {
       if (!targetPath) return;
 
       const targetFile = openedFiles.find((f) => f.path === targetPath);
-      if (!targetFile || targetFile.isBinary) return;
+      if (!targetFile || targetFile.isBinary || targetFile.isUnknown) return;
 
       await writeSandboxFile({
         appId,
@@ -160,7 +170,7 @@ const SandboxEditor = ({ appId, chatId, outLinkAuthData }: Props) => {
       const language = getLanguageByFileName(fileName);
       const isBinary = getIsBinaryByLanguage(language);
 
-      const content = await loadFile(filePath, language);
+      const { content, isUnknown } = await loadFile(filePath, language);
 
       const newFile: OpenedFile = {
         path: filePath,
@@ -168,7 +178,8 @@ const SandboxEditor = ({ appId, chatId, outLinkAuthData }: Props) => {
         content,
         language,
         isBinary,
-        isDirty: false
+        isDirty: false,
+        isUnknown
       };
 
       setOpenedFiles((prev) => [...prev, newFile]);
@@ -214,7 +225,7 @@ const SandboxEditor = ({ appId, chatId, outLinkAuthData }: Props) => {
   // 当切换 tab 时,更新编辑器内容
   useEffect(() => {
     if (!editorRef.current || !activeFilePath || !activeFile) return;
-    if (activeFile.isBinary) return;
+    if (activeFile.isBinary || activeFile.isUnknown) return;
 
     // 使用 ref 标记防止循环更新
     isUpdatingRef.current = true;

projects/app/src/pageComponents/chat/SandboxEditor/components/EditorContent.tsx

@@ -88,6 +88,11 @@ const EditorContent = ({
   const renderFileContent = () => {
     if (!activeFile) return null;
 
+    // 非媒体文件 UTF-8 解码失败 → 走兜底（如 xlsx/zip 等真二进制）
+    if (activeFile.isUnknown) {
+      return t('chat:sandbox_binary_file_no_preview');
+    }
+
     // 二进制文件预览 (图片/音频/视频)
     if (activeFile.isBinary) {
       const { language, content, name } = activeFile;

projects/app/src/pageComponents/chat/SandboxEditor/components/FileTabs.tsx

@@ -10,6 +10,8 @@ export type OpenedFile = {
   language: string;
   isBinary: boolean;
   isDirty: boolean;
+  // 非媒体文件 UTF-8 解码失败时为 true，前端走「无法预览」兜底
+  isUnknown?: boolean;
 };
 
 type Props = {

projects/app/src/pageComponents/chat/SandboxEditor/utils.tsx

@@ -80,7 +80,8 @@ const extensionToLang: Record<string, string[]> = {
   svg: ['svg'],
   pdf: ['pdf'],
   audio: ['mp3', 'wav', 'm4a', 'flac', 'ogg'],
-  video: ['avi', 'mp4', 'webm', 'mov', 'm4v']
+  // 仅保留浏览器 <video> 原生可解码的容器；avi/mkv/wmv/flv/mov/m4v 等走兜底
+  video: ['mp4', 'webm']
 };
 
 const langMap = Object.entries(extensionToLang).reduce(