feat: multimodal support (image) (#27793)

Co-authored-by: zxhlyh <jasonapring2015@outlook.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

web/i18n/zh-Hans/dataset-documents.ts

@@ -375,6 +375,7 @@ const translation = {
     answerEmpty: '答案不能为空',
     contentPlaceholder: '在这里添加内容',
     contentEmpty: '内容不能为空',
+    allFilesUploaded: '所有文件必须上传完成才能保存',
     newTextSegment: '新文本分段',
     newQaSegment: '新问答分段',
     addChunk: '新增分段',