feat: 扩展知识库文档上传限制至 100 MB

- 上传前校验单文件大小并给出本地化提示

- 同步支持格式与中英文说明

easyflow-ui-admin/app/src/components/upload/DragFileUpload.vue

@@ -4,6 +4,7 @@ import type { UploadProps } from 'element-plus';
 import { ref } from 'vue';
 
 import { useAppConfig } from '@easyflow/hooks';
+import { $t } from '@easyflow/locales';
 import { useAccessStore } from '@easyflow/stores';
 
 import { UploadFilled } from '@element-plus/icons-vue';
@@ -26,6 +27,8 @@ const props = defineProps({
 });
 
 const emit = defineEmits(['success', 'error', 'onChange']);
+const MAX_FILE_SIZE_BYTES = 100 * 1024 * 1024;
+const ACCEPTED_FILE_TYPES = '.txt,.pdf,.docx,.md,.pptx,.xlsx';
 const accessStore = useAccessStore();
 const headers = ref({
   'easyflow-token': accessStore.accessToken,
@@ -51,6 +54,14 @@ const handleError: UploadProps['onError'] = (error) => {
   emit('error', normalizedError);
 };
 
+const beforeUpload: UploadProps['beforeUpload'] = (rawFile) => {
+  if (rawFile.size <= MAX_FILE_SIZE_BYTES) {
+    return true;
+  }
+  ElMessage.warning($t('message.upload.fileTooLarge'));
+  return false;
+};
+
 // 文件状态变化回调
 const handleChange: UploadProps['onChange'] = (file, fileList) => {
   emit('onChange', file, fileList);
@@ -86,6 +97,8 @@ defineExpose({
     drag
     :headers="headers"
     :action="`${apiURL}${props.action}`"
+    :accept="ACCEPTED_FILE_TYPES"
+    :before-upload="beforeUpload"
     :on-success="handleSuccess"
     :on-error="handleError"
     :on-change="handleChange"
@@ -97,7 +110,7 @@ defineExpose({
     </ElIcon>
     <div class="flex flex-col gap-1">
       <span class="text-base">{{ $t('message.upload.title') }}</span>
-      <span class="text-sm text-[#75808d]">{{
+      <span class="text-muted-foreground text-sm">{{
         $t('message.upload.description')
       }}</span>
     </div>