feat: harden CMPP delivery and platform workflows

src/utils/fileUpload.ts

@@ -0,0 +1,16 @@
+export const IMAGE_UPLOAD_MAX_BYTES = 2 * 1024 * 1024;
+export const FILE_UPLOAD_MAX_BYTES = 10 * 1024 * 1024;
+
+const IMAGE_FILE_EXTENSION = /\.(?:avif|bmp|gif|heic|heif|jpe?g|png|svg|webp)$/i;
+
+export function isImageUpload(file: Pick<File, 'name' | 'type'>) {
+  return file.type.toLowerCase().startsWith('image/') || IMAGE_FILE_EXTENSION.test(file.name);
+}
+
+export function assertUploadFileSize(file: Pick<File, 'name' | 'size' | 'type'>) {
+  const image = isImageUpload(file);
+  const limit = image ? IMAGE_UPLOAD_MAX_BYTES : FILE_UPLOAD_MAX_BYTES;
+  if (file.size > limit) {
+    throw new Error(image ? '图片大小不能超过 2MB' : '文件大小不能超过 10MB');
+  }
+}