修复 R7E 真机反馈回流与移动入口 WF8-11A R7E-16A R7E-16B BIZ8-12A

client/src/lib/pdfFiles.ts

@@ -0,0 +1,22 @@
+export const PDF_FILE_ACCEPT = ".pdf,application/pdf";
+
+export function isPdfFile(file: File) {
+  return file.type === "application/pdf" || file.name.toLowerCase().endsWith(".pdf");
+}
+
+export function splitPdfFiles(files: File[] | FileList | null | undefined) {
+  const source = Array.from(files ?? []);
+  return {
+    accepted: source.filter(isPdfFile),
+    rejected: source.filter((file) => !isPdfFile(file)),
+  };
+}
+
+export function rejectedPdfMessage(rejected: File[]) {
+  if (!rejected.length) {
+    return "";
+  }
+  const names = rejected.slice(0, 3).map((file) => file.name || "未命名文件").join("、");
+  const suffix = rejected.length > 3 ? `等 ${rejected.length} 个文件` : "";
+  return `发票上传仅支持 PDF，已忽略 ${names}${suffix}。`;
+}