实现报销材料连续预览（07-27-yang-jun-reimbursement-readiness）

client/src/lib/wecomFilePreview.ts

@@ -24,7 +24,7 @@ async function configuredWecomSdk() {
         }
         ww.register({
           corpId: config.corpId,
-          jsApiList: ["previewFile"],
+          jsApiList: ["previewFile", "previewImage"],
           async getConfigSignature(url) {
             const signed = await fetchWecomJsSdkSignature(url || currentPageUrl());
             return {
@@ -58,6 +58,19 @@ export async function previewFileInWecom(file: NativePreviewFile) {
   return true;
 }
 
+export async function previewImagesInWecom(urls: string[], current = urls[0]) {
+  if (!isWecomWebView()) {
+    return false;
+  }
+  const normalized = urls.map((url) => url.trim()).filter(Boolean);
+  if (!normalized.length || !current || !normalized.includes(current)) {
+    throw new Error("图片预览信息不完整");
+  }
+  const ww = await configuredWecomSdk();
+  await ww.previewImage({ current, urls: normalized });
+  return true;
+}
+
 export function openFileInBrowser(url: string) {
   window.open(url, "_blank", "noopener,noreferrer");
 }