实现企微原生材料预览（07-27-yang-jun-reimbursement-readiness）

client/src/api/auth.ts

@@ -99,6 +99,20 @@ export async function fetchWecomConfig() {
   return apiRequestData<WecomEntryConfig>("/api/auth/wecom/config", { auth: false });
 }
 
+export type WecomJsSdkSignature = {
+  corpId: string;
+  timestamp: number;
+  nonceStr: string;
+  signature: string;
+};
+
+export async function fetchWecomJsSdkSignature(url: string) {
+  return apiRequestData<WecomJsSdkSignature>("/api/auth/wecom/js-sdk-signature", {
+    method: "POST",
+    body: JSON.stringify({ url }),
+  });
+}
+
 export async function startWecomBind(returnTo = "/settings/profile") {
   return apiRequestData<{ loginUrl: string }>("/api/auth/wecom/bind", {
     method: "POST",