调整PDF等待提示文案

frontend/src/views/AdminCertificates.vue

@@ -163,7 +163,7 @@ async function downloadCertificate(row: AdminCertificate) {
   downloadingCertificateId.value = row.id;
   const loading = ElLoading.service({
     lock: true,
-    text: "PDF正在排队或生成，请稍候...",
+    text: "当前查询人数较多，请稍后。。。",
     background: "rgba(255, 255, 255, 0.72)",
   });
   try {

frontend/src/views/CertificateQuery.vue

@@ -120,7 +120,7 @@
       </div>
       <div v-else-if="previewLoading" class="pdf-loading">
         <el-icon class="is-loading"><Loading /></el-icon>
-        <p>PDF正在排队或生成，请稍候...</p>
+        <p>当前查询人数较多，请稍后。。。</p>
       </div>
       <div v-else-if="current" class="preview-card">
         <p class="preview-kicker">Training Completion Certificate</p>
@@ -340,7 +340,7 @@ async function downloadPdf(item: PublicCertificate) {
   downloadingCertificateNo.value = item.certificate_no;
   const loading = ElLoading.service({
     lock: true,
-    text: "PDF正在排队或生成，请稍候...",
+    text: "当前查询人数较多，请稍后。。。",
     background: "rgba(255, 255, 255, 0.72)",
   });
   try {

frontend/src/views/CertificateView.vue

@@ -70,7 +70,7 @@ async function downloadPdf() {
   downloading.value = true;
   const loading = ElLoading.service({
     lock: true,
-    text: "PDF正在排队或生成，请稍候...",
+    text: "当前查询人数较多，请稍后。。。",
     background: "rgba(255, 255, 255, 0.72)",
   });
   try {