feat(pages): 1:1 用户身份认证页 user-auth

Public apply/status shell on aksrt_user_verify_* meta, AJAX submit with
materials upload, admin approve promotes apply payload to auth info.

assets/js/user-auth-page.js

@@ -0,0 +1,64 @@
+/**
+ * User auth apply form AJAX.
+ *
+ * @package AKSRT
+ */
+(function () {
+  'use strict';
+
+  function ajaxUrl() {
+    if (window.aksrtData && window.aksrtData.ajaxUrl) return window.aksrtData.ajaxUrl;
+    return '/wp-admin/admin-ajax.php';
+  }
+
+  function toast(msg, type) {
+    if (window.aksrt && typeof window.aksrt.toast === 'function') {
+      window.aksrt.toast(msg, type || 'info');
+      return;
+    }
+    // eslint-disable-next-line no-alert
+    window.alert(msg);
+  }
+
+  function init() {
+    var form = document.querySelector('.aksrt-user-auth-form');
+    if (!form) return;
+
+    form.addEventListener('submit', function (e) {
+      e.preventDefault();
+      var btn = form.querySelector('button[type="submit"]');
+      if (btn) btn.disabled = true;
+      var fd = new FormData(form);
+      if (!fd.get('action')) fd.set('action', 'aksrt_user_auth_apply');
+
+      fetch(ajaxUrl(), {
+        method: 'POST',
+        body: fd,
+        credentials: 'same-origin',
+      })
+        .then(function (r) { return r.json(); })
+        .then(function (data) {
+          if (!data || data.error) {
+            toast((data && data.msg) || '提交失败', 'danger');
+            return;
+          }
+          toast(data.msg || '提交成功', 'success');
+          if (data.reload) {
+            window.setTimeout(function () { window.location.reload(); }, 500);
+          }
+        })
+        .catch(function () {
+          toast('网络错误', 'danger');
+        })
+        .finally(function () {
+          if (btn) btn.disabled = false;
+        });
+    });
+  }
+
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', init);
+  } else {
+    init();
+  }
+})();