feat(user-center): deepen zibll parity and profile media

assets/js/author.js

@@ -199,9 +199,69 @@
     });
   }
 
+  function initAvatarUpload() {
+    var upload = (window.aksrtUserCenter || {}).avatarUpload;
+    if (!upload || !upload.enabled || !upload.restUrl) return;
+
+    var button = document.getElementById(upload.buttonId || 'aksrt-upload-avatar-btn');
+    var input = document.getElementById(upload.inputId || 'aksrt-avatar-file-input');
+    var image = document.getElementById(upload.imageId || 'aksrt-user-avatar-image');
+    if (!button || !input || button.dataset.aksrtAvatarBound === '1') return;
+    button.dataset.aksrtAvatarBound = '1';
+
+    var label = button.querySelector('span');
+    var idleText = upload.idleText || (label ? label.textContent : '更换头像');
+
+    function setBusy(busy) {
+      button.disabled = !!busy;
+      if (label) label.textContent = busy ? (upload.loadingText || '上传中…') : idleText;
+    }
+
+    button.addEventListener('click', function () { input.click(); });
+    input.addEventListener('change', function () {
+      var file = input.files && input.files[0];
+      if (!file) return;
+      if (upload.maxSize && file.size > upload.maxSize) {
+        notify(upload.tooLargeText || '图片大小不能超过 2MB', 'warning');
+        input.value = '';
+        return;
+      }
+
+      var body = new FormData();
+      body.append(upload.fieldName || 'avatar', file);
+      setBusy(true);
+      fetch(upload.restUrl, {
+        method: 'POST',
+        credentials: 'same-origin',
+        headers: { 'X-WP-Nonce': upload.restNonce || '' },
+        body: body
+      })
+        .then(function (response) {
+          return response.json().then(function (payload) {
+            if (!response.ok || !payload || !payload.success) throw payload || {};
+            return payload;
+          });
+        })
+        .then(function (payload) {
+          var url = payload.url || (payload.data && payload.data.url) || '';
+          if (!url) throw payload;
+          if (image) image.src = url;
+          notify(payload.message || upload.successText || '头像已更新', 'success');
+        })
+        .catch(function (error) {
+          notify((error && error.message) || upload.errorText || '上传失败', 'error');
+        })
+        .finally(function () {
+          setBusy(false);
+          input.value = '';
+        });
+    });
+  }
+
   function init() {
     initPublicDashboards();
     initCoverUpload();
+    initAvatarUpload();
   }
 
   if (document.readyState === 'loading') {