feat(user): add local avatar management flow

assets/js/author.js

@@ -206,6 +206,7 @@
     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');
+    var removeButton = document.getElementById(upload.removeButtonId || 'aksrt-remove-avatar-btn');
     if (!button || !input || button.dataset.aksrtAvatarBound === '1') return;
     button.dataset.aksrtAvatarBound = '1';
 
@@ -246,6 +247,7 @@
           var url = payload.url || (payload.data && payload.data.url) || '';
           if (!url) throw payload;
           if (image) image.src = url;
+          if (removeButton) removeButton.hidden = false;
           notify(payload.message || upload.successText || '头像已更新', 'success');
         })
         .catch(function (error) {
@@ -256,6 +258,40 @@
           input.value = '';
         });
     });
+
+    if (removeButton) {
+      var removeLabel = removeButton.querySelector('span');
+      var removeIdleText = upload.removeText || (removeLabel ? removeLabel.textContent : '恢复默认头像');
+      removeButton.addEventListener('click', function () {
+        if (!window.confirm(upload.confirmRemoveText || '确定恢复为默认头像？')) return;
+        removeButton.disabled = true;
+        if (removeLabel) removeLabel.textContent = upload.removingText || '恢复中…';
+
+        fetch(upload.restUrl, {
+          method: 'DELETE',
+          credentials: 'same-origin',
+          headers: { 'X-WP-Nonce': upload.restNonce || '' }
+        })
+          .then(function (response) {
+            return response.json().then(function (payload) {
+              if (!response.ok || !payload || !payload.success) throw payload || {};
+              return payload;
+            });
+          })
+          .then(function (payload) {
+            if (image && payload.url) image.src = payload.url;
+            removeButton.hidden = true;
+            notify(payload.message || upload.removeSuccessText || '已恢复默认头像', 'success');
+          })
+          .catch(function (error) {
+            notify((error && error.message) || upload.errorText || '头像操作失败', 'error');
+          })
+          .finally(function () {
+            removeButton.disabled = false;
+            if (removeLabel) removeLabel.textContent = removeIdleText;
+          });
+      });
+    }
   }
 
   function init() {