feat(profile): add comment notification preference toggle

Expose commentNotifyEnabled in profile page state, load it from /api/config/me with true fallback, and persist updates when saving profile settings.

Made-with: Cursor

app/pages/me/profile/index.vue

@@ -39,6 +39,7 @@ const state = reactive({
   linksJson: '[]',
   publicHomeHeaderTitle: '',
   publicHomeHeaderIconUrl: '',
+  commentNotifyEnabled: true,
 })
 
 const loading = ref(true)
@@ -195,6 +196,8 @@ async function load() {
     state.publicHomeHeaderTitle = typeof cfg.publicHomeHeaderTitle === 'string' ? cfg.publicHomeHeaderTitle : ''
     state.publicHomeHeaderIconUrl =
       typeof cfg.publicHomeHeaderIconUrl === 'string' ? cfg.publicHomeHeaderIconUrl : ''
+    state.commentNotifyEnabled =
+      typeof cfg.commentNotifyEnabled === 'boolean' ? cfg.commentNotifyEnabled : true
   } finally {
     loading.value = false
   }
@@ -239,6 +242,11 @@ async function save() {
         notify: false,
         body: { key: 'publicHomeHeaderIconUrl', value: state.publicHomeHeaderIconUrl },
       }),
+      fetchData('/api/config/me', {
+        method: 'PUT',
+        notify: false,
+        body: { key: 'commentNotifyEnabled', value: state.commentNotifyEnabled },
+      }),
     ])
     toast.add({ title: '资料已保存', color: 'success' })
     try {
@@ -305,6 +313,16 @@ async function save() {
           label="在发现卡片上显示上述地址"
         />
       </div>
+      <div class="space-y-2 rounded-lg border border-default bg-elevated/20 p-4">
+        <h2 class="text-sm font-semibold text-highlighted">
+          通知偏好
+        </h2>
+        <UCheckbox
+          v-model="state.commentNotifyEnabled"
+          label="收到新评论时发送邮件通知"
+          description="关闭后将不再接收评论相关邮件提醒。"
+        />
+      </div>
       <UFormField label="昵称" name="nickname">
         <UInput v-model="state.nickname" />
       </UFormField>