管理员免登录直接评论：后台会话映射站主身份（免审核、不可被禁言）+ 评论作者字段对齐后端 user

- 公开 API 解析顺序：读者 cookie → 管理员 cookie（provider=admin 站主读者，名字取站点作者名）
- 站主发评论跳过禁言与审核；后台禁言接口拒绝站主身份
- CommentItem 读 c.author 改为 c.user（后端实际字段），站主徽章按 provider 判断

frontend/src/components/comments/CommentItem.vue

@@ -25,14 +25,14 @@ const props = defineProps({
 const s = props.api.s
 const EDIT_WINDOW_MS = 10 * 60 * 1000
 
-const name = computed(() => (props.c.author && props.c.author.name) || '已注销用户')
+const name = computed(() => (props.c.user && props.c.user.name) || '已注销用户')
 const relativeTime = computed(() => relativeDate(props.c.created_at))
-const isOwner = computed(() => !!(props.c.author && props.c.author.is_owner))
-const isMine = computed(() => !!(reader.user && props.c.author && reader.user.id === props.c.author.id))
+const isOwner = computed(() => !!(props.c.user && props.c.user.provider === 'admin'))
+const isMine = computed(() => !!(reader.user && props.c.user && reader.user.id === props.c.user.id))
 
 // 外链：优先作者自填的 url，其次 GitHub 主页
 const authorHref = computed(() => {
-  const a = props.c.author
+  const a = props.c.user
   if (!a) return ''
   if (a.url) return a.url
   if (a.provider === 'github' && a.handle) return `https://github.com/${a.handle}`
@@ -41,12 +41,11 @@ const authorHref = computed(() => {
 
 const canEdit = computed(() => {
   if (props.c.is_deleted) return false
-  if (isOwner.value) return true
   if (!isMine.value) return false
   const t = new Date(props.c.created_at).getTime()
   return Number.isFinite(t) && Date.now() - t <= EDIT_WINDOW_MS
 })
-const canDelete = computed(() => !props.c.is_deleted && (isMine.value || isOwner.value))
+const canDelete = computed(() => !props.c.is_deleted && isMine.value)
 
 const replying = computed(() => s.replyTo && s.replyTo.id === props.c.id)
 const editing = computed(() => s.editing && s.editing.id === props.c.id)
@@ -118,7 +117,7 @@ const atInline = computed(
 function replyNameOf(r) {
   if (!r.parent_id || r.parent_id === props.c.id) return ''
   const t = (props.c.replies || []).find((x) => x.id === r.parent_id)
-  return t ? (t.author && t.author.name) || '' : ''
+  return t ? (t.user && t.user.name) || '' : ''
 }
 </script>
 
@@ -126,15 +125,15 @@ function replyNameOf(r) {
   <li class="cm-item" :class="{ 'is-deleted': c.is_deleted, 'is-reply': depth > 0 }">
     <div class="cm-av" :class="{ 'is-owner': isOwner }">
       <img
-        v-if="c.author && c.author.avatar_url"
-        :src="c.author.avatar_url"
+        v-if="c.user && c.user.avatar_url"
+        :src="c.user.avatar_url"
         :alt="`${name} 的头像`"
         loading="lazy"
       >
       <span v-else class="cm-av-fb">{{ name.slice(0, 1) }}</span>
-      <i v-if="c.author && c.author.provider" class="cm-pv" :title="PROVIDER_LABEL[c.author.provider] || c.author.provider">
-        <svg v-if="BRANDS[c.author.provider]" viewBox="0 0 24 24" aria-hidden="true">
-          <path :d="BRANDS[c.author.provider]" />
+      <i v-if="c.user && c.user.provider" class="cm-pv" :title="PROVIDER_LABEL[c.user.provider] || c.user.provider">
+        <svg v-if="BRANDS[c.user.provider]" viewBox="0 0 24 24" aria-hidden="true">
+          <path :d="BRANDS[c.user.provider]" />
         </svg>
       </i>
     </div>