feat(component): add comment quote with ref tag

src/components/CommentSection.vue

@@ -31,6 +31,31 @@ const readonlyFields = computed(() => isLoggedIn.value)
 const authorName = ref('')
 const authorEmail = ref('')
 const content = ref('')
+const quotedComment = ref<CommentResponse | null>(null)
+
+function escapeBrackets(text: string): string {
+  return text.replace(/[<>]/g, (ch) => '\\' + ch)
+}
+
+function renderCommentContent(text: string): string {
+  const escaped = text
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+  return escaped.replace(/&lt;ref:(\d+)&gt;/g, '<span class="comment-ref-tag">&lt;ref:$1&gt;</span>')
+}
+
+function quoteExcerpt(comment: CommentResponse): string {
+  const s = (comment.content ?? '').replace(/\s+/g, ' ').trim()
+  return s.length > 40 ? s.slice(0, 40) + '…' : s
+}
+
+function quoteComment(comment: CommentResponse) {
+  quotedComment.value = comment
+  if (!formOpen.value) {
+    openForm()
+  }
+}
 
 const sortedComments = computed(() =>
   [...comments.value].sort(
@@ -69,14 +94,19 @@ async function onSubmit() {
   error.value = null
   submitMessage.value = null
   try {
+    let body = escapeBrackets(content.value.trim())
+    if (quotedComment.value?.id != null) {
+      body = `<ref:${quotedComment.value.id}>${body}`
+    }
     await commentApi.apiArticlesSlugCommentsPost(props.slug, {
       authorName: authorName.value.trim(),
       authorEmail: authorEmail.value.trim() || undefined,
-      content: content.value.trim()
+      content: body
     })
     content.value = ''
     authorName.value = ''
     authorEmail.value = ''
+    quotedComment.value = null
     submitMessage.value = '评论已提交，等待审核'
     formOpen.value = false
     load()
@@ -161,7 +191,13 @@ onMounted(() => {
             <span class="comment-author">{{ comment.authorName }}</span>
             <span class="comment-time">{{ formatDate(comment.createdAt) }}</span>
           </div>
-          <p class="comment-content">{{ comment.content }}</p>
+          <p class="comment-content" v-html="renderCommentContent(comment.content ?? '')"></p>
+          <button class="comment-quote" type="button" title="引用评论" @click="quoteComment(comment)">
+            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="14" height="14" fill="currentColor" aria-hidden="true">
+              <path d="M10 7L8 12h3v5H5v-5l2-5h3zm9 0l-2 5h3v5h-6v-5l2-5h3z" />
+            </svg>
+            <span>引用</span>
+          </button>
           <button class="comment-star" :class="{ starred: comment.hasStarred }" @click="toggleCommentStar(comment)">
             <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="14" height="14">
               <path d="M12 2l3.09 6.26L22 9.27l-5 4.87 1.18 6.88L12 17.77l-6.18 3.25L7 14.14 2 9.27l6.91-1.01L12 2z" fill="currentColor"/>
@@ -193,6 +229,12 @@ onMounted(() => {
           <p v-if="error" class="error-text">{{ error }}</p>
           <SongInput v-model="authorName" label="昵称" required placeholder="你的署名" :maxlength="100" :readonly="readonlyFields" :disabled="readonlyFields" />
           <SongInput v-model="authorEmail" label="邮箱（可选）" type="email" placeholder="用于联系，不公开" :readonly="readonlyFields" :disabled="readonlyFields" />
+          <div v-if="quotedComment" class="quote-preview">
+            <span class="quote-preview-label">引用</span>
+            <span class="quote-preview-author">{{ quotedComment.authorName }}</span>
+            <span class="quote-preview-text">{{ quoteExcerpt(quotedComment) }}</span>
+            <button class="quote-preview-clear" type="button" title="取消引用" aria-label="取消引用" @click="quotedComment = null">✕</button>
+          </div>
           <SongInput v-model="content" label="内容" textarea :rows="4" required placeholder="写下你的评语..." :maxlength="2000" />
           <div class="comment-form-actions">
             <SongButton type="text" size="small" @click="formOpen = false">止</SongButton>
@@ -330,6 +372,87 @@ onMounted(() => {
   color: var(--ac-danger-ink);
 }
 
+.comment-quote {
+  display: inline-flex;
+  align-items: center;
+  gap: 3px;
+  margin-left: 8px;
+  border: none;
+  background: none;
+  color: var(--ac-text-disabled);
+  cursor: pointer;
+  font-size: 12px;
+  padding: 2px 6px;
+  border-radius: var(--song-radius-s);
+  transition: color var(--song-dur-1) var(--song-ease);
+}
+
+.comment-quote:hover {
+  color: var(--ac-primary-ink);
+}
+
+.comment-ref-tag {
+  display: inline-block;
+  padding: 0 6px;
+  margin-right: 4px;
+  border: 1px solid var(--ac-primary);
+  border-radius: var(--song-radius-s);
+  color: var(--ac-primary-ink);
+  background: var(--ac-primary-bg);
+  font-size: 12px;
+  line-height: 18px;
+}
+
+.quote-preview {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 10px;
+  margin: 4px 0;
+  border: 1px solid var(--ac-border);
+  border-left: 3px solid var(--ac-primary);
+  border-radius: var(--song-radius-m);
+  background: var(--ac-primary-bg);
+  font-size: 13px;
+}
+
+.quote-preview-label {
+  flex-shrink: 0;
+  color: var(--ac-primary-ink);
+  font-weight: 600;
+}
+
+.quote-preview-author {
+  flex-shrink: 0;
+  color: var(--ac-text-secondary);
+}
+
+.quote-preview-text {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  color: var(--ac-text);
+}
+
+.quote-preview-clear {
+  flex-shrink: 0;
+  border: none;
+  background: none;
+  color: var(--ac-text-disabled);
+  cursor: pointer;
+  font-size: 12px;
+  line-height: 1;
+  padding: 2px;
+  border-radius: var(--song-radius-s);
+  transition: color var(--song-dur-1) var(--song-ease);
+}
+
+.quote-preview-clear:hover {
+  color: var(--ac-danger-ink);
+}
+
 .comment-write {
   margin-top: 8px;
   display: flex;