feat: 小程序前端显示分类标签

各页面增加垃圾信息分类标签显示：
- 检测结果页显示分类标签
- 批量识别页和CSV导出增加分类标签列
- 历史记录页显示分类标签
- 管理后台审核页显示分类标签

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

miniprogram/pages/admin-review/index.js

@@ -35,6 +35,13 @@ const APPEAL_STATUS_TEXT = {
   rejected: '已驳回'
 }
 
+const CATEGORY_LABELS = {
+  fraud: '疑似诈骗',
+  harassment: '疑似骚扰',
+  advertisement: '疑似广告',
+  spam: '疑似垃圾'
+}
+
 function buildPager(total, page, pageSize) {
   const totalValue = Number(total || 0)
   const totalPages = Math.max(Math.ceil(totalValue / pageSize), 1)
@@ -105,7 +112,8 @@ Page({
       created_text: (item.created_at || '').replace('T', ' ').slice(0, 19),
       review_status_text: REVIEW_STATUS_TEXT[item.manual_review_status] || item.manual_review_status,
       spam_probability_text: this.formatPercent(item.spam_probability, 2),
-      appeal_status_text: APPEAL_STATUS_TEXT[item.appeal_status] || item.appeal_status
+      appeal_status_text: APPEAL_STATUS_TEXT[item.appeal_status] || item.appeal_status,
+      category_label: CATEGORY_LABELS[item.category] || ''
     }))
   },
 
@@ -116,6 +124,7 @@ Page({
       ...item,
       created_text: (item.created_at || '').replace('T', ' ').slice(0, 19),
       appeal_status_text: APPEAL_STATUS_TEXT[item.appeal_status] || item.appeal_status,
+      category_label: CATEGORY_LABELS[item.category] || '',
       appeal_evidence_urls: (item.appeal_evidence_urls || []).map((url) =>
         url.startsWith('http') ? url : `${serverBase}${url}`
       )