feat(l2_review): 添加“待确认”状态支持

@@ -631,6 +631,7 @@
       <label for="decisionFilter">类型</label>
       <select id="decisionFilter">
         <option value="pending" selected>待审核</option>
+        <option value="unsure">待确认</option>
         <option value="">全部</option>
         <option value="l1_hit">L1 命中</option>
         <option value="conflict">L1/L2 冲突</option>

@@ -361,13 +361,16 @@ def _staging_groups_response(
         where_clauses.append("s.biz_review_status IN ('approved_import', 'rejected_duplicate', 'deleted')")
         where_clauses.append("s.staging_status = 'imported'")
     elif decision == 'pending':
-        where_clauses.append("(s.biz_review_status IS NULL OR s.biz_review_status IN ('pending', 'unsure'))")
+        where_clauses.append("(s.biz_review_status IS NULL OR s.biz_review_status = 'pending')")
         where_clauses.append("s.dedup_action = 'review'")
         where_clauses.append("s.staging_status <> 'imported'")
         where_clauses.append(
             "(s.review_claim_expires_at IS NULL OR s.review_claim_expires_at <= NOW() OR s.review_claim_token = %s)"
         )
         params.append(client_token)
+    elif decision == 'unsure':
+        where_clauses.append("s.biz_review_status = 'unsure'")
+        where_clauses.append("s.staging_status <> 'imported'")
     # 兼容旧的 dedup_action 筛选
     elif decision and decision in ('merge', 'review'):
         where_clauses.append("s.dedup_action = %s")