feat: enforce signature-scoped drainage authorization before SMS submission

src/apps/admin/sms-records/SendDetailModal.tsx

@@ -47,6 +47,26 @@ export function SendDetailModal({ record, segmentAudits, segmentLoading, onClose
       }
     >
       <div className="admin-sms-send-detail">
+        <section aria-label="引流发送资格">
+          <h3>引流发送资格</h3>
+          {record.drainageGate ? (
+            <>
+              <p>
+                {record.drainageGate.reason ||
+                  (record.drainageGate.targets.length
+                    ? '引流信息资格检查通过；发送仍受通道及其他规则限制'
+                    : '未检测到引流信息')}
+              </p>
+              {record.drainageGate.targets.map((target, index) => (
+                <p key={index}>
+                  {target.text} · {target.materialIds.length ? '已匹配审核通过的资料' : '未匹配有效资料'}
+                </p>
+              ))}
+            </>
+          ) : (
+            <p className="muted">{segmentLoading ? '正在加载引流资格校验结果…' : '未执行引流资格校验'}</p>
+          )}
+        </section>
         <div className="admin-sms-detail-overview">
           <div>
             <span>最终状态</span>