fix(extensions): 内容审核管理端测试可绕过启用开关

后台测试此前受 content_audit_enabled/text_enabled 与 on_failure=allow 短路，未启用时恒为通过；强制 live 调用并返回可读失败原因。

assets/admin/src/pages/extensions/ExtensionSecurity.vue

@@ -235,10 +235,16 @@ async function handleTestIp() {
 
 async function handleTestAudit() {
   auditTest.value.loading = true
+  auditTest.value.result = ''
   try {
-    const res = await api.testContentAudit(auditTest.value.text)
-    auditTest.value.result = JSON.stringify(res?.data || {}, null, 2)
-    message.success('内容审核测试完成')
+    const res = await api.testContentAudit(String(auditTest.value.text || '').trim())
+    const data = res?.data || {}
+    auditTest.value.result = JSON.stringify(data, null, 2)
+    if (data.ok) {
+      message.success(data.message || '内容审核测试完成')
+    } else {
+      message.warning(data.message || '内容审核未通过或配置异常')
+    }
   } catch (err) {
     message.error(err?.message || '内容审核测试失败')
   } finally {