v0.01: 修复死锁Bug + DNS-01默认 + 超时调整

frontend/src/views/CertCreate.vue

@@ -27,8 +27,8 @@
 
         <el-form-item label="验证方式" prop="challenge_type">
           <el-radio-group v-model="form.challenge_type" @change="onChallengeChange">
-            <el-radio value="http">HTTP-01（推荐）</el-radio>
-            <el-radio value="dns">DNS-01</el-radio>
+            <el-radio value="dns">DNS-01（推荐）</el-radio>
+            <el-radio value="http">HTTP-01（需80端口）</el-radio>
           </el-radio-group>
         </el-form-item>
 
@@ -100,7 +100,7 @@ const form = reactive({
   domain: '',
   email: '',
   provider: 'letsencrypt',
-  challenge_type: 'http',
+  challenge_type: 'dns',
   dns_provider: 'alidns',
   auto_renew: true,
   renew_days: 30,