fix: 修复license未认证的情况下，按回车键可以登录的问题

(cherry picked from commit 4e0eb3f143)

src/Login.vue

@@ -33,13 +33,13 @@
               @click="login"
               @keyup.enter="login"
               style="font-size: 16px;"
-            >Login</el-button
-          >
+          >Login
+          </el-button>
         </el-form-item>
         <el-form-item v-if="licenseStatus !== 0">
           <div class="license-error-msg">{{licenseStatusErrMsg}}</div>
           <div class="license-file">
-            <button style="position: relative;" class="license__btn margin-r-20" @click.prevent="downloadFile">
+            <button style="position: relative;" class="license__btn margin-r-20" @click.prevent="downloadFile" @keyup.enter="login">
               <i class="cn-icon-download1 cn-icon margin-r-6"></i><span>Download c2v file</span>
             </button>
             <el-upload :action="`${baseUrl}sys/license/upload`"
@@ -101,6 +101,9 @@ export default {
       } else {
         return
       }
+      if (this.licenseStatus !== 0) {
+        return
+      }
       this.loading = true
       axios.post(api.login, { username: this.username, pin: this.pin }).then(
         res => {