feat(openvpn): suggest available OIDC ports and add deployment assets

frontend/src/views/TunnelEditor.vue

@@ -162,6 +162,7 @@ async function save() {
     for (const key of ['oidc_issuer', 'oidc_client_id', 'oidc_base_url', ...(originalAuthMode.value === 'oidc' ? [] : ['oidc_client_secret'])]) {
       if (!form.value.config[key]) return ElMessage.warning(t('oidcGuide.fillRequired'))
     }
+    if (!form.value.config.oidc_http_port) return ElMessage.warning(t('oidcGuide.portLookupFailed'))
   }
   trafficMode.value = trafficMode.value
   if (isOpenVPN.value && routeListRef.value && !routeListRef.value.validate()) return