fix(liveRoom): 修复当前价格为 0 时的显示逻辑

- 在显示当前价格为 0 的条件下，增加了对 nowPrice 是否存在的判断
- 优化了代码逻辑，提高了组件的健壮性

app/pages/signature/protocol/index.vue

@@ -1,6 +1,7 @@
 <script setup>
 import pdfView from './pdfView'
 import { contractView } from "~/api/goods/index.js"
+import { signOnline } from "~/api/goods/index.js"
 import { authStore } from "~/stores/auth/index.js"
 import {useI18n} from "vue-i18n";
 
@@ -45,11 +46,25 @@ const handleCollapseChange = (name) => {
   }
 }
 
-const goSignature = () => {
+const goSignature = async () => {
+  const res = await signOnline({
+    auctionArtworkUuid:payment.value.auctionArtworkUuid
+  })
+  if (res.status===0){
+    if(res.data.signType==='fdd'){
+      window.location.href = res.data.fddVerifyUrl
+    }else{
       router.push({
         path: '/signature/panel'
       })
     }
+  
+  }
+  console.log('goSignature')
+  // router.push({
+  //   path: '/signature/panel'
+  // })
+}
 </script>
 
 <template>