speculative fix for vault view refresh from empty to having tokens

src/components/Vault.vue

@@ -96,7 +96,7 @@ const balances = computed(()=>{
   console.log('balances', addr.value, s.vaultBalances, bs)
   return bs || {}
 })
-const empty = computed(()=>Object.keys(balances.value).length===0)
+const empty = computed(()=>Object.values(balances.value).length===0)
 const exists = computed(()=>s.vaults.length>0)
 
 const withdrawToken = ref(null)