fix: 사업자번호 가져오기 기능 보강

src/pages/app/contractUpdate.vue

@@ -305,12 +305,20 @@ const showReasonError = computed(() =>
     (!completedPriceDataParams.reason || !completedPriceDataParams.reason.trim())
 )
 
-const estimateBizNoOptions = computed(() =>
-    completedPriceDataParams.estimates.map(est => ({
-      value: est.bizNo,
-      text: est.bizNo
-    }))
-)
+
+const estimateBizNoOptions = computed(() => {
+  if (completedPriceDataParams.compNm) {
+    return [{
+      value: completedPriceDataParams.bizNo,
+      text: completedPriceDataParams.bizNo
+    }]
+  }
+
+  return completedPriceDataParams.estimates.map(est => ({
+    value: est.bizNo,
+    text: est.bizNo
+  }))
+})
 
 function onBizNoChange() {
   const selected = completedPriceDataParams.estimates.find(est => est.bizNo === completedPriceDataParams.bizNo)