fix: [sms] API URL을 Blade route() 헬퍼로 변경 및 에러 상세 표시

- 하드코딩 URL → route() 기반으로 환경별 자동 대응
- 422 에러 시 validation 에러 메시지 상세 표시

resources/views/barobill/sms/send/index.blade.php

@@ -106,6 +106,11 @@
 
 @push('scripts')
 <script>
+const SMS_API = {
+    send: '{{ route('api.admin.barobill.sms.send') }}',
+    fromNumbers: '{{ route('api.admin.barobill.sms.from-numbers') }}',
+    sendState: '{{ route('api.admin.barobill.sms.send-state', ['sendKey' => '__KEY__']) }}',
+};
 function fillTestData() {
     document.querySelector('input[name="to_name"]').value = '김보곤';
     document.querySelector('input[name="to_number"]').value = '01051238210';
@@ -146,7 +151,7 @@ function loadFromNumbers() {
 
     area.innerHTML = '<div class="flex items-center gap-2 text-sm text-gray-500"><svg class="w-4 h-4 animate-spin" fill="none" viewBox="0 0 24 24"><circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle><path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"></path></svg> 발신번호 목록 로딩 중...</div>';
 
-    fetch('/api/admin/barobill/sms/from-numbers', {
+    fetch(SMS_API.fromNumbers, {
         headers: { 'Accept': 'application/json', 'X-Requested-With': 'XMLHttpRequest' }
     })
     .then(r => r.json())
@@ -227,7 +232,7 @@ function checkSendState(sendKey) {
     const stateArea = document.getElementById('send-state-result');
     stateArea.innerHTML = '<div class="text-sm text-gray-500">상태 조회 중...</div>';
 
-    fetch('/api/admin/barobill/sms/send-state/' + encodeURIComponent(sendKey), {
+    fetch(SMS_API.sendState.replace('__KEY__', encodeURIComponent(sendKey)), {
         headers: { 'Accept': 'application/json', 'X-Requested-With': 'XMLHttpRequest' }
     })
     .then(r => r.json())
@@ -270,7 +275,7 @@ function checkSendState(sendKey) {
     btn.disabled = true;
     btn.textContent = '발송 중...';
 
-    fetch('/api/admin/barobill/sms/send', {
+    fetch(SMS_API.send, {
         method: 'POST',
         headers: {
             'Content-Type': 'application/json',
@@ -280,7 +285,14 @@ function checkSendState(sendKey) {
         },
         body: JSON.stringify(body),
     })
-    .then(r => r.json())
+    .then(async r => {
+        const data = await r.json();
+        if (!r.ok && data.errors) {
+            data.success = false;
+            data.error = Object.values(data.errors).flat().join('\n');
+        }
+        return data;
+    })
     .then(data => {
         btn.disabled = false;
         btn.innerHTML = '<svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 19l9 2-9-18-9 18 9-2zm0 0v-8" /></svg> SMS 발송';