API시나리오 단계별 실행

src/main/resources/templates/layout/api_tester_layout.html

@@ -18,6 +18,14 @@
 
 <!-- csrf -->
 <input id="csrf" type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}">
+<div class="toast" role="alert" aria-live="assertive" aria-atomic="true" style="position: absolute; top: 0; right: 0;">
+    <div class="toast-header">
+        <strong class="mr-auto">알림</strong>
+        <button type="button" class="btn-close" data-bs-dismiss="toast" aria-label="Close"></button>
+    </div>
+    <div class="toast-body">
+    </div>
+</div>
 <div class="api-tester-layout">
     <div class="tester-toolbar">
         <button type="button" class="btn btn-primary btn-sm" id="toggle_tester">시나리오 보기</button>