네비게이션 바 디자인 전환 기능 추가

src/main/java/com/eactive/apim/portal/common/breadcrumb/GlobalControllerAdvice.java

@@ -6,6 +6,7 @@ import javax.servlet.http.HttpServletRequest;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ModelAttribute;
+import com.eactive.apim.portal.portalproperty.service.PortalPropertyService;
 
 @ControllerAdvice
 public class GlobalControllerAdvice {
@@ -13,6 +14,9 @@ public class GlobalControllerAdvice {
     @Autowired
     private PageService pageService;
 
+    @Autowired
+    private PortalPropertyService portalPropertyService;
+
     @ModelAttribute("breadcrumb")
     public List<Map> addBreadcrumbToModel(HttpServletRequest request) {
         String currentPath = request.getRequestURI();
@@ -24,4 +28,15 @@ public class GlobalControllerAdvice {
         String currentPath = request.getRequestURI();
         return pageService.getPageName(currentPath);
     }
+
+    @ModelAttribute("designSurveyEnabled")
+    public boolean isDesignSurveyEnabled() {
+        String value = portalPropertyService.getOrCreateProperty(
+            "Portal",
+            "ui.design-survey",
+            "false",
+            "네비게이션 바 디자인 설문 활성화 여부 (true/false)"
+        );
+        return "true".equalsIgnoreCase(value);
+    }
 }

src/main/resources/static/css/main.css

@@ -628,6 +628,87 @@ hr {
   --shadow-xl: 0 16px 40px rgba(75, 155, 255, 0.2);
 }
 
+.design-survey-bar {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  height: 48px;
+  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
+  z-index: 400;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+}
+.design-survey-bar .survey-container {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+}
+.design-survey-bar .survey-label {
+  color: #ffffff;
+  font-size: 14px;
+  font-weight: 500;
+}
+.design-survey-bar .survey-buttons {
+  display: flex;
+  gap: 8px;
+}
+.design-survey-bar .survey-btn {
+  padding: 6px 16px;
+  border: 2px solid rgba(255, 255, 255, 0.5);
+  border-radius: 20px;
+  background: transparent;
+  color: #ffffff;
+  font-size: 14px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: all 0.3s ease;
+}
+.design-survey-bar .survey-btn:hover {
+  background: rgba(255, 255, 255, 0.2);
+  border-color: #ffffff;
+}
+.design-survey-bar .survey-btn.active {
+  background: #ffffff;
+  color: #667eea;
+  border-color: #ffffff;
+}
+@media (max-width: 768px) {
+  .design-survey-bar {
+    height: 40px;
+  }
+  .design-survey-bar .survey-label {
+    display: none;
+  }
+  .design-survey-bar .survey-btn {
+    padding: 4px 12px;
+    font-size: 12px;
+  }
+}
+
+body.design-survey-active .global-header {
+  margin-top: 48px;
+}
+@media (max-width: 768px) {
+  body.design-survey-active .global-header {
+    margin-top: 40px;
+  }
+}
+
+body.design-variant-B .logo-text {
+  font-size: 18px !important;
+}
+body.design-variant-B .nav-link {
+  margin: 0 20px !important;
+}
+
+body.design-variant-C .nav-link {
+  margin: 0 20px !important;
+  font-weight: bold !important;
+}
+
 .blind {
   position: absolute;
   width: 1px;

src/main/resources/static/sass/layout/_header.scss

@@ -29,6 +29,88 @@
   --shadow-xl: 0 16px 40px rgba(75, 155, 255, 0.2);
 }
 
+// ===========================
+// Design Survey Bar
+// ===========================
+.design-survey-bar {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  height: 48px;
+  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
+  z-index: 400;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+
+  .survey-container {
+    display: flex;
+    align-items: center;
+    gap: 16px;
+  }
+
+  .survey-label {
+    color: #ffffff;
+    font-size: 14px;
+    font-weight: 500;
+  }
+
+  .survey-buttons {
+    display: flex;
+    gap: 8px;
+  }
+
+  .survey-btn {
+    padding: 6px 16px;
+    border: 2px solid rgba(255, 255, 255, 0.5);
+    border-radius: 20px;
+    background: transparent;
+    color: #ffffff;
+    font-size: 14px;
+    font-weight: 600;
+    cursor: pointer;
+    transition: all 0.3s ease;
+
+    &:hover {
+      background: rgba(255, 255, 255, 0.2);
+      border-color: #ffffff;
+    }
+
+    &.active {
+      background: #ffffff;
+      color: #667eea;
+      border-color: #ffffff;
+    }
+  }
+
+  @media (max-width: 768px) {
+    height: 40px;
+    .survey-label { display: none; }
+    .survey-btn { padding: 4px 12px; font-size: 12px; }
+  }
+}
+
+// Body offset when survey is active
+body.design-survey-active {
+  .global-header { margin-top: 48px; }
+  @media (max-width: 768px) {
+    .global-header { margin-top: 40px; }
+  }
+}
+
+// Design Variant B
+body.design-variant-B {
+  .logo-text { font-size: 18px !important; }
+  .nav-link { margin: 0 20px !important; }
+}
+
+// Design Variant C
+body.design-variant-C {
+  .nav-link { margin: 0 20px !important; font-weight: bold !important; }
+}
+
 // Blind text for screen readers
 .blind {
   position: absolute;

src/main/resources/templates/views/fragment/kjbank/header_container.html

@@ -3,6 +3,18 @@
       xmlns:sec="http://www.thymeleaf.org/extras/spring-security">
 <body>
 <th:block th:fragment="headerFragment(headerClass)">
+  <!-- Design Survey Bar -->
+  <div th:if="${designSurveyEnabled}" class="design-survey-bar" id="designSurveyBar">
+    <div class="survey-container">
+      <span class="survey-label">네비게이션 디자인을 선택해주세요:</span>
+      <div class="survey-buttons">
+        <button type="button" class="survey-btn active" data-design="A">A (현재)</button>
+        <button type="button" class="survey-btn" data-design="B">B</button>
+        <button type="button" class="survey-btn" data-design="C">C</button>
+      </div>
+    </div>
+  </div>
+
   <!-- Global Header Container -->
   <header class="global-header" th:classappend="${headerClass}">
     <div class="container">
@@ -328,6 +340,36 @@
           });
         }
       });
+
+      // Design Survey
+      const surveyBar = document.getElementById('designSurveyBar');
+      if (surveyBar) {
+        const body = document.body;
+        const surveyButtons = surveyBar.querySelectorAll('.survey-btn');
+        const STORAGE_KEY = 'design-survey-selection';
+
+        body.classList.add('design-survey-active');
+
+        const savedDesign = localStorage.getItem(STORAGE_KEY) || 'A';
+        applyDesign(savedDesign);
+        surveyButtons.forEach(btn => {
+          btn.classList.toggle('active', btn.dataset.design === savedDesign);
+        });
+
+        surveyButtons.forEach(btn => {
+          btn.addEventListener('click', function() {
+            surveyButtons.forEach(b => b.classList.remove('active'));
+            this.classList.add('active');
+            applyDesign(this.dataset.design);
+            localStorage.setItem(STORAGE_KEY, this.dataset.design);
+          });
+        });
+
+        function applyDesign(design) {
+          body.classList.remove('design-variant-B', 'design-variant-C');
+          if (design !== 'A') body.classList.add('design-variant-' + design);
+        }
+      }
     });
   </script>
 </th:block>