fix(fe): refine sidebar section toggle to avoid unnecessary page re-navigation

frontend/src/shared/shell/KsSidebar.vue

@@ -102,15 +102,12 @@ watch(() => route.path, (newPath) => {
 
 const isActive = (path: string) => route.path === path
 
-const toggleSection = (itemId: string, defaultPath?: string) => {
+const toggleSection = (itemId: string) => {
   if (expandedSections.value.has(itemId)) {
     expandedSections.value.delete(itemId)
   } else {
     expandedSections.value.add(itemId)
   }
-  if (defaultPath) {
-    router.push(defaultPath)
-  }
 }
 
 const isSectionExpanded = (itemId: string) => expandedSections.value.has(itemId)
@@ -160,7 +157,7 @@ const sidebarClass = computed(() => ({
             },
           ]"
           :title="item.label"
-          @click="item.children ? toggleSection(item.id, item.path) : handleMenuClick(item.path)"
+          @click="item.children ? toggleSection(item.id) : handleMenuClick(item.path)"
         >
           <span class="ks-sidebar__icon">{{ item.icon }}</span>
           <span class="ks-sidebar__label">{{ item.label }}</span>