수정: 티어 편집기 한글 아이템 검색 정규화

frontend/src/views/TierEditorView.vue

@@ -141,7 +141,7 @@ const copiedFromLabel = computed(() => {
   return parts.join(' · ') || '복사해 온 티어표'
 })
 const customItems = computed(() => getOrderedItems().filter((item) => item?.origin === 'custom'))
-const normalizedPoolSearchQuery = computed(() => poolSearchQuery.value.trim().toLowerCase())
+const normalizedPoolSearchQuery = computed(() => normalizeSearchText(poolSearchQuery.value))
 const hasSavedTierList = computed(() => !!(persistedTierListId.value || (tierListId.value && tierListId.value !== 'new')))
 const canRequestTemplateCreate = computed(
   () => canEdit.value && hasSavedTierList.value && templateId.value === 'freeform' && customItems.value.length > 0
@@ -164,6 +164,13 @@ watch(error, (message) => {
   error.value = ''
 })
 
+function normalizeSearchText(text) {
+  return String(text || '')
+    .normalize('NFC')
+    .trim()
+    .toLowerCase()
+}
+
 function createAutoTierListTitle() {
   const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
   const pick = (size) => Array.from({ length: size }, () => chars[Math.floor(Math.random() * chars.length)]).join('')
@@ -229,7 +236,7 @@ function isPoolItemVisible(itemId) {
   const query = normalizedPoolSearchQuery.value
   if (!query) return true
   const item = itemsById.value[itemId]
-  const label = String(item?.label || itemId || '').toLowerCase()
+  const label = normalizeSearchText(item?.label || itemId || '')
   return label.includes(query)
 }
 
@@ -618,6 +625,7 @@ function createColumnName(index = columns.value.length) {
 
 function createCustomItemLabel(fileName = '') {
   const normalized = String(fileName || '')
+    .normalize('NFC')
     .replace(/\.[^.]+$/, '')
     .replace(/[_-]+/g, ' ')
     .replace(/\s+/g, ' ')