feat: 관리자 수동 이미지 대체 기능 추가

frontend/src/composables/useAdminCustomItems.js

@@ -16,6 +16,11 @@ export function useAdminCustomItems({
   customItemModalDraftLabel,
   customItemModalLabelSaving,
   customItemModalTargetTemplateId,
+  customItemReplacementQuery,
+  customItemReplacementItems,
+  customItemReplacementLoading,
+  customItemReplacementTargetId,
+  customItemReplacementBusy,
   templates,
   selectedTemplateId,
   refreshCustomItems,
@@ -56,12 +61,41 @@ export function useAdminCustomItems({
     customItemModalHistoryActive.value = true
   }
 
+  async function refreshReplacementCandidates() {
+    const currentItemId = modalTargetCustomItem.value?.id || ''
+    if (!currentItemId) {
+      customItemReplacementItems.value = []
+      return
+    }
+
+    try {
+      customItemReplacementLoading.value = true
+      const data = await api.listAdminCustomItems({
+        q: customItemReplacementQuery.value,
+        page: 1,
+        limit: 50,
+        filter: 'all',
+      })
+      customItemReplacementItems.value = (data.items || []).filter((item) => item?.id && item.id !== currentItemId)
+    } catch (e) {
+      error.value = '대체할 이미지 목록을 불러오지 못했어요.'
+      customItemReplacementItems.value = []
+    } finally {
+      customItemReplacementLoading.value = false
+    }
+  }
+
   function openCustomItemModal(item) {
     modalTargetCustomItem.value = item || null
     customItemModalDraftLabel.value = item?.label || ''
     customItemModalTargetTemplateId.value = ''
+    customItemReplacementQuery.value = item?.label || ''
+    customItemReplacementItems.value = []
+    customItemReplacementTargetId.value = ''
+    customItemReplacementBusy.value = false
     customItemModalOpen.value = true
     pushCustomItemModalHistoryState()
+    void refreshReplacementCandidates()
   }
 
   function closeCustomItemModal({ fromPopState = false } = {}) {
@@ -71,6 +105,11 @@ export function useAdminCustomItems({
     customItemModalDraftLabel.value = ''
     customItemModalLabelSaving.value = false
     customItemModalTargetTemplateId.value = ''
+    customItemReplacementQuery.value = ''
+    customItemReplacementItems.value = []
+    customItemReplacementTargetId.value = ''
+    customItemReplacementLoading.value = false
+    customItemReplacementBusy.value = false
 
     if (fromPopState) {
       customItemModalHistoryActive.value = false
@@ -190,6 +229,35 @@ export function useAdminCustomItems({
     }
   }
 
+  async function replaceCustomItem(item = modalTargetCustomItem.value) {
+    resetMessages()
+    const targetItem = customItemReplacementItems.value.find((entry) => entry.id === customItemReplacementTargetId.value)
+    if (!item?.id) {
+      error.value = '대체할 원본 아이템을 찾지 못했어요.'
+      return
+    }
+    if (!targetItem?.id) {
+      error.value = '대체할 대상 이미지를 먼저 선택해주세요.'
+      return
+    }
+
+    try {
+      customItemReplacementBusy.value = true
+      const data = await api.replaceAdminCustomItem(item.id, {
+        targetItemId: targetItem.id,
+        targetSourceType: targetItem.sourceType || 'user',
+      })
+      if (selectedTemplateId.value) await loadTemplate()
+      await refreshCustomItems()
+      closeCustomItemModal()
+      success.value = `"${item.label}" 이미지를 "${data.targetItem?.label || targetItem.label}" 기준으로 대체했어요.`
+    } catch (e) {
+      error.value = e?.status === 409 ? '같은 이미지/이름으로는 대체할 수 없어요.' : '이미지 대체에 실패했어요.'
+    } finally {
+      customItemReplacementBusy.value = false
+    }
+  }
+
   return {
     submitCustomItemSearch,
     changeCustomItemFilter,
@@ -205,5 +273,7 @@ export function useAdminCustomItems({
     removeUnusedCustomItems,
     saveCustomItemModalLabel,
     promoteCustomItem,
+    refreshReplacementCandidates,
+    replaceCustomItem,
   }
 }