feat(character): 캐릭터 수정 API

- api url 수정

src/api/character.js

@@ -65,6 +65,7 @@ async function updateCharacter(characterData) {
 
   // 나머지 데이터는 JSON 문자열로 변환하여 request 필드에 추가
   const requestData = {
+    id: characterData.id,
     name: characterData.name,
     systemPrompt: characterData.systemPrompt,
     description: characterData.description,
@@ -87,7 +88,7 @@ async function updateCharacter(characterData) {
 
   formData.append('request', JSON.stringify(requestData))
 
-  return Vue.axios.put(`/api/admin/characters/${characterData.id}`, formData, {
+  return Vue.axios.put(`/admin/chat/character/update`, formData, {
     headers: {
       'Content-Type': 'multipart/form-data'
     }