fix: use proxied api routes in frontend

src/views/MapEditor.ts

@@ -1,4 +1,5 @@
 import { IMAGE_LOCATIONS } from '../components/Modal/SharedData';
+import { API_BASE_URL } from '../core/utils';
 import { createIcons, X, Save, Trash2, ChevronLeft, ChevronRight } from 'lucide';
 
 export class MapEditor {
@@ -70,7 +71,7 @@ export class MapEditor {
 
   private async loadConfig() {
     try {
-      const res = await fetch(`http://${location.hostname}:3000/api/maps`);
+      const res = await fetch(`${API_BASE_URL}/api/maps`);
       this.allMapConfig = await res.json();
     } catch (err) {
       console.error('Failed to load config:', err);
@@ -169,7 +170,7 @@ export class MapEditor {
       this.saveBtn.disabled = true;
       this.saveBtn.textContent = '저장 중...';
       
-      const res = await fetch(`http://${location.hostname}:3000/api/maps/save`, {
+      const res = await fetch(`${API_BASE_URL}/api/maps/save`, {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ path: this.currentPath, boxes: this.boxes })