리스트 위젯 REST API 기능 개선

frontend/components/admin/dashboard/widgets/ListWidget.tsx

@@ -285,16 +285,46 @@ export function ListWidget({ element, onConfigUpdate }: ListWidgetProps) {
             });
           }
 
+          // 요청 메서드 (기본값: GET)
+          const requestMethod = element.dataSource.method || "GET";
+          
+          // 요청 body (POST, PUT, PATCH인 경우)
+          let requestBody = undefined;
+          if (["POST", "PUT", "PATCH"].includes(requestMethod) && element.dataSource.body) {
+            try {
+              requestBody = typeof element.dataSource.body === "string" 
+                ? JSON.parse(element.dataSource.body) 
+                : element.dataSource.body;
+            } catch {
+              requestBody = element.dataSource.body;
+            }
+          }
+
+          // headers를 KeyValuePair[] 에서 객체로 변환
+          const headersObj: Record<string, string> = {};
+          if (element.dataSource.headers && Array.isArray(element.dataSource.headers)) {
+            element.dataSource.headers.forEach((h: any) => {
+              if (h.key && h.value) {
+                headersObj[h.key] = h.value;
+              }
+            });
+          } else if (element.dataSource.headers && typeof element.dataSource.headers === "object") {
+            Object.assign(headersObj, element.dataSource.headers);
+          }
+
           const response = await fetch(getApiUrl("/api/dashboards/fetch-external-api"), {
             method: "POST",
             headers: {
               "Content-Type": "application/json",
             },
+            credentials: "include",
             body: JSON.stringify({
               url: element.dataSource.endpoint,
-              method: "GET",
-              headers: element.dataSource.headers || {},
+              method: requestMethod,
+              headers: headersObj,
               queryParams: Object.fromEntries(params),
+              body: requestBody,
+              externalConnectionId: element.dataSource.externalConnectionId,
             }),
           });