스킬 정리 및 리팩토링

app/api/kis/domestic/search/route.ts

@@ -5,6 +5,10 @@ import type {
   KoreanStockIndexItem,
 } from "@/features/trade/types/trade.types";
 import { hasKisApiSession } from "@/app/api/kis/_session";
+import {
+  createKisApiErrorResponse,
+  KIS_API_ERROR_CODE,
+} from "@/app/api/kis/_response";
 import { NextRequest, NextResponse } from "next/server";
 
 const SEARCH_LIMIT = 10;
@@ -29,7 +33,11 @@ const SEARCH_LIMIT = 10;
 export async function GET(request: NextRequest) {
   const hasSession = await hasKisApiSession();
   if (!hasSession) {
-    return NextResponse.json({ error: "로그인이 필요합니다." }, { status: 401 });
+    return createKisApiErrorResponse({
+      status: 401,
+      code: KIS_API_ERROR_CODE.AUTH_REQUIRED,
+      message: "로그인이 필요합니다.",
+    });
   }
 
   // [Step 1] query string에서 검색어(q)를 읽고 공백을 제거합니다.