feat: Add cutting plan management for COMPANY_30

- Cutting optimization (Guillotine FFDH) with mixed/homogeneous modes
- Remnant management with persistence (cutting_plan_sheet.remnants JSONB)
- Work instruction creation linked via batch_no/cutting_plan_id

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend-node/src/controllers/cuttingPlanController.ts

@@ -0,0 +1,97 @@
+/**
+ * 절단계획 컨트롤러
+ */
+
+import { Response } from "express";
+import { AuthenticatedRequest } from "../types/auth";
+import * as svc from "../services/cuttingPlanService";
+import { logger } from "../utils/logger";
+
+function wrap(res: Response, fn: () => Promise<any>, errMsg: string) {
+  return fn().then(
+    (data) => res.json({ success: true, data }),
+    (e: any) => {
+      logger.error(errMsg, { error: e?.message });
+      return res.status(500).json({ success: false, message: e?.message || errMsg });
+    }
+  );
+}
+
+export function getMaterials(req: AuthenticatedRequest, res: Response) {
+  const companyCode = req.user!.companyCode;
+  const cutType = (req.query.cutType as string) || "area";
+  return wrap(res, () => svc.getMaterials(companyCode, cutType), "원자재 조회 실패");
+}
+
+export function searchItems(req: AuthenticatedRequest, res: Response) {
+  const companyCode = req.user!.companyCode;
+  const keyword = req.query.keyword as string | undefined;
+  return wrap(res, () => svc.searchItems(companyCode, keyword), "품목 검색 실패");
+}
+
+export function getOrders(req: AuthenticatedRequest, res: Response) {
+  const companyCode = req.user!.companyCode;
+  const from = req.query.from as string | undefined;
+  const to = req.query.to as string | undefined;
+  const keyword = req.query.keyword as string | undefined;
+  const page = req.query.page ? parseInt(req.query.page as string, 10) : undefined;
+  const limit = req.query.limit ? parseInt(req.query.limit as string, 10) : undefined;
+  const excludeInPlan = req.query.excludeInPlan === "true";
+  return wrap(
+    res,
+    () => svc.getOrders(companyCode, { from, to, keyword, page, limit, excludeInPlan }),
+    "수주 조회 실패"
+  );
+}
+
+export function getPlans(req: AuthenticatedRequest, res: Response) {
+  const companyCode = req.user!.companyCode;
+  const { from, to, planNo, status } = req.query;
+  return wrap(res, () => svc.getPlans(companyCode, {
+    from: from as string, to: to as string,
+    planNo: planNo as string, status: status as string,
+  }), "계획 목록 조회 실패");
+}
+
+export async function getPlanDetail(req: AuthenticatedRequest, res: Response) {
+  try {
+    const companyCode = req.user!.companyCode;
+    const id = parseInt(req.params.id, 10);
+    const data = await svc.getPlanDetail(companyCode, id);
+    if (!data) return res.status(404).json({ success: false, message: "계획을 찾을 수 없습니다" });
+    return res.json({ success: true, data });
+  } catch (e: any) {
+    logger.error("계획 상세 조회 실패", { error: e?.message });
+    return res.status(500).json({ success: false, message: e?.message });
+  }
+}
+
+export function nextPlanNo(req: AuthenticatedRequest, res: Response) {
+  const companyCode = req.user!.companyCode;
+  return wrap(res, () => svc.nextPlanNo(companyCode), "계획번호 생성 실패");
+}
+
+export async function savePlan(req: AuthenticatedRequest, res: Response) {
+  try {
+    const companyCode = req.user!.companyCode;
+    const userId = req.user!.userId || "system";
+    const data = await svc.savePlan(companyCode, userId, req.body);
+    return res.json({ success: true, data });
+  } catch (e: any) {
+    logger.error("계획 저장 실패", { error: e?.message });
+    return res.status(500).json({ success: false, message: e?.message });
+  }
+}
+
+export async function deletePlan(req: AuthenticatedRequest, res: Response) {
+  try {
+    const companyCode = req.user!.companyCode;
+    const id = parseInt(req.params.id, 10);
+    const ok = await svc.deletePlan(companyCode, id);
+    if (!ok) return res.status(404).json({ success: false, message: "삭제 대상을 찾을 수 없습니다" });
+    return res.json({ success: true });
+  } catch (e: any) {
+    logger.error("계획 삭제 실패", { error: e?.message });
+    return res.status(500).json({ success: false, message: e?.message });
+  }
+}