refactor: worker_id → user_id 전체 마이그레이션 (Phase 1-4)

sso_users.user_id를 단일 식별자로 통합. JWT에서 worker_id 제거,
department_id/is_production 추가. 백엔드 15개 모델, 11개 컨트롤러,
4개 서비스, 7개 라우트, 프론트엔드 32+ JS/11+ HTML 변환.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

system1-factory/api/models/departmentModel.js

@@ -91,7 +91,7 @@ const departmentModel = {
       SELECT w.*, d.department_name, u.user_id, u.username
       FROM workers w
       LEFT JOIN departments d ON w.department_id = d.department_id
-      LEFT JOIN users u ON u.worker_id = w.worker_id
+      LEFT JOIN users u ON u.user_id = w.user_id
       WHERE w.department_id = ?
       ORDER BY w.worker_name
     `, [departmentId]);
@@ -99,20 +99,20 @@ const departmentModel = {
   },
 
   // 작업자 부서 변경
-  async moveWorker(workerId, departmentId) {
+  async moveWorker(userId, departmentId) {
     const db = await getDb();
     const [result] = await db.query(`
-      UPDATE workers SET department_id = ? WHERE worker_id = ?
-    `, [departmentId, workerId]);
+      UPDATE workers SET department_id = ? WHERE user_id = ?
+    `, [departmentId, userId]);
     return result.affectedRows > 0;
   },
 
   // 여러 작업자 부서 일괄 변경
-  async moveWorkers(workerIds, departmentId) {
+  async moveWorkers(userIds, departmentId) {
     const db = await getDb();
     const [result] = await db.query(`
-      UPDATE workers SET department_id = ? WHERE worker_id IN (?)
-    `, [departmentId, workerIds]);
+      UPDATE workers SET department_id = ? WHERE user_id IN (?)
+    `, [departmentId, userIds]);
     return result.affectedRows;
   }
 };