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/web/js/worker-individual-report.js

@@ -15,7 +15,7 @@ let existingWork = [];
 function getUrlParams() {
   const urlParams = new URLSearchParams(window.location.search);
   return {
-    worker_id: urlParams.get('worker_id'),
+    user_id: urlParams.get('user_id'),
     worker_name: decodeURIComponent(urlParams.get('worker_name') || ''),
     date: urlParams.get('date') || new Date().toISOString().split('T')[0]
   };
@@ -88,7 +88,7 @@ async function initializePage() {
   
   // URL 파라미터 추출
   const params = getUrlParams();
-  currentWorkerId = parseInt(params.worker_id);
+  currentWorkerId = parseInt(params.user_id);
   currentWorkerName = params.worker_name;
   selectedDate = params.date;
   
@@ -189,7 +189,7 @@ async function loadWorkerInfo() {
 
 async function loadExistingWork() {
   try {
-    const response = await window.apiCall(`/daily-work-reports?date=${selectedDate}&worker_id=${currentWorkerId}`);
+    const response = await window.apiCall(`/daily-work-reports?date=${selectedDate}&user_id=${currentWorkerId}`);
     existingWork = Array.isArray(response) ? response : (response.data || []);
     console.log(`✅ 기존 작업 ${existingWork.length}건 로드 완료`);
   } catch (error) {
@@ -398,7 +398,7 @@ async function saveNewWork() {
     
     const workData = {
       report_date: selectedDate,
-      worker_id: currentWorkerId,
+      user_id: currentWorkerId,
       project_id: parseInt(projectId),
       work_type_id: parseInt(workTypeId),
       work_status_id: parseInt(workStatusId),
@@ -477,7 +477,7 @@ async function handleVacationProcess(vacationType) {
     // 휴가용 작업 보고서 생성
     const vacationWork = {
       report_date: selectedDate,
-      worker_id: currentWorkerId,
+      user_id: currentWorkerId,
       project_id: 1, // 기본 프로젝트 (휴가용)
       work_type_id: 999, // 휴가 전용 작업 유형 (DB에 추가 필요)
       work_status_id: 1, // 정상 상태