feat(tksupport): 전사 행정지원 서비스 신규 구축 (Phase 1 - 휴가신청)

sso_users 기반 전사 휴가신청/승인/잔여일 관리 서비스.
기존 tkfb의 workers 종속 휴가 기능을 전사 확장.

- API: Express + MariaDB, SSO JWT 인증, 자동 마이그레이션
- Web: 대시보드, 휴가 신청/현황/승인 페이지 (보라색 테마)
- DB: sp_vacation_requests, sp_vacation_balances 신규 테이블
- Docker: API(30600), Web(30680) 포트 구성

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

tksupport/api/index.js

@@ -0,0 +1,62 @@
+const express = require('express');
+const cors = require('cors');
+const vacationRoutes = require('./routes/vacationRoutes');
+const vacationRequestModel = require('./models/vacationRequestModel');
+const { requireAuth } = require('./middleware/auth');
+
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+const allowedOrigins = [
+  'https://tkfb.technicalkorea.net',
+  'https://tkreport.technicalkorea.net',
+  'https://tkqc.technicalkorea.net',
+  'https://tkuser.technicalkorea.net',
+  'https://tkpurchase.technicalkorea.net',
+  'https://tksafety.technicalkorea.net',
+  'https://tksupport.technicalkorea.net',
+];
+if (process.env.NODE_ENV === 'development') {
+  allowedOrigins.push('http://localhost:30680');
+}
+app.use(cors({
+  origin: function(origin, cb) {
+    if (!origin || allowedOrigins.includes(origin) || /^http:\/\/192\.168\.\d+\.\d+(:\d+)?$/.test(origin)) return cb(null, true);
+    cb(new Error('CORS blocked: ' + origin));
+  },
+  credentials: true
+}));
+app.use(express.json());
+
+// Health check
+app.get('/health', (req, res) => {
+  res.json({ status: 'ok', service: 'tksupport-api', timestamp: new Date().toISOString() });
+});
+
+// Routes
+app.use('/api/vacation', vacationRoutes);
+
+// 404
+app.use((req, res) => {
+  res.status(404).json({ success: false, error: 'Not Found' });
+});
+
+// Error handler
+app.use((err, req, res, next) => {
+  console.error('tksupport-api Error:', err.message);
+  res.status(err.status || 500).json({
+    success: false,
+    error: err.message || 'Internal Server Error'
+  });
+});
+
+app.listen(PORT, async () => {
+  console.log(`tksupport-api running on port ${PORT}`);
+  try {
+    await vacationRequestModel.runMigration();
+  } catch (err) {
+    console.error('Migration error:', err.message);
+  }
+});
+
+module.exports = app;