Add native Olist composition sync

backend/routes/olistRoutes.js

@@ -0,0 +1,55 @@
+const express = require('express');
+const { verifySuperAdmin } = require('../auth');
+const {
+    completeAuthorization,
+    createAuthorizationUrl,
+    getOlistFrontendRedirect,
+    getOlistStatus,
+    startOlistSync
+} = require('../services/olistService');
+
+const router = express.Router();
+
+router.get('/olist/status', verifySuperAdmin, async (req, res, next) => {
+    try {
+        res.json(await getOlistStatus());
+    } catch (error) {
+        next(error);
+    }
+});
+
+router.post('/olist/authorization-url', verifySuperAdmin, async (req, res, next) => {
+    try {
+        res.json({ url: await createAuthorizationUrl() });
+    } catch (error) {
+        next(error);
+    }
+});
+
+router.post('/olist/sync', verifySuperAdmin, async (req, res, next) => {
+    try {
+        const result = await startOlistSync({
+            trigger: 'manual',
+            fullSync: req.body?.fullSync === true
+        });
+        res.status(result.accepted ? 202 : 409).json(result);
+    } catch (error) {
+        next(error);
+    }
+});
+
+router.get('/olist/oauth/callback', async (req, res) => {
+    try {
+        if (req.query.error || !req.query.code || !req.query.state) {
+            res.redirect(getOlistFrontendRedirect('cancelled'));
+            return;
+        }
+        await completeAuthorization({ code: String(req.query.code), state: String(req.query.state) });
+        res.redirect(getOlistFrontendRedirect('connected'));
+    } catch (error) {
+        console.error('Olist OAuth callback failed:', error.message);
+        res.redirect(getOlistFrontendRedirect('failed'));
+    }
+});
+
+module.exports = router;