diff --git a/src/index.js b/src/index.js
index af08537..7c88291 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,8 +3,13 @@
  * Modularized Backend
  */
 const express = require('express');
+const path = require('path');
 const puppeteer = require('puppeteer');
 
+// Import config
+const { pool } = require('./config/database');
+const { OAuthClient, getOAuthClient, saveTokens } = require('./config/qbo');
+
 // Import routes
 const customerRoutes = require('./routes/customers');
 const quoteRoutes = require('./routes/quotes');
@@ -49,6 +54,7 @@ async function initBrowser() {
         browser.on('disconnected', () => {
             console.log('[BROWSER] Browser disconnected, restarting...');
             browser = null;
+            setBrowser(null);
             initBrowser();
         });
     }
@@ -57,9 +63,42 @@ async function initBrowser() {
 
 // Middleware
 app.use(express.json());
-app.use(express.static('public'));
+app.use(express.static(path.join(__dirname, '..', 'public')));
 
-// Mount routes
+// =====================================================
+// QBO OAuth Routes — mounted at root level (not under /api/qbo)
+// These must match the Intuit callback URL configuration
+// =====================================================
+app.get('/auth/qbo', (req, res) => {
+    const client = getOAuthClient();
+    const authUri = client.authorizeUri({
+        scope: [OAuthClient.scopes.Accounting],
+        state: 'intuit-qbo-auth'
+    });
+    console.log('🔗 Redirecting to QBO Authorization:', authUri);
+    res.redirect(authUri);
+});
+
+app.get('/auth/qbo/callback', async (req, res) => {
+    const client = getOAuthClient();
+    try {
+        const authResponse = await client.createToken(req.url);
+        console.log('✅ QBO Authorization erfolgreich!');
+        saveTokens();
+        res.redirect('/#settings');
+    } catch (e) {
+        console.error('❌ QBO Authorization fehlgeschlagen:', e);
+        res.status(500).send(`
+            <h2>QBO Authorization Failed</h2>
+            <p>${e.message || e}</p>
+            <a href="/">Zurück zur App</a>
+        `);
+    }
+});
+
+// =====================================================
+// API Routes
+// =====================================================
 app.use('/api/customers', customerRoutes);
 app.use('/api/quotes', quoteRoutes);
 app.use('/api/invoices', invoiceRoutes);
@@ -81,11 +120,10 @@ process.on('SIGTERM', async () => {
     if (browser) {
         await browser.close();
     }
-    const { pool } = require('./config/database');
     await pool.end();
     process.exit(0);
 });
 
 startServer();
 
-module.exports = app;
+module.exports = app;
\ No newline at end of file
diff --git a/src/routes/qbo.js b/src/routes/qbo.js
index b72a537..be9b417 100644
--- a/src/routes/qbo.js
+++ b/src/routes/qbo.js
@@ -1,6 +1,7 @@
 /**
  * QBO Routes
- * Handles QBO OAuth, sync, and data operations
+ * Handles QBO sync and data operations
+ * NOTE: OAuth auth/callback routes are in index.js (root-level paths)
  */
 const express = require('express');
 const router = express.Router();
@@ -22,35 +23,6 @@ router.get('/status', (req, res) => {
     }
 });
 
-// GET auth URL - redirects to Intuit
-router.get('/auth', (req, res) => {
-    const client = getOAuthClient();
-    const authUri = client.authorizeUri({
-        scope: [require('../config/qbo').OAuthClient.scopes.Accounting],
-        state: 'intuit-qbo-auth'
-    });
-    console.log('🔗 Redirecting to QBO Authorization:', authUri);
-    res.redirect(authUri);
-});
-
-// OAuth callback
-router.get('/auth/callback', async (req, res) => {
-    const client = getOAuthClient();
-    try {
-        const authResponse = await client.createToken(req.url);
-        console.log('✅ QBO Authorization erfolgreich!');
-        saveTokens();
-        res.redirect('/#settings');
-    } catch (e) {
-        console.error('❌ QBO Authorization fehlgeschlagen:', e);
-        res.status(500).send(`
-            <h2>QBO Authorization Failed</h2>
-            <p>${e.message || e}</p>
-            <a href="/">Zurück zur App</a>
-        `);
-    }
-});
-
 // GET bank accounts from QBO
 router.get('/accounts', async (req, res) => {
     try {
@@ -597,4 +569,4 @@ router.post('/sync-payments', async (req, res) => {
     }
 });
 
-module.exports = router;
+module.exports = router;
\ No newline at end of file