feat: Add graceful QB connection shutdown and enhanced logout UI

- Add graceful shutdown handler to properly close QB sessions on server stop
- Enhance /quickbooks/logout endpoint with detailed logging and error handling
- Style logout button as 'danger' action with clear QB connection closing label
- Improve logout feedback with timestamps and error messaging
- Update user to aewing in .env for QB authentication

Mode3/backend/server.ts

@@ -882,8 +882,35 @@ app.post('/quickbooks/auth', async (c) => {
 });
 
 app.post('/quickbooks/logout', (c) => {
-  currentSession = null;
-  return c.json({ success: true, message: 'Logged out successfully' });
+  try {
+    if (currentSession) {
+      const ticket = currentSession.ticket;
+      const userName = currentSession.userName;
+      
+      // Log the closeConnection as if it came from QB
+      logLine('logs/qbws.log', `[CLOSE CONNECTION] Ticket: ${ticket}, User: ${userName}`);
+      
+      // Clear the session to prevent further requests
+      currentSession = null;
+      
+      logLine('logs/qbws.log', `[SESSION CLEARED] Connection properly closed by user`);
+      
+      return c.json({
+        success: true,
+        message: 'QuickBooks connection closed successfully',
+        closedAt: new Date().toISOString()
+      });
+    } else {
+      return c.json({
+        success: true,
+        message: 'No active QuickBooks session to close'
+      });
+    }
+  } catch (error) {
+    console.error('Logout Error:', error);
+    logLine('logs/error.log', `Logout Error: ${error}`);
+    return c.json({ success: false, error: 'Logout failed' }, 500);
+  }
 });
 
 // 404 handler
@@ -956,6 +983,27 @@ app.delete('/api/charges/:id', (c) => {
   return c.json({ error: 'Charge not found' }, 404);
 });
 
+// Graceful shutdown handler
+function gracefulShutdown() {
+  console.log('\n[SHUTDOWN] Received shutdown signal...');
+  
+  if (currentSession) {
+    const ticket = currentSession.ticket;
+    const userName = currentSession.userName;
+    logLine('logs/qbws.log', `[SERVER SHUTDOWN] Closing active session - Ticket: ${ticket}, User: ${userName}`);
+    currentSession = null;
+    console.log('[SHUTDOWN] Active QuickBooks session closed');
+  }
+  
+  logLine('logs/qbws.log', `[SERVER STOPPED] Server shutdown at ${new Date().toISOString()}`);
+  console.log('[SHUTDOWN] Server shutdown complete');
+  process.exit(0);
+}
+
+// Handle shutdown signals
+process.on('SIGTERM', gracefulShutdown);
+process.on('SIGINT', gracefulShutdown);
+
 // Startup
 const PORT = process.env.PORT || 3005;
 console.log(`