feat(rack-planner): implement port-to-port connections (patch cables) with dynamic SVG visualization layer

server/index.ts

@@ -12,6 +12,7 @@ import { vlansRouter } from './routes/vlans';
 import { serviceMapRouter } from './routes/serviceMap';
 import { nodesRouter } from './routes/nodes';
 import { edgesRouter } from './routes/edges';
+import connectionsRouter from './routes/connections';
 import { authMiddleware } from './middleware/authMiddleware';
 import { errorHandler } from './middleware/errorHandler';
 
@@ -44,6 +45,7 @@ app.use('/api/vlans', vlansRouter);
 app.use('/api/maps', serviceMapRouter);
 app.use('/api/nodes', nodesRouter);
 app.use('/api/edges', edgesRouter);
+app.use('/api/connections', connectionsRouter);
 
 // ---- Serve Vite build in production ----
 if (process.env.NODE_ENV === 'production') {