feat(rack): add shift-click context modal for connections with color and edge type configurability

server/services/connectionService.ts

@@ -1,7 +1,7 @@
 import { prisma } from '../lib/prisma';
 import { AppError } from '../types/index';
 
-export async function createConnection(data: { fromPortId: string; toPortId: string; color?: string; label?: string }) {
+export async function createConnection(data: { fromPortId: string; toPortId: string; color?: string; label?: string; edgeType?: string }) {
   // Check if both ports exist
   const [from, to] = await Promise.all([
     prisma.port.findUnique({ where: { id: data.fromPortId } }),
@@ -22,6 +22,13 @@ export async function deleteConnection(id: string) {
   return prisma.connection.delete({ where: { id } });
 }
 
+export async function updateConnection(id: string, data: Partial<{ color: string; label: string; edgeType: string }>) {
+  return prisma.connection.update({
+    where: { id },
+    data,
+  });
+}
+
 export async function deleteByPorts(portId1: string, portId2: string) {
   return prisma.connection.deleteMany({
     where: {