Initial scaffold: full-stack RackMapper application

Complete project scaffold with working auth, REST API, Prisma/SQLite
schema, Docker config, and React frontend for both Rack Planner and
Service Mapper modules. Both server and client pass TypeScript strict
mode with zero errors. Initial migration applied.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/routes/nodes.ts

@@ -0,0 +1,33 @@
+import { Router, Request, Response, NextFunction } from 'express';
+import * as mapService from '../services/mapService';
+import { ok } from '../types/index';
+
+export const nodesRouter = Router();
+
+nodesRouter.put('/:id', async (req: Request, res: Response, next: NextFunction) => {
+  try {
+    const { label, positionX, positionY, metadata, color, icon, moduleId } = req.body as {
+      label?: string;
+      positionX?: number;
+      positionY?: number;
+      metadata?: string;
+      color?: string;
+      icon?: string;
+      moduleId?: string | null;
+    };
+    res.json(
+      ok(await mapService.updateNode(req.params.id, { label, positionX, positionY, metadata, color, icon, moduleId }))
+    );
+  } catch (e) {
+    next(e);
+  }
+});
+
+nodesRouter.delete('/:id', async (req: Request, res: Response, next: NextFunction) => {
+  try {
+    await mapService.deleteNode(req.params.id);
+    res.json(ok(null));
+  } catch (e) {
+    next(e);
+  }
+});