Initial scaffold: React/Vite/TS PWA + Express/Prisma/Postgres backend

Materialschein & Kabelrechner für BergVOLT Elektrotechnik, portiert von der
vorherigen Single-File-HTML-Version. Microsoft-Entra-ID-Login (MSAL), Projekt-
Dashboard statt einer Datei pro Kunde, Retour-Buchen-Zusammenführung, 111
Kabeltypen aus den offiziellen Meinhart-Datenblättern. gitops/ nach
PROX/deploy-standard: git-backed Portainer-Stack, versionierte Docker-Images,
CI-Commit-back auf gitops/stack.yml.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

server/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "materialschein-server",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "tsx watch src/index.ts",
+    "build": "tsc -p tsconfig.json",
+    "start": "node dist/index.js",
+    "prisma:generate": "prisma generate",
+    "prisma:migrate": "prisma migrate dev"
+  },
+  "dependencies": {
+    "@prisma/client": "^5.20.0",
+    "cors": "^2.8.5",
+    "express": "^4.21.0",
+    "jwks-rsa": "^3.1.0",
+    "jsonwebtoken": "^9.0.2"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.17",
+    "@types/express": "^4.17.21",
+    "@types/jsonwebtoken": "^9.0.7",
+    "@types/node": "^22.7.4",
+    "prisma": "^5.20.0",
+    "tsx": "^4.19.1",
+    "typescript": "^5.6.2"
+  }
+}