feat: Initial implementation of Annas Rechnungsmanager

Full-stack German accounting & invoice management web application: - Multi-company management (Mandantenverwaltung) with full CRUD - Invoice creation with dynamic line items and automatic tax calculation - Sequential invoice numbering per company (RE-2024-001 format) - §14 UStG compliant PDF invoice generation via @react-pdf/renderer - Customer management (Kundenverwaltung) per company - Tax reports: quarterly USt-Voranmeldung and monthly revenue overview - Email/password authentication via NextAuth.js v5 - Responsive, modern UI with Tailwind CSS and custom shadcn/ui components - Prisma v5 ORM with MySQL/MariaDB schema + demo seed data Stack: Next.js 14 (App Router) · TypeScript · Prisma/MySQL · NextAuth.js https://claude.ai/code/session_01FN53KKxo5ebrGwqFhxzkT9
2026-03-07 17:27:57 +00:00
commit 44e79e657f
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+import { PrismaClient } from "@prisma/client";
+import bcrypt from "bcryptjs";
+
+const prisma = new PrismaClient();
+
+async function main() {
+  console.log("Seeding database...");
+
+  // Create demo user
+  const passwordHash = await bcrypt.hash("demo123", 12);
+  const user = await prisma.user.upsert({
+    where: { email: "anna@example.de" },
+    update: {},
+    create: {
+      email: "anna@example.de",
+      passwordHash,
+      name: "Anna Musterfrau",
+    },
+  });
+  console.log(`✓ User created: ${user.email}`);
+
+  // Create demo company
+  const company = await prisma.company.upsert({
+    where: { id: "demo-company-1" },
+    update: {},
+    create: {
+      id: "demo-company-1",
+      name: "Muster GmbH",
+      legalForm: "GmbH",
+      taxId: "123/456/78901",
+      vatId: "DE123456789",
+      address: "Musterstraße 1",
+      zip: "10115",
+      city: "Berlin",
+      email: "info@muster-gmbh.de",
+      phone: "+49 30 12345678",
+      bankName: "Musterbank",
+      bankIban: "DE89 3704 0044 0532 0130 00",
+      bankBic: "COBADEFFXXX",
+      invoicePrefix: "RE",
+      userId: user.id,
+    },
+  });
+  console.log(`✓ Company created: ${company.name}`);
+
+  // Create demo customer
+  const customer = await prisma.customer.upsert({
+    where: { id: "demo-customer-1" },
+    update: {},
+    create: {
+      id: "demo-customer-1",
+      companyId: company.id,
+      name: "Beispiel AG",
+      vatId: "DE987654321",
+      address: "Beispielweg 5",
+      zip: "20095",
+      city: "Hamburg",
+      email: "kontakt@beispiel-ag.de",
+    },
+  });
+  console.log(`✓ Customer created: ${customer.name}`);
+
+  // Create demo invoice
+  const invoice = await prisma.invoice.create({
+    data: {
+      number: "RE-2024-001",
+      companyId: company.id,
+      customerId: customer.id,
+      issueDate: new Date("2024-01-15"),
+      deliveryDate: new Date("2024-01-15"),
+      dueDate: new Date("2024-02-14"),
+      status: "SENT",
+      netTotal: 1000.0,
+      taxTotal: 190.0,
+      grossTotal: 1190.0,
+      items: {
+        create: [
+          {
+            position: 1,
+            description: "Buchhaltungsleistungen Januar 2024",
+            quantity: 10,
+            unit: "h",
+            unitPrice: 100.0,
+            taxRate: 19.0,
+            netAmount: 1000.0,
+            taxAmount: 190.0,
+            grossAmount: 1190.0,
+          },
+        ],
+      },
+    },
+  });
+  console.log(`✓ Invoice created: ${invoice.number}`);
+
+  // Update company sequence
+  await prisma.company.update({
+    where: { id: company.id },
+    data: { invoiceSequence: 1 },
+  });
+
+  console.log("\n✅ Seed complete!");
+  console.log("Login: anna@example.de / demo123");
+}
+
+main()
+  .catch((e) => {
+    console.error(e);
+    process.exit(1);
+  })
+  .finally(async () => {
+    await prisma.$disconnect();
+  });