chore: initial Vector 2.0 monorepo

Ground-up TypeScript rewrite of the Vector hardware parts inventory
system. Ships the full roadmap (Phases 0-8) in one initial commit:

- pnpm + Turbo monorepo: apps/{api,web,e2e}, packages/{db,shared,ui,config}
- Express 5 + Prisma 5 + zod validation + JWT w/ refresh-token rotation
- React 19 + Vite + shadcn/ui + TanStack Query/Table + nuqs URL state
- Repair/RMA, tags, bulk ops, saved views, CSV audit export
- Analytics dashboard on Recharts + EOL tracking
- Signed webhook subscriptions (HMAC-SHA256) with in-process emitter
- Vitest unit tests (shared schemas, api services/helpers) + Playwright skeleton
- Gitea Actions CI (lint, typecheck, test+coverage, build) + Renovate

Deferred follow-ups: Postgres cutover (data-migration script ready),
BullMQ worker for webhook delivery, @react-pdf PDF export, CSV import wizard.

packages/db/prisma/seed.ts

@@ -0,0 +1,27 @@
+import bcrypt from 'bcryptjs';
+import { prisma } from '../src/client.js';
+
+async function main() {
+  const passwordHash = await bcrypt.hash('admin', 12);
+
+  const admin = await prisma.user.upsert({
+    where: { username: 'admin' },
+    update: {},
+    create: {
+      username: 'admin',
+      email: 'admin@vector.local',
+      passwordHash,
+      role: 'ADMIN',
+    },
+  });
+
+  console.log(`Seeded admin user: ${admin.username} (${admin.email})`);
+  console.log('Default password: admin — change this immediately!');
+}
+
+main()
+  .catch((err) => {
+    console.error(err);
+    process.exit(1);
+  })
+  .finally(() => prisma.$disconnect());