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/src/client.ts

@@ -0,0 +1,33 @@
+import { PrismaClient } from '@prisma/client';
+import { fileURLToPath, pathToFileURL } from 'node:url';
+import path from 'node:path';
+
+declare global {
+  // eslint-disable-next-line no-var
+  var __vectorPrisma: PrismaClient | undefined;
+}
+
+function resolveSqliteUrl(raw: string | undefined): string | undefined {
+  if (!raw || !raw.startsWith('file:')) return raw;
+  const rest = raw.slice('file:'.length).replace(/^\/+/, '');
+  if (path.isAbsolute(rest) || /^[A-Za-z]:[\\/]/.test(rest)) {
+    return 'file:' + rest.replace(/\\/g, '/');
+  }
+  const here = path.dirname(fileURLToPath(import.meta.url));
+  const schemaDir = path.resolve(here, '..', 'prisma');
+  const absolute = path.resolve(schemaDir, rest);
+  return 'file:' + absolute.replace(/\\/g, '/');
+}
+
+const url = resolveSqliteUrl(process.env.DATABASE_URL);
+
+export const prisma: PrismaClient =
+  globalThis.__vectorPrisma ??
+  new PrismaClient({
+    datasources: url ? { db: { url } } : undefined,
+    log: process.env.NODE_ENV === 'production' ? ['error'] : ['warn', 'error'],
+  });
+
+if (process.env.NODE_ENV !== 'production') {
+  globalThis.__vectorPrisma = prisma;
+}