Initial commit: full-stack Bun + Elysia + React template

Elysia.js API with session-based auth (email/password + Google OAuth),
role system (USER/ADMIN/SUPER_ADMIN), Prisma + PostgreSQL, React 19
with Mantine UI, TanStack Router, dark theme, and comprehensive test
suite (unit, integration, E2E with Lightpanda).

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

src/lib/db.ts

@@ -0,0 +1,13 @@
+import { PrismaClient } from '../../generated/prisma'
+
+const globalForPrisma = globalThis as unknown as { prisma: PrismaClient }
+
+export const prisma =
+  globalForPrisma.prisma ??
+  new PrismaClient({
+    log: process.env.NODE_ENV === 'development' ? ['warn', 'error'] : ['error'],
+  })
+
+if (process.env.NODE_ENV !== 'production') {
+  globalForPrisma.prisma = prisma
+}