feat: initial NFC Attendance Hub implementation

- Multi-tenant client management with unique API keys
- Semaphore SMS integration (per-client key + sender name + credit balance)
- DB-based SMS queue with 3-attempt retry and exponential backoff
- Failed SMS dashboard with manual retry button
- Reports page with date/client filter and CSV export
- Admin auth via NextAuth (email/password)
- Docker Compose setup (app + PostgreSQL 16)
- Prisma 5 schema with SmsQueue, SmsLog, Client, User models

Tech: Next.js 14 App Router + TypeScript + Tailwind CSS + Prisma + PostgreSQL

prisma/seed.ts

@@ -0,0 +1,24 @@
+import { PrismaClient } from '@prisma/client'
+import bcrypt from 'bcryptjs'
+
+const prisma = new PrismaClient()
+
+async function main() {
+  const email = process.env.SEED_EMAIL || 'admin@nfchub.local'
+  const password = process.env.SEED_PASSWORD || 'admin123'
+
+  const existing = await prisma.user.findUnique({ where: { email } })
+  if (!existing) {
+    const hashed = await bcrypt.hash(password, 12)
+    await prisma.user.create({
+      data: { email, password: hashed, name: 'Admin', role: 'ADMIN' },
+    })
+    console.log(`✅ Created admin user: ${email}`)
+  } else {
+    console.log(`ℹ Admin user already exists: ${email}`)
+  }
+}
+
+main()
+  .catch(e => { console.error(e); process.exit(1) })
+  .finally(() => prisma.$disconnect())