feat: initial project setup for Meme Studio

Next.js 14 App Router application for managing homophone pun game levels:

- Better Auth with Prisma adapter for authentication
- MySQL database with Prisma ORM
- Level CRUD operations with drag-and-drop reordering
- Tencent COS integration for image uploads
- shadcn/ui components with Tailwind CSS
- TanStack Query for server state management

prisma/seed.ts

@@ -0,0 +1,72 @@
+import { PrismaClient } from '@prisma/client'
+import { hashPassword } from 'better-auth/crypto'
+
+const prisma = new PrismaClient()
+
+async function main() {
+  const email = process.env.ADMIN_EMAIL || 'admin@example.com'
+  const password = process.env.ADMIN_PASSWORD || 'admin123456'
+
+  // Check if admin already exists
+  const existingUser = await prisma.user.findUnique({
+    where: { email },
+    include: { accounts: true },
+  })
+
+  if (existingUser) {
+    // Update password for existing user
+    const hashedPassword = await hashPassword(password)
+
+    if (existingUser.accounts.length > 0) {
+      await prisma.account.update({
+        where: { id: existingUser.accounts[0].id },
+        data: { password: hashedPassword },
+      })
+    } else {
+      await prisma.account.create({
+        data: {
+          accountId: email,
+          providerId: 'credential',
+          userId: existingUser.id,
+          password: hashedPassword,
+        },
+      })
+    }
+
+    console.log(`Admin user password updated: ${email}`)
+    return
+  }
+
+  // Hash password using Better Auth's method
+  const hashedPassword = await hashPassword(password)
+
+  // Create admin user
+  const user = await prisma.user.create({
+    data: {
+      email,
+      name: 'Admin',
+      emailVerified: true,
+    },
+  })
+
+  // Create account with password
+  await prisma.account.create({
+    data: {
+      accountId: email,
+      providerId: 'credential',
+      userId: user.id,
+      password: hashedPassword,
+    },
+  })
+
+  console.log(`Admin user created: ${email}`)
+}
+
+main()
+  .catch((e) => {
+    console.error(e)
+    process.exit(1)
+  })
+  .finally(async () => {
+    await prisma.$disconnect()
+  })