feat: add authentication modal component and user authentication logic

- Implemented AuthModal.vue for user login and registration with form handling.
- Created useAuth composable for managing user state and authentication requests.
- Added admin route middleware to protect admin routes.
- Developed admin login page with authentication checks.
- Implemented API endpoints for user management (login, logout, fetch user, register).
- Created database migrations for users table and updated movies table.
- Added utility functions for password hashing and JWT token management.

server/api/auth/register.post.ts

@@ -0,0 +1,56 @@
+import { users } from '../../database/schema'
+import { eq, sql } from 'drizzle-orm'
+import { hashPassword, signToken } from '../../utils/auth'
+
+export default defineEventHandler(async (event) => {
+  const db = useDb()
+  const body = await readBody(event)
+
+  const email = typeof body.email === 'string' ? body.email.trim().toLowerCase() : ''
+  const password = typeof body.password === 'string' ? body.password : ''
+  const name = typeof body.name === 'string' ? body.name.trim() : ''
+
+  if (!email || !password) {
+    throw createError({ statusCode: 400, message: 'Email và mật khẩu là bắt buộc' })
+  }
+
+  if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
+    throw createError({ statusCode: 400, message: 'Email không hợp lệ' })
+  }
+
+  if (password.length < 6) {
+    throw createError({ statusCode: 400, message: 'Mật khẩu phải có ít nhất 6 ký tự' })
+  }
+
+  const existing = await db.select().from(users).where(eq(users.email, email)).limit(1)
+  if (existing.length) {
+    throw createError({ statusCode: 409, message: 'Email đã được sử dụng' })
+  }
+
+  const hashedPassword = await hashPassword(password)
+  const isAdmin = (await db.select({ count: sql<number>`count(*)` }).from(users))[0]?.count === 0
+
+  const result = await db.insert(users).values({
+    email,
+    password: hashedPassword,
+    name: name || email.split('@')[0],
+    role: isAdmin ? 'admin' : 'user',
+  })
+
+  const userId = result[0].insertId
+  const user = { id: userId, email, role: isAdmin ? 'admin' : 'user' }
+  const token = signToken(user)
+
+  setCookie(event, 'token', token, {
+    httpOnly: true,
+    secure: false,
+    sameSite: 'lax',
+    maxAge: 60 * 60 * 24 * 7,
+    path: '/',
+  })
+
+  return {
+    user: { id: userId, email, name: name || email.split('@')[0], role: user.role },
+    token,
+  }
+})