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/utils/auth.ts

@@ -0,0 +1,46 @@
+import bcrypt from 'bcryptjs'
+import jwt from 'jsonwebtoken'
+
+const JWT_SECRET = process.env.JWT_SECRET || 'cinek-secret-key-change-in-production-2024'
+const JWT_EXPIRES = '7d'
+const SALT_ROUNDS = 10
+
+export async function hashPassword(password: string): Promise<string> {
+  return bcrypt.hash(password, SALT_ROUNDS)
+}
+
+export async function verifyPassword(password: string, hash: string): Promise<boolean> {
+  return bcrypt.compare(password, hash)
+}
+
+export function signToken(payload: { id: number, email: string, role: string }): string {
+  return jwt.sign(payload, JWT_SECRET, { expiresIn: JWT_EXPIRES })
+}
+
+export function verifyToken(token: string): { id: number, email: string, role: string } | null {
+  try {
+    return jwt.verify(token, JWT_SECRET) as { id: number, email: string, role: string }
+  } catch {
+    return null
+  }
+}
+
+export function getTokenFromEvent(event: any): string | null {
+  const authHeader = getHeader(event, 'authorization')
+  if (authHeader?.startsWith('Bearer ')) {
+    return authHeader.slice(7)
+  }
+
+  const cookies = parseCookies(event)
+  return cookies.token || null
+}
+
+function parseCookies(event: any): Record<string, string> {
+  const cookieHeader = getHeader(event, 'cookie') || ''
+  const cookies: Record<string, string> = {}
+  cookieHeader.split(';').forEach((pair: string) => {
+    const [key, ...vals] = pair.trim().split('=')
+    if (key) cookies[key] = decodeURIComponent(vals.join('='))
+  })
+  return cookies
+}