Implement Email-Based Authentication Infrastructure

lib/auth-schema.ts

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+import { z } from 'zod';
+
+export const LoginSchema = z.object({
+  email: z.string().email('Invalid email address'),
+  password: z.string()
+    .min(8, 'Password must be at least 8 characters')
+    .max(50, 'Password must be less than 50 characters')
+});
+
+export const RegisterSchema = LoginSchema.extend({
+  name: z.string()
+    .min(2, 'Name must be at least 2 characters')
+    .max(50, 'Name must be less than 50 characters')
+    .optional()
+});

lib/auth-service.ts

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+import { LoginCredentials, RegisterCredentials, User } from '../types/auth';
+import { v4 as uuidv4 } from 'uuid';
+
+// Simulated in-memory storage (replace with actual database later)
+const USERS: User[] = [];
+
+export const authService = {
+  register: async (credentials: RegisterCredentials): Promise<User> => {
+    const existingUser = USERS.find(u => u.email === credentials.email);
+    if (existingUser) {
+      throw new Error('User already exists');
+    }
+
+    const newUser: User = {
+      id: uuidv4(),
+      email: credentials.email,
+      name: credentials.name
+    };
+
+    USERS.push(newUser);
+    return newUser;
+  },
+
+  login: async (credentials: LoginCredentials): Promise<User> => {
+    const user = USERS.find(u => u.email === credentials.email);
+    if (!user) {
+      throw new Error('Invalid credentials');
+    }
+    return user;
+  },
+
+  getCurrentUser: (): User | null => {
+    return USERS.length > 0 ? USERS[0] : null;
+  }
+};