optimize register error tip

src/lib/translations.ts

@@ -62,6 +62,9 @@ export const translations = {
       noAccount: 'No account? Register',
       continueWithGoogle: 'Google',
       emailHint: 'Used only for sign-in and history sync.',
+      emailRequired: 'Please enter your email address.',
+      emailInvalid: 'Please enter a valid email address.',
+      passwordRequired: 'Please enter your password.',
       passwordHint: 'Use at least 6 characters. Letters and numbers are recommended.',
       confirmPassword: 'Confirm Password',
       passwordMismatch: 'The two passwords do not match.',
@@ -167,6 +170,9 @@ export const translations = {
       noAccount: '没有账号？去注册',
       continueWithGoogle: 'Google',
       emailHint: '仅用于登录和同步记录。',
+      emailRequired: '请输入邮箱地址。',
+      emailInvalid: '请输入有效的邮箱地址。',
+      passwordRequired: '请输入密码。',
       passwordHint: '密码至少 6 位，建议使用字母和数字组合。',
       confirmPassword: '确认密码',
       passwordMismatch: '两次输入的密码不一致。',