feat: align with upstream 1.5.9.9

app/utils/oauth-register.ts

@@ -0,0 +1,36 @@
+import { getPasswordPolicyViolation } from './password-policy'
+
+// OAuth 注册用户名规则
+export const OAUTH_REGISTER_USERNAME_PATTERN = /^[a-zA-Z0-9_-]+$/
+export const OAUTH_REGISTER_USERNAME_MIN_LENGTH = 3
+export const OAUTH_REGISTER_USERNAME_MAX_LENGTH = 30
+
+// 校验 OAuth 注册凭据，返回稳定错误码与中文兜底文案；通过时返回 null。
+// 不依赖 useLocale，前端与服务端可安全共用；文案本地化由调用方按 code 完成。
+export const validateOAuthRegisterCredentials = (
+  username: string,
+  password: string,
+  confirmPassword: string
+): { code: string; message: string } | null => {
+  if (
+    username.length < OAUTH_REGISTER_USERNAME_MIN_LENGTH ||
+    username.length > OAUTH_REGISTER_USERNAME_MAX_LENGTH
+  ) {
+    return { code: 'AUTH_USERNAME_LENGTH_INVALID', message: '用户名长度需要在3-30个字符之间' }
+  }
+
+  if (!OAUTH_REGISTER_USERNAME_PATTERN.test(username)) {
+    return { code: 'AUTH_USERNAME_PATTERN_INVALID', message: '用户名仅可包含英文、数字、下划线和连字符' }
+  }
+
+  const passwordViolation = getPasswordPolicyViolation(password)
+  if (passwordViolation) {
+    return passwordViolation
+  }
+
+  if (password !== confirmPassword) {
+    return { code: 'AUTH_REGISTER_PASSWORD_MISMATCH', message: '两次输入的密码不一致' }
+  }
+
+  return null
+}