feat(web): call the login name the account ID and list sign-up requirements

web/src/core-bridge/worker/account.ts

@@ -35,7 +35,7 @@ export function unlockedAccount() {
 let restoration: Promise<void> | undefined;
 export function usernameOf(input: string): string {
   const username = input.trim().toLowerCase();
-  if (!/^[a-z0-9_-]{3,32}$/.test(username)) throw new Error('用户名需为 3–32 位字母、数字、下划线或短横线');
+  if (!/^[a-z0-9_-]{3,32}$/.test(username)) throw new Error('账号 ID 需为 3–32 位字母、数字、下划线或短横线');
   return username;
 }
 function headers(session: Pick<AccountSession, 'token'>): Record<string, string> { return { 'X-WD-Account': session.token }; }