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

web/src/features/channel/InviteSheet.tsx

@@ -30,8 +30,8 @@ export function InviteSheet({ onClose, onInvited }: { onClose: () => void; onInv
 
   return <Sheet title="邀请成员" onClose={() => { if (!busy) onClose(); }} placement="top">
     <form className={styles.invite} onSubmit={(event) => { void submit(event); }}>
-      <label>用户名
-        <input autoFocus maxLength={32} value={username} disabled={busy} placeholder="已注册用户的用户名" onChange={(event) => setUsername(event.target.value)} />
+      <label>账号 ID
+        <input autoFocus maxLength={32} value={username} disabled={busy} placeholder="已注册用户的账号 ID" onChange={(event) => setUsername(event.target.value)} />
       </label>
       <p className={styles.note}>对方登录后会收到通知，接受邀请后加入空间。能否读取加入前的历史，取决于各频道的历史开关。</p>
       {error ? <p className={styles.error} role="alert">{error}</p> : null}