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

web/src/core-bridge/errors.ts

@@ -8,8 +8,8 @@ const messages: Record<string, string> = {
   captcha_unavailable: '验证码服务暂时不可用,请稍后重试。',
   api_contract_mismatch: '服务端 API 有破坏性更新,请刷新或更新前端后再试。',
   mode_mismatch: '空间加密模式与链接不符,已拒绝访问。', conflict: '上传内容发生冲突,已停止发送。',
-  username_unavailable: '这个用户名已被使用。', vault_conflict: '账号资源在其他设备上刚刚更新，请再次同步。',
+  username_unavailable: '这个账号 ID 已被使用。', vault_conflict: '账号资源在其他设备上刚刚更新，请再次同步。',
-  account_invalid: '用户名或密码错误，或登录已过期。', account_required: '请先登录账号。',
+  account_invalid: '账号 ID 或密码错误，或登录已过期。', account_required: '请先登录账号。',
   invitation_required: '该空间仅允许受邀账号加入，请登录受邀账号或联系空间主。',
   channel_password_required: '请输入空间加入密码。', channel_password_invalid: '空间加入密码不正确。',
   space_name_required: '请填写空间名称。',

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 }; }

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
+      <label>账号 ID
-        <input autoFocus maxLength={32} value={username} disabled={busy} placeholder="已注册用户的用户名" onChange={(event) => setUsername(event.target.value)} />
+        <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}

web/src/features/home/AccountPanel.module.css

@@ -150,6 +150,34 @@
   grid-column: 1 / -1;
 }
 
+.rules {
+  display: grid;
+  gap: 2px;
+  margin: 0;
+  padding: 0;
+  list-style: none;
+  color: var(--text-dim);
+  font-size: 12px;
+  line-height: 1.6;
+}
+
+.rules li {
+  display: flex;
+  gap: var(--space-2);
+}
+
+.rules li[data-met='true'] {
+  color: var(--text);
+}
+
+.srOnly {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  overflow: hidden;
+  clip-path: inset(50%);
+}
+
 .fieldError {
   color: var(--danger);
   font-size: 12px;

web/src/features/home/AccountPanel.tsx

@@ -43,6 +43,14 @@ export function AccountPanel({ variant = 'default' }: { variant?: 'default' | 'a
   }, [account]);
   const creating = register && !unlockUsername;
   const mismatch = creating && confirm !== '' && password !== confirm;
+  // 与服务端一致:ID 3–32 位,仅字母、数字、_、-
+  const rules = [
+    { text: 'ID 为 3–32 个字符', met: username.length >= 3 && username.length <= 32 },
+    { text: 'ID 只能包含字母、数字、下划线 _ 和连字符 -', met: username !== '' && /^[A-Za-z0-9_-]+$/.test(username) },
+    { text: '密码至少 12 个字符', met: password.length >= 12 },
+    { text: '两次输入的密码一致', met: confirm !== '' && password === confirm },
+  ];
+  const unmet = creating && rules.some((rule) => !rule.met);
   async function clearSaved() {
     edited.current = true;
     try { await clearSavedLogin(); setSaved(false); setRemember(false); setUsername(''); setPassword(''); setMessage(account ? '本机保存已清除，当前页面仍可使用；刷新后需要重新登录。' : '已清除本机保存的账号和密码。'); }
@@ -81,14 +89,17 @@ export function AccountPanel({ variant = 'default' }: { variant?: 'default' | 'a
             <button type="button" aria-pressed={register} onClick={() => { edited.current = true; setRegister(true); setMessage(''); }}>创建账号</button>
           </div> : null}
           {unlockUsername ? <p className={styles.note}>已用Passkey确认账号，请输入账号密码解锁资源。</p> : null}
-          <label>用户名<input name="username" autoComplete="username" minLength={3} maxLength={32} value={unlockUsername ?? username} disabled={Boolean(unlockUsername)} onChange={(event) => { edited.current = true; setUsername(event.target.value); }} required /></label>
+          <label>账号 ID<input name="username" autoComplete="username" minLength={3} maxLength={32} value={unlockUsername ?? username} disabled={Boolean(unlockUsername)} onChange={(event) => { edited.current = true; setUsername(event.target.value); }} required /></label>
           <label>密码<input name="password" autoComplete={register ? 'new-password' : 'current-password'} type="password" minLength={register ? 12 : undefined} value={password} onChange={(event) => { edited.current = true; setPassword(event.target.value); }} required /></label>
           {creating ? <label>确认密码<input name="confirm-password" autoComplete="new-password" type="password" minLength={12} value={confirm} aria-invalid={mismatch} onChange={(event) => { edited.current = true; setConfirm(event.target.value); }} required />
-            {mismatch ? <span className={styles.fieldError} role="alert">两次输入的密码不一致</span> : null}</label> : null}
+          </label> : null}
-          {creating ? <p className={styles.note}>密码至少 12 个字符。密码用于在本机加密你的资源保险库，<strong>忘记后无法找回</strong>，请妥善保管。</p> : null}
+          {creating ? <ul className={styles.rules} aria-label="注册要求">
+            {rules.map((rule) => <li key={rule.text} data-met={rule.met}><span aria-hidden="true">{rule.met ? '✓' : '○'}</span>{rule.text}<span className={styles.srOnly}>{rule.met ? '，已满足' : '，未满足'}</span></li>)}
+          </ul> : null}
+          {creating ? <p className={styles.note}>账号 ID 是登录用的唯一标识，不是显示名称；显示名称可在登录后的个人资料里设置。密码用于在本机加密你的资源保险库，<strong>忘记后无法找回</strong>，请妥善保管。</p> : null}
           <label className={styles.remember}><input type="checkbox" checked={remember} onChange={(event) => setRemember(event.target.checked)} />记住账号和密码（本机）</label>
           <div className={styles.actions}>
-            <Button type="submit" variant="primary" disabled={busy || !channelsReady || !sharesReady || mismatch}>{busy ? '处理中…' : !channelsReady || !sharesReady ? '正在读取本机资源…' : unlockUsername ? '解锁资源' : register ? '创建账号' : '登录并同步'}</Button>
+            <Button type="submit" variant="primary" disabled={busy || !channelsReady || !sharesReady || unmet}>{busy ? '处理中…' : !channelsReady || !sharesReady ? '正在读取本机资源…' : unlockUsername ? '解锁资源' : register ? '创建账号' : '登录并同步'}</Button>
             {variant !== 'auth' ? <Button variant="ghost" onClick={() => { edited.current = true; setRegister((value) => !value); setMessage(''); }}>{register ? '已有账号' : '创建账号'}</Button> : null}
             {saved ? <Button variant="ghost" disabled={busy} onClick={() => { void clearSaved(); }}>清除本机保存</Button> : null}
             {!register && !unlockUsername ? <Button variant="ghost" disabled={busy || !username || !passkeysAvailable()} onClick={() => {

web/src/store/reduce.ts

@@ -20,7 +20,7 @@ export interface WorkspaceData {
   locations: Record<string, { threadId: string; folderId?: string; authorAccount?: string }>;
   byId: Record<string, Item>;
   authors: Record<string, SenderInfo>;
-  /** 空间成员的资料(昵称、头像),按用户名索引 */
+  /** 空间成员的资料(昵称、头像),按账号 ID 索引 */
   people: Record<string, SenderInfo>;
   /** 新的在前 */
   order: string[];