feat(web)!: sign in before joining a space and drop the stranger option

Opening a space link while signed out shows the sign-in page first and keeps
the link in memory. The channel settings no longer offer the stranger switch,
and the client supports API contract major 8.

web/src/features/channel/ChannelSettingsSheet.tsx

@@ -16,7 +16,7 @@ interface Props {
 
 export function ChannelSettingsSheet(props: Props) {
   const { info, error, load } = useServerSettings();
-  if (!info || props.channel.ttlSeconds === undefined || props.channel.membersCanUpload === undefined || props.channel.maxDownloads === undefined || props.channel.joinPolicy === undefined || props.channel.allowGuests === undefined)
+  if (!info || props.channel.ttlSeconds === undefined || props.channel.membersCanUpload === undefined || props.channel.maxDownloads === undefined || props.channel.joinPolicy === undefined)
     return <Sheet title="空间设置" onClose={props.onClose}><p role={error ? 'alert' : 'status'}>{error ?? '正在读取空间设置…'}</p>
       {error ? <Button onClick={() => { void load().catch(() => {}); }}>重试</Button> : null}</Sheet>;
   return <SettingsForm {...props} info={info} />;
@@ -29,7 +29,6 @@ function SettingsForm({ channel, onClose, onSave, info }: Props & { info: Server
   const [ttlSeconds, setTtlSeconds] = useState(channel.ttlSeconds!);
   const [fileMaxDownloads, setFileMaxDownloads] = useState(channel.maxDownloads!);
   const [joinPolicy, setJoinPolicy] = useState<'open' | 'invite'>(channel.joinPolicy!);
-  const [allowGuests, setAllowGuests] = useState(channel.allowGuests!);
   const [joinPassword, setJoinPassword] = useState('');
   const [clearPassword, setClearPassword] = useState(false);
   const [saving, setSaving] = useState(false);
@@ -42,7 +41,7 @@ function SettingsForm({ channel, onClose, onSave, info }: Props & { info: Server
     setSaving(true);
     setFailed(false);
     try {
-      await onSave({ name: name.trim(), maxMembers, membersCanUpload, ttlSeconds, fileMaxDownloads, joinPolicy, allowGuests,
+      await onSave({ name: name.trim(), maxMembers, membersCanUpload, ttlSeconds, fileMaxDownloads, joinPolicy,
         ...(clearPassword ? { joinPassword: '' } : joinPassword ? { joinPassword } : {}) });
       onClose();
     } catch {
@@ -87,10 +86,9 @@ function SettingsForm({ channel, onClose, onSave, info }: Props & { info: Server
 
         <label className={styles.field}><span>加入方式</span>
           <select value={joinPolicy} disabled={!owner} onChange={(event) => setJoinPolicy(event.target.value as 'open' | 'invite')}>
-            <option value="open">持链接加入</option><option value="invite">仅受邀账号加入</option>
+            <option value="open">登录后持链接加入</option><option value="invite">仅受邀账号加入</option>
           </select>
         </label>
-        <label className={styles.check}><input type="checkbox" checked={allowGuests} disabled={!owner || joinPolicy === 'invite'} onChange={(event) => setAllowGuests(event.target.checked)} /><span>允许未登录的陌生人加入</span></label>
         <label className={styles.field}><span>{channel.passwordRequired ? '更换空间加入密码' : '空间加入密码（可选）'}</span>
           <input type="password" autoComplete="new-password" minLength={8} maxLength={256} value={joinPassword} disabled={!owner || clearPassword} placeholder="至少 8 个字符，留空不修改" onChange={(event) => setJoinPassword(event.target.value)} />
           <span className={styles.note}>空间主及受邀用户无需加入密码。修改规则不移除已加入成员。</span>