feat: a group can be left out of Search, and Search tries every node

`search_listed` is a per-group setting on the node, changed by a signed
operator op and carried in the sealed handshake ack. Search reads it after
the handshake and stops there: no index is fetched, cached or merged, in any
of the four views, and the page says how many groups it left out. The switch
is a "Search" section in the group's settings, shown to the operator.

Absent means listed, at every layer: roster default, ack default, and the
client only drops a group on an explicit `false` — so an upgrade or an older
node removes nothing from anyone's Search.

It is a listing preference and protects nothing: the node serves the same
index to Search and to the group page and cannot tell them apart, every
member lists the group by opening it, and a client that ignores the flag
lists it in Search too. Design §9.11 says so, so it is never described as
private. The cost is one handshake per unlisted group, because only the node
knows the setting.

Search also took `nodes[0]` twice — for the index and for the pooled
connection — the defect 4cce50f fixed on the group page only. One
`connectToGroup` now walks the list the same way: a refusal about this
browser stops, `not_hosted` or a failed connection moves on.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XuNrwLf5EFWCMHzfoEvnpm

1 files changed, 4 insertions, 0 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
index cc22a70..3e7c1c9 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
@@ -682,6 +682,7 @@ export default {
   'search.hint': '输入关键词搜索所有群组。',
   'search.indexing': '正在索引 {done} / {total} 个群组…',
   'search.unreachable': { other: '{n} 个群组无法连接' },
+  'search.unlisted': { other: '{n} 个群组未在搜索中显示——打开群组即可浏览' },
   'search.n_sources': { other: '{n} 个来源' },
   'search.view_files': '文件',
   'search.view_videos': '视频',
@@ -869,6 +870,9 @@ export default {
   'settings_node.roots': '共享目录',
   'settings_node.scan_title': '扫描',
   'settings_node.scan_hint': 'node 多久重新检查一次目录以发现可能错过的变化，以及文件变化后等待多久才建立索引。',
+  'settings_node.search_listed_title': '搜索',
+  'settings_node.search_listed_label': '在搜索中显示此群组',
+  'settings_node.search_listed_hint': '关闭后，此群组的文件不会出现在成员的跨群组搜索中。成员打开群组后仍可看到全部内容：这只是将其移出全局列表，不对任何人隐藏任何内容。',
   'settings_node.scan_reconcile_label': '重新检查间隔（分钟）',
   'settings_node.scan_debounce_label': '变化后的等待时间（秒）',
   'settings_node.scan_save': '保存',