fix(groups): finish Phase 1 — MNP root management, upload targets, eject state

Review of the Phase 1 commit found the RO/RW model sound but three paths
unfinished, each of which broke the flow the phase exists to deliver. Plus
29 test failures it introduced and no coverage for anything it added.

Uploads went to the wrong directory. The node read a `root` field on
file_upload that no client ever sent, so every upload landed in the first
writable root while the Files toolbar offered its button based on the root
being browsed — with two writable roots, uploading from one wrote into the
other. Files now names the root it is showing; Chat names one chosen in the
shell (an operator-configured directory arrives in Phase 2); the node refuses
an unknown name rather than falling back, and refuses read-only and ejected
roots by code.

Shared directories were unreachable on the web. The table read its roots
only from the loopback API, which resolves to "not available" in a browser,
so the section rendered for nobody there — while the Uploads controls it
replaced had worked — and the transport.updateRoot/ejectRoot/plugRoot methods
beside it were dead. MNP is now the path, loopback the fallback for a local
node with no live connection, and adding a root over MNP takes a typed path
since no web page can browse a remote disk.

Ejecting updated nobody's screen. transport.js resolves an admin ack against
the pending request and returns, which is right for every op whose caller
knows the value it chose; the root acks carry state only the node can compute,
so the operator who clicked Eject was the one client that never saw it happen.
And the ejected flag reached roster.db but was never read back, so a restart
undid it and the next scan read an empty mount point as an erased library.

Also: the member-upload endpoint answered 200 and did nothing (removed); the
wizard ignored the first root's RW switch; reload compared roots on name and
path, so editing writable in node.toml did nothing; the table had no path
column, which is the only thing separating two libraries sharing a basename;
apps_enabled normalisation differed between the two sides of a signed subject.

Tests: eject/plug, per-root upload refusal and the node.toml rewrite had no
coverage at all. test_member_upload_policy.py is replaced by
test_root_writable_policy.py — it tested a removed feature — and every
property worth keeping from it moved rather than being dropped.

Docs: draft-v6 structural decision 9 is annotated as superseded (the operator
can no longer have a directory only they may write to — a real capability
removed, flagged rather than hidden), the man page documents the root verb and
the RO/RW fields, and refactor-groups.md §7b records what the plan got wrong.

Suite: 41 failures before, 13 after — all 13 pre-existing on main.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011pvMdvLBG92jyhvD5pD6us

1 files changed, 13 insertions, 1 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 b80ac08..f62d6fd 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
@@ -165,6 +165,10 @@ export default {
   'device.approve_btn': 'Approve',
   'device.approved': 'Device linked.',
   'group.root_unavailable': '(不可用 — 驱动器已断开连接)',
+  'group.root_plug': '重新接入',
+  'group.root_eject': '弹出',
+  'group.root_writable': '读写',
+  'group.root_ejected': '(已弹出)',
   'group.view': '查看',
   'group.delete': '删除',
   'group.delete_confirm': '删除 {name}？',
@@ -189,6 +193,7 @@ export default {
   'chat.placeholder': '输入消息…',
   'chat.send': '发送',
   'chat.attach': '添加附件',
+  'chat.attach_read_only': '没有可写的共享目录 — 附件已停用',
 
   // Video player
   'video.loading': '正在加载 {name}…',
@@ -699,10 +704,16 @@ export default {
   'node.roots': '目录',
   'node.add_root': '添加目录',
   'node.remove_root': '移除',
+  'node.root_no_signing_key': '没有可用的签名密钥 — 请先将本设备与节点配对',
+  'node.root_no_route': '无法连接到节点 — 请先连接，或在运行该节点的机器上使用应用',
+  'node.root_remove_last': '每个群组至少需要一个目录',
+  'node.root_path_hint': '托管该群组的机器上，节点所看到的路径。',
+  'node.root_path_placeholder': '/home/user/Media',
+  'node.root_path': '路径',
+  'node.directory': '目录',
   'node.root_added': '目录已添加。',
   'node.root_remove_confirm': '从此群组中移除"{name}"？',
   'node.root_removed': '目录已移除。建议重启以更新索引。',
-  'node.upload_root': '上传目录',
   'node.attach_group': '添加群组',
   'node.attach_pick': '要托管的群组',
   'node.attach_dir': '共享目录',
@@ -788,6 +799,7 @@ export default {
   'settings_node.photo_roots_save': '保存',
   'settings_node.shared_directories_title': '共享目录',
   'settings_node.shared_directories_hint': '与此群组共享的文件夹。切换读写以允许上传，标记为可移除用于外置驱动器。',
+  'settings_node.roots_offline_hint': '未连接到节点 — 变更将通过本地节点进行，并在其下次重新加载时生效。',
   'settings_node.directories_title': '应用目录',
   'settings_node.directories_hint': '共享文件夹，以及“视频”“音乐”和“照片”应用各自使用哪个（些）作为入口。',