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/ja.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
index cfd65da..7890ab7 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
@@ -166,6 +166,10 @@ export default {
   'device.approve_btn': 'Approve',
   'device.approved': 'Device linked.',
   'group.root_unavailable': '(利用不可 — ドライブが切断されています)',
+  'group.root_plug': '接続する',
+  'group.root_eject': '取り外す',
+  'group.root_writable': '読み書き可',
+  'group.root_ejected': '(取り外し済み)',
   'group.view': '表示',
   'group.delete': '削除',
   'group.delete_confirm': '{name} を削除しますか？',
@@ -191,6 +195,7 @@ export default {
   'chat.placeholder': 'メッセージを入力…',
   'chat.send': '送信',
   'chat.attach': 'ファイルを添付',
+  'chat.attach_read_only': '書き込み可能な共有ディレクトリがありません — 添付は無効です',
 
   // Video player
   'video.loading': '{name} を読み込んでいます…',
@@ -712,10 +717,16 @@ export default {
   'node.roots': 'ディレクトリ',
   'node.add_root': 'ディレクトリを追加',
   'node.remove_root': '削除',
+  'node.root_no_signing_key': '署名鍵がありません — 先にこの端末をノードとペアリングしてください',
+  'node.root_no_route': 'ノードへの経路がありません — 接続するか、ノードを動かしているマシンでアプリを使ってください',
+  'node.root_remove_last': 'グループには少なくとも 1 つのディレクトリが必要です',
+  'node.root_path_hint': 'このグループをホストしているマシン上で、ノードから見たパスです。',
+  'node.root_path_placeholder': '/home/user/Media',
+  'node.root_path': 'パス',
+  'node.directory': 'ディレクトリ',
   'node.root_added': 'ディレクトリを追加しました。',
   'node.root_remove_confirm': '「{name}」をこのグループから削除しますか？',
   'node.root_removed': 'ディレクトリを削除しました。インデックスを更新するために再起動を推奨します。',
-  'node.upload_root': 'アップロード',
   'node.attach_group': 'グループを追加',
   'node.attach_pick': 'ホストするグループ',
   'node.attach_dir': '共有ディレクトリ',
@@ -801,6 +812,7 @@ export default {
   'settings_node.photo_roots_save': '保存',
   'settings_node.shared_directories_title': '共有ディレクトリ',
   'settings_node.shared_directories_hint': 'このグループと共有されているフォルダー。読み書きを切り替えてアップロードを許可し、外付けドライブにはリムーバブルを設定します。',
+  'settings_node.roots_offline_hint': 'ノードに接続していません — 変更はローカルノード経由で行われ、次回の再読み込みで反映されます。',
   'settings_node.directories_title': 'アプリのディレクトリ',
   'settings_node.directories_hint': '共有フォルダと、動画・音楽・写真の各アプリがそれぞれの起点として使用するフォルダです。',