feat: D.6 first-run wizard — detect, start, link, group, gek-init, pair

Desktop client guides new users through the full onboarding sequence
without a terminal: detect local node → start daemon (systemd with
direct-start fallback for dev) → link node key to hub → create group →
attach directories → gek-init → operator pair.

- node:detect returns configured field to distinguish missing vs stopped
- node:start tries systemctl first, checks is-active, falls back to
  spawning the binary directly when the unit crashes (dev mode)
- probeNode() extracts the shared config→token→fetch pattern
- SetupWelcome on empty HomePage links to /create-group
- CreateGroupWizard step 0 handles node detection and start
- platform.js exposes node.installed() and node.start()
- 12 setup.* i18n keys added to all 10 locales
- Integration test for node:start fallback logic

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 14 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 549b77e..bab41e1 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
@@ -438,4 +438,18 @@ export default {
   'group.unmute': 'Unmute notifications',
   'profile.title': '个人资料',
   'usermenu.profile': '个人资料',
+
+  // First-run setup wizard
+  'setup.welcome_title': '欢迎使用 MeshBay',
+  'setup.welcome_message': '您的 node 在您自己的机器上加密存储文件。让我们启动它并创建您的第一个群组。',
+  'setup.node_detected': '已检测到本地 node，正在运行。',
+  'setup.node_not_running': '您的 node 已安装但未运行。',
+  'setup.node_start': '启动 node',
+  'setup.node_starting': '正在启动 node…',
+  'setup.node_started': 'Node 已启动。',
+  'setup.node_not_installed': '此机器上未安装 meshbay-node。',
+  'setup.node_install_hint': '请使用包管理器安装，然后回到此处。',
+  'setup.skip': '跳过 — 不使用本地 node 创建群组',
+  'setup.create_group': '创建第一个群组',
+  'setup.dismiss': '跳过设置',
 };