feat: multi-language interface (zh-CN/zh-TW/en/ja), multilingual offline changelog, settings robustness

i18n
- shared/i18n: dependency-free t() with flat per-namespace dictionaries
  (common/settings/workspace/terminal/ssh/panels/main), zh-CN fallback
- language picker in Settings -> System; antd ConfigProvider locale follows it
- main process tracks the language too: tray menu, close prompt, ssh/sftp/
  zmodem errors and the log TUI marker are translated; tray rebuilds on change

changelog
- CHANGELOG.md (zh-CN canonical) + .zh-TW/.en/.ja, bundled via ?raw and read
  per interface language with per-version fallback to zh-CN (no network)
- sync-changelog.cjs merges RELEASE_NOTES[.<lang>].md per release; release.cjs
  refuses to publish without a zh-CN entry for the version

settings robustness
- closeAction 'ask' survives the sanitizer (was silently coerced to 'tray',
  which made the 'ask every time' option dead)
- highlight rules are repaired instead of dropped: string priority, 0/1
  enabled, missing fg colour; unknown fields preserved
- load-time warnings are written to settings-warnings.log (deduped, capped)

terminal/UI
- configurable terminal toolbar: open working directory (default on), session
  log recording (off), open logs folder (off)
- global shortcut field records key combos (modifier or F-key required)
- input suggestions + command history default to off, with a one-time reset
  migration for existing installs
- settings dialog scrolling fixed (antd v6 renamed the tabs container), theme
  gallery nested scrollbar removed, joined segmented pickers with readable
  selected-state text

tests: settings-store.mjs (15 checks) added; commands-store.mjs updated for
the new off-by-default history setting

src/shared/i18n/dicts/zh-CN/panels.ts

@@ -0,0 +1,36 @@
+/** 命名空间：panels（命令面板、会话日志面板、传输面板）。归属：SSH/面板维护者。 */
+const panels: Record<string, string> = {
+  // 命令面板
+  'panels.commands.sectionTitle': '命令',
+  'panels.commands.target': '发送目标',
+  'panels.commands.targetSsh': 'SSH 服务器',
+  'panels.commands.targetTerminal': '终端',
+  'panels.commands.tabHistory': '历史',
+  'panels.commands.tabLibrary': '命令库',
+  'panels.commands.historyTitle': '历史命令',
+  'panels.commands.clearTitle': '清空全部命令历史？',
+  'panels.commands.clear': '清空',
+  'panels.commands.noHistory': '暂无历史命令',
+  'panels.commands.loading': '加载中…',
+  'panels.commands.libraryTitle': '命令库',
+  'panels.commands.libraryEmpty': '命令库为空',
+  'panels.commands.add': '新增命令',
+  'panels.commands.name': '名称',
+  'panels.commands.optional': '(可选)',
+  'panels.commands.command': '命令',
+  'panels.commands.commandPlaceholder': '如 ls -la',
+  'panels.commands.note': '备注',
+  'panels.commands.deleteTitle': '删除该命令？',
+  'panels.commands.deleteAria': '删除命令',
+
+  // 传输面板
+  'panels.transfer.failed': '传输失败',
+  'panels.transfer.cancelled': '已取消',
+  'panels.transfer.done': '传输完成',
+  'panels.transfer.uploading': '上传中',
+  'panels.transfer.downloading': '下载中',
+  'panels.transfer.zmodemUploading': 'ZMODEM 上传中',
+  'panels.transfer.zmodemDownloading': 'ZMODEM 下载中'
+}
+
+export default panels