feat: shortcut recorder, configurable terminal toolbar, offline changelog

- Global shortcut setting: press-to-record input (Esc cancels, Backspace
  clears); requires a modifier or F-key so plain typing can't be hijacked
- Terminal toolbar: three settings-gated buttons — session-log record
  (default off), open logs dir (default off), open working directory
  (default on, new; local sessions only, cwd tracked via cd/OSC 7)
- Input suggestions + command history now default off, with a one-time
  migration that resets persisted true values for existing installs
- Settings dialog: fix broken scrolling — antd v6 renamed the Tabs scroll
  container to .ant-tabs-body-holder; theme gallery drops its nested
  scroll (single outer scrollbar)
- Offline changelog: CHANGELOG.md at repo root bundled via ?raw; About tab
  reads it first, network sources stay as fallback; scripts/sync-changelog.cjs
  merges RELEASE_NOTES.md per release (release.cjs fails without an entry)
- commands.ts history prefs default aligned with new off-by-default

src/preload/index.ts

@@ -80,6 +80,7 @@ const api: AppApi = {
   logStop: (sessionId: string) => ipcRenderer.invoke(Ipc.LOG_STOP, sessionId),
   listSessionLogs: () => ipcRenderer.invoke(Ipc.LOG_LIST),
   openLogsDir: () => ipcRenderer.send(Ipc.LOG_OPEN_DIR),
+  openDirectory: (dir: string) => ipcRenderer.invoke(Ipc.CWD_OPEN, dir),
 
   listConnections: () => ipcRenderer.invoke(Ipc.CONNECTIONS_LIST),
   saveConnection: (input: SshConnectionInput) => ipcRenderer.invoke(Ipc.CONNECTIONS_SAVE, input),