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/main/ipc.ts

@@ -1,6 +1,7 @@
-import { app, ipcMain } from 'electron'
+import { app, ipcMain, shell } from 'electron'
 import fontList from 'font-list'
 import { homedir } from 'os'
+import { statSync } from 'fs'
 import { Ipc, type AppInfo, type LayoutMeta, type PtyCreateOptions } from '../shared/ipc'
 import type { HostKeyAction, SessionOpenOptions, SshConnection, SshConnectionInput } from '../shared/connections'
 import { getLayout, listLayouts, saveLayout, deleteLayout } from './layouts'
@@ -181,4 +182,17 @@ export function registerIpc(): void {
     resolveCwd(current, arg)
   )
   ipcMain.handle(Ipc.CWD_REPORT, (_event, payload: string) => normalizeReportedCwd(payload))
+
+  // Open a local directory in the file manager. Validates the path is an
+  // existing directory so renderer-supplied values can't open arbitrary files.
+  ipcMain.handle(Ipc.CWD_OPEN, (_event, dir: unknown): boolean => {
+    if (typeof dir !== 'string' || dir === '') return false
+    try {
+      if (!statSync(dir).isDirectory()) return false
+    } catch {
+      return false
+    }
+    void shell.openPath(dir)
+    return true
+  })
 }