fix: replace dead permission-refresh button with real Quit & Reopen

[Alfredoalv13]

Summary

• The permission banner's refresh button called `getScreenRecordingPermissionStatus`/`getAccessibilityPermissionStatus` again, but macOS caches those results for the life of the process - a grant made in System Settings is invisible until the app actually restarts. The button could never work, by construction.
• Closing the window doesn't quit an Electron app on macOS (`window-all-closed` is a no-op here), so reopening via the Dock just refocuses the same stale process - making this very hard for a tester to self-diagnose, as we found out first-hand this session.
• Replaced the dead refresh button with a "Quit & Reopen" button that calls a new `relaunch-app` IPC handler (`app.relaunch(); app.exit(0)`), which is the one thing that actually resolves this.

Test plan

• `tsc --noEmit` clean
• `npm test` - 94/94 files, 817/817 tests passing
• Manual: with Screen Recording/Accessibility freshly denied, click "Quit & Reopen" after granting in System Settings, confirm the app restarts and the banner clears without a manual Cmd+Q