feat: iCloud settings sync and cold-start return redesign
- Add iCloud key-value settings sync (engine/language/polish/Flow prefs);
API keys stay on-device. New "Sync settings via iCloud" toggle.
- Redesign cold-start handoff: bottom-bar left-to-right swipe guidance,
auto-dismiss on app switch, tap-anywhere to close, retained return link.
- Harden keyboard->app handoff with host-disconnected hint.
- Include prior Unreleased ASR fixes (route-change crash, fallback warning,
multi-utterance recognition, local ASR diagnostics).
Release 0.5.0 (build 18).
Rocky
128aab1b02