- Replace the sidebar-based MainChatView with MainTabView: a custom
bottom bar with Контакты / Звонки / Чаты / Настройки that looks the
same on iOS and macOS, and open chats via push navigation.
- Put the search field above the chat and contact lists (searchable on
iOS, an inline field on macOS) and add an aggregated call-history
screen backed by model.callHistoryMessages.
- Embed SettingsView as a tab, update verify.sh guards, and keep CI on
deterministic unit tests while the UI tests stay runnable manually.
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