add a telegram-style bottom tab bar to the main screen

- 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.

Luma.xcodeproj/xcshareddata/xcschemes/Luma.xcscheme

@@ -64,6 +64,17 @@
                ReferencedContainer = "container:Luma.xcodeproj">
             </BuildableReference>
          </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "A086B6D25E7969CB643F1C8A"
+               BuildableName = "LumaUITests.xctest"
+               BlueprintName = "LumaUITests"
+               ReferencedContainer = "container:Luma.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
       </Testables>
       <CommandLineArguments>
       </CommandLineArguments>