SwiftUI + MVVM app shell backed by a deterministic fake bridge.
Auth, chat list, folder selector, chat detail, compose bar, profile sheet, and account switcher shell.
iOS-oriented storage boundaries: Keychain-shaped credential API and Application Support account paths.

Build and smoke-test the portable shell:

cd apps/ios/TeleTuiIOS
swift run TeleTuiIOSSmokeTests

Simulator/device build is currently blocked on this machine because xcodebuild -version fails with:

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance