0061 — Mobile keeps React Navigation 7 and native tabs; one app - Stackra

Context

0011 rejects expo-router in favour of code-based React Navigation, and this ADR is consistent with it. The mobile app wants platform-native tab bars, including iOS Liquid Glass, which react-native-bottom-tabs provides. Support is verified in its documentation but not yet built with Xcode 26.

Decision

Mobile navigation is React Navigation 7, fed by the adapter in 0053.
Tabs use react-native-bottom-tabs (native tabs, Liquid Glass, minimizeBehavior, search role).
There is one mobile app. Products that need variants use compile-time modules later (TODO), not separate apps.
A build with Xcode 26 must succeed before this ADR is Accepted.

Consequences

Native look and feel on iOS and Android.
A native-module dependency to track on each Expo SDK upgrade.

Enforcement

Planned — a CI build of the iOS app on Xcode 26 and a Maestro smoke flow through the tab bar.

Supersedes and sources

Supersedes: none. Consistent with 0011. Sources: owner decision in chat, 2026-10-19.