Build APK / build (push) Successful in 5m17s
Documents the app-lock layer and multi-account storage/session model in architecture.md/server.md, and adds a standards.md note that `flutter install` wipes app data (it uninstalls before installing) — use `adb install -r` for local test deploys instead. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>