Tabs & Scaffolding: How Home Ties It Together

The tab bar isn't a system component

Unlike iOS's TabView, PawWalk's bottom tab bar in HomeScreen.kt isn't a built-in Compose or Material 3 component — it's hand-built from pieces you already know: a Row, a RoundedCornerShape background, and a clickable per tab. That's normal in Compose: when the built-in NavigationBar doesn't match a custom design (like PawWalk's pill-shaped, floating HUD bar), you compose your own from primitives.