Rename setups and add provider reauthentication

app/androidApp/src/main/kotlin/com/example/aiapp/AppRoot.kt

@@ -32,9 +32,9 @@ import kotlinx.coroutines.withContext
  * One `when` rather than a navigation library: a handful of screens, with [Screen.Main] as the root
  * and the back button the only other way between them.
  *
- * Import, models and setups are tabs inside [MainScreen] -- four views of the same backend, none of
- * them a step down from another -- and what is left here is only what genuinely is a step down: one
- * session, spawning one, and settings.
+ * Import, models and machines are tabs inside [MainScreen] -- four views of the same backend, none
+ * of them a step down from another -- and what is left here is only what genuinely is a step down:
+ * one session, spawning one, and settings.
  */
 private sealed class Screen {
     /**