Simplify mobile agent configuration (#3424)

packages/app/src/hooks/use-keyboard-visibility.native.ts

@@ -0,0 +1,5 @@
+import { useKeyboardState } from "react-native-keyboard-controller";
+
+export function useKeyboardVisibility(): boolean {
+  return useKeyboardState((state) => state.isVisible);
+}

packages/app/src/hooks/use-keyboard-visibility.ts

@@ -0,0 +1,3 @@
+export function useKeyboardVisibility(): boolean {
+  return false;
+}