add episode download section

apps/expo/src/app/(downloads)/_layout.tsx

@@ -0,0 +1,14 @@
+import { Stack } from "expo-router";
+
+import { BrandPill } from "~/components/BrandPill";
+
+export default function Layout() {
+  return (
+    <Stack
+      screenOptions={{
+        headerTransparent: true,
+        headerRight: BrandPill,
+      }}
+    />
+  );
+}