initial

apps/mobile/app/(app)/_layout.tsx

@@ -0,0 +1,9 @@
+// Authenticated app group layout.
+// Gate on session: if no session, redirect to `/`.
+// Add tab bar / drawer nav here once we have more than one screen.
+
+import { Stack } from 'expo-router';
+
+export default function AppLayout() {
+  return <Stack screenOptions={{ headerShown: true }} />;
+}

apps/mobile/app/(app)/chats.tsx

@@ -0,0 +1,18 @@
+// Chats list placeholder.
+// Milestone 1 TODO: render list of conversations, decrypt last-message preview,
+// navigate to a conversation screen on tap.
+
+import { StyleSheet, Text, View } from 'react-native';
+
+export default function Chats() {
+  return (
+    <View style={styles.container}>
+      <Text style={styles.text}>Chats — placeholder</Text>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: { flex: 1, alignItems: 'center', justifyContent: 'center', backgroundColor: '#0b0b0f' },
+  text: { color: '#fff' },
+});