Ok it might work

apk/app/(auth)/login.tsx

@@ -1,6 +1,7 @@
 import React, { useState } from "react";
 import { View, Text, TextInput, TouchableOpacity, StyleSheet } from "react-native";
 import { useAuth } from "@/context/auth-context";
+import { router } from "expo-router";
 
 export default function AuthScreen() {
   const [isLogin, setIsLogin] = useState(true);
@@ -17,9 +18,12 @@ function LoginScreen({ onSwitch }) {
   const [password, setPassword] = useState("");
   const { login } = useAuth();
 
-  const handleLogin = () => {
-    console.log("Login ->", { email, password });
-    login(email, password);
+  const handleLogin = async () => {
+    const loginResult = await login(email, password);
+    if (loginResult) {
+        console.log("Login successful");
+        router.replace("/(tabs)");
+    }
   };
 
   return (

apk/app/(tabs)/_layout.tsx

@@ -1,5 +1,25 @@
 import { Tabs } from "expo-router";
+import { Ionicons } from "@expo/vector-icons";
 
 export default function TabsLayout() {
-  return <Tabs />;
-}
+  return (
+    <Tabs
+      screenOptions={{
+        headerShown: false,
+      }}
+    >
+      <Tabs.Screen name="index" options={{ 
+        title: "Birthdays",
+        tabBarIcon: ({ color, size }) => (
+          <Ionicons name="gift" size={size} color={color} />
+        ),
+        }} />
+      <Tabs.Screen name="settings" options={{ 
+        title: "Settings",
+        tabBarIcon: ({ color, size }) => (
+          <Ionicons name="settings" size={size} color={color} />
+        ),
+        }} />
+    </Tabs>
+  );
+}

apk/app/(tabs)/index.tsx

@@ -14,7 +14,11 @@ export default function HomeScreen() {
         <View style={styles.actionsContainer}>
           <Text style={styles.title}>Upcoming Birthdays</Text>
           <TouchableOpacity
-            onPress={() => router.push("/add")}
+            onPress={() => {
+              router.push("/add");
+            }
+            }
+
             style={styles.addButton}
           >
             <Text style={styles.addButtonText}>+</Text>

apk/app/(tabs)/settings.tsx

@@ -0,0 +1,148 @@
+import React, { useState } from "react";
+import { StyleSheet, Text, View, TouchableOpacity, Alert } from "react-native";
+import { SafeAreaView } from "react-native-safe-area-context";
+
+import { useRouter } from "expo-router";
+import { useAuth } from "@/context/auth-context";
+
+export default function SettingsScreen() {
+  const router = useRouter()
+  const { logout } = useAuth();
+  const [theme, setTheme] = useState("light"); // light | dark | system
+
+  const handleLogout = () => {
+    Alert.alert("Logout", "Are you sure you want to logout?", [
+      { text: "Cancel", style: "cancel" },
+      {
+        text: "Logout",
+        style: "destructive",
+        onPress: () => {
+          // TODO: clear auth state here
+          router.replace("/login");
+            logout();
+        },
+      },
+    ]);
+  };
+
+  const toggleTheme = (value) => {
+    setTheme(value);
+    // TODO: persist theme (AsyncStorage / context / zustand)
+  };
+
+  return (
+    <SafeAreaView style={styles.screen} edges={["top", "bottom"]}>
+      <View style={styles.content}>
+        
+        <Text style={styles.title}>Settings</Text>
+
+        {/* Theme Selector */}
+        <View style={styles.section}>
+          <Text style={styles.sectionTitle}>Theme</Text>
+
+          <View style={styles.row}>
+            <ThemeButton
+              label="Light"
+              active={theme === "light"}
+              onPress={() => toggleTheme("light")}
+            />
+            <ThemeButton
+              label="Dark"
+              active={theme === "dark"}
+              onPress={() => toggleTheme("dark")}
+            />
+            <ThemeButton
+              label="System"
+              active={theme === "system"}
+              onPress={() => toggleTheme("system")}
+            />
+          </View>
+        </View>
+
+        {/* Logout */}
+        <View style={styles.section}>
+          <Text style={styles.sectionTitle}>Account</Text>
+
+          <TouchableOpacity style={styles.logoutButton} onPress={handleLogout}>
+            <Text style={styles.logoutText}>Log Out</Text>
+          </TouchableOpacity>
+        </View>
+
+      </View>
+    </SafeAreaView>
+  );
+}
+
+function ThemeButton({ label, active, onPress }) {
+  return (
+    <TouchableOpacity
+      onPress={onPress}
+      style={[styles.themeButton, active && styles.themeButtonActive]}
+    >
+      <Text style={[styles.themeText, active && styles.themeTextActive]}>
+        {label}
+      </Text>
+    </TouchableOpacity>
+  );
+}
+
+const styles = StyleSheet.create({
+  screen: {
+    flex: 1,
+    backgroundColor: "#fff",
+  },
+  content: {
+    flex: 1,
+    paddingHorizontal: 16,
+    paddingTop: 12,
+  },
+  title: {
+    fontSize: 24,
+    fontWeight: "bold",
+    marginBottom: 20,
+  },
+
+  section: {
+    marginBottom: 24,
+  },
+  sectionTitle: {
+    fontSize: 16,
+    fontWeight: "600",
+    marginBottom: 10,
+  },
+
+  row: {
+    flexDirection: "row",
+    gap: 10,
+  },
+
+  themeButton: {
+    paddingVertical: 8,
+    paddingHorizontal: 12,
+    borderRadius: 8,
+    borderWidth: 1,
+    borderColor: "#ccc",
+  },
+  themeButtonActive: {
+    backgroundColor: "#111",
+    borderColor: "#111",
+  },
+  themeText: {
+    color: "#333",
+    paddingHorizontal: 5,
+  },
+  themeTextActive: {
+    color: "#fff",
+  },
+
+  logoutButton: {
+    padding: 14,
+    borderRadius: 10,
+    backgroundColor: "#ff3b30",
+    alignItems: "center",
+  },
+  logoutText: {
+    color: "#fff",
+    fontWeight: "600",
+  },
+});