crud for tasks + auth

app/(tabs)/_layout.tsx

@@ -0,0 +1,40 @@
+import { supabase } from "@/lib/supabase";
+import { Session } from "@supabase/supabase-js";
+import { Redirect, Tabs } from "expo-router";
+import { useEffect, useState } from "react";
+
+export default function TabLayout() {
+  const [session, SetSession] = useState<Session | null>(null)
+  const [loading, SetLoading] = useState(true);
+
+  useEffect(() => {
+    const loadSession = async () => {
+      const { data } = await supabase.auth.getSession();
+      SetSession(data.session ?? null);
+      SetLoading(false);
+    }
+    loadSession();
+
+    const { data: sub } = supabase.auth.onAuthStateChange((_event, newSession) => {
+      SetSession(newSession);
+      SetLoading(false);
+    });
+
+    return () => sub.subscription.unsubscribe();
+  }, []);
+
+  if (loading) {
+    return null;
+  }
+
+  if (!session) {
+    return <Redirect href="/createUser" />;
+  }
+
+  return (
+    <Tabs>
+      <Tabs.Screen name="index" options={{title: "Today"}} />
+      <Tabs.Screen name="tasks" options={{title: "Tasks"}} />
+    </Tabs>
+  );
+}