Make back button exist

app/(tabs)/index.jsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useState } from "react";
 import { StyleSheet, FlatList, Image, ActivityIndicator } from "react-native";
-import { Link } from "expo-router";
+import { Stack, Link } from "expo-router";
 
 import dayjs from "dayjs";
 import calendar from "dayjs/plugin/calendar";

app/_layout.tsx

@@ -21,7 +21,7 @@ export {
 
 export const unstable_settings = {
   // Ensure that reloading on `/modal` keeps a back button present.
-  initialRouteName: "(tabs)",
+  initialRouteName: "/(tabs)",
 };
 
 // Prevent the splash screen from auto-hiding before asset loading is complete.

components/PhotometryPlot.jsx

@@ -198,6 +198,10 @@ function PhotometryPlot({ dm, photometry, height, width }) {
     return <Text>Loading photometry...</Text>;
   }
 
+  if (data.length === 0) {
+    return <Text>No photometry available...</Text>;
+  }
+
   const xDomain = photStats.days_ago.range;
   const yDomain = photStats.mag.range;
 

components/PostFollowupRequest.jsx

@@ -17,7 +17,6 @@ function PostFollowupRequest({ sourceId = null }) {
   const [selectedAllocationId, setSelectedAllocationId] = useState(null);
 
   const [filteredAllocationList, setFilteredAllocationList] = useState([]);
-  const [settingFilteredList, setSettingFilteredList] = useState(false);
   const [requestType, setRequestType] = useState("triggered");
 
   useEffect(() => {
@@ -84,7 +83,6 @@ function PostFollowupRequest({ sourceId = null }) {
   // instrument form params with a non null formSchema
   useEffect(() => {
     async function filterAllocations() {
-      setSettingFilteredList(true);
       if (requestType === "triggered") {
         const filtered = (allocationList || []).filter(
           (allocation) =>
@@ -107,18 +105,16 @@ function PostFollowupRequest({ sourceId = null }) {
         );
         setFilteredAllocationList(filtered);
       }
-      setSettingFilteredList(false);
     }
     if (
       allocationList !== null &&
       allocationList.length > 0 &&
       instrumentForms !== null &&
-      Object.keys(instrumentForms).length > 0 &&
-      settingFilteredList === false
+      Object.keys(instrumentForms).length > 0
     ) {
       filterAllocations();
     }
-  }, [allocationList, instrumentForms, settingFilteredList, requestType]);
+  }, [allocationList, instrumentForms, requestType]);
 
   useEffect(() => {
     if (

components/utils/notifications.native.js

@@ -44,7 +44,7 @@ async function registerForPushNotificationsAsync() {
     alert("Must use physical device for Push Notifications");
   }
 
-  return token.data;
+  return token?.data;
 }
 
 export { Notifications, registerForPushNotificationsAsync };