Refresh queries when the app gains focus and when changing the language

template/src/navigation/RootNavigator.tsx

@@ -4,7 +4,9 @@ import {
   NativeStackNavigationProp,
   NativeStackScreenProps,
 } from '@react-navigation/native-stack';
-import React from 'react';
+import React, { useEffect, useRef } from 'react';
+import { useTranslation } from 'react-i18next';
+import { useQueryClient } from '@tanstack/react-query';
 import { HomeScreen } from '../screens/Home';
 import { ExampleBottomSheet } from '~/screens/bottom-sheets/ExampleBottomSheet';
 import { SecretConfigScreen } from '~/screens/SecretConfig';
@@ -24,10 +26,26 @@ export type RootStackScreenProps<Screen extends keyof RootStackParamList> =
 const Stack = createNativeStackNavigator<RootStackParamList>();
 
 function RootNavigator() {
+  const { i18n } = useTranslation();
+  const languageRef = useRef(i18n.language);
+  const queryClient = useQueryClient();
+
   const secretPanelEnabled = useApplicationConfiguration(
     'SECRET_PANEL_ENABLED'
   );
 
+  useEffect(() => {
+    if (i18n.language === languageRef.current) {
+      return;
+    }
+
+    // Evict everything from the cache but don't refetch anything. Queries will
+    // be refetched when they become "enabled" when their screen gains focus.
+    queryClient.invalidateQueries({
+      refetchType: 'none',
+    });
+  }, [queryClient, i18n.language]);
+
   return (
     <Stack.Navigator screenOptions={{ headerShown: false }}>
       <Stack.Screen name="Home" component={HomeScreen} />

template/src/navigation/index.tsx

@@ -4,11 +4,18 @@ import {
   DefaultTheme,
   DarkTheme,
 } from '@react-navigation/native';
+import { AppState } from 'react-native';
+import { focusManager } from '@tanstack/react-query';
 import RootNavigator from './RootNavigator';
 import { withBoundary } from '~/components/boundary';
 import { useColorSchemeValue } from '~/hooks/use-color-scheme-value';
 import { useKillswitch } from '~/hooks/use-killswitch';
 
+// Notify react-query when the focused state changes
+AppState.addEventListener('change', (appState) => {
+  focusManager.setFocused(appState === 'active');
+});
+
 function Navigation() {
   const theme = useColorSchemeValue([DefaultTheme, DarkTheme]);