Revert "changed night mode to dark theme"

This reverts commit 81113f2.

Author: aritroCoder

src/reduxTypes.js

@@ -372,7 +372,7 @@ export type ThemeName = 'light' | 'dark';
  * To determine the actual theme to show the user, use a ThemeName;
  * see there for details.
  */
-export type ThemeSetting = 'default' | 'dark';
+export type ThemeSetting = 'default' | 'night';
 
 /** What browser the user has set to use for opening links in messages.
  *

src/settings/SettingsScreen.js

@@ -35,12 +35,12 @@ export default function SettingsScreen(props: Props): Node {
   const { navigation } = props;
 
   const handleThemeChange = useCallback(() => {
-    dispatch(setGlobalSettings({ theme: theme === 'default' ? 'dark' : 'default' }));
+    dispatch(setGlobalSettings({ theme: theme === 'default' ? 'night' : 'default' }));
   }, [theme, dispatch]);
 
   return (
     <Screen title="Settings">
-      <SwitchRow label="Dark theme" value={theme === 'dark'} onValueChange={handleThemeChange} />
+      <SwitchRow label="Dark theme" value={theme === 'night'} onValueChange={handleThemeChange} />
       <SwitchRow
         label="Open links with in-app browser"
         value={shouldUseInAppBrowser(browser)}

src/settings/__tests__/settingsReducer-test.js

@@ -79,12 +79,12 @@ describe('settingsReducer', () => {
     test('changes value of a key', () => {
       const action = deepFreeze({
         type: SET_GLOBAL_SETTINGS,
-        update: { theme: 'dark' },
+        update: { theme: 'night' },
       });
 
       const expectedState = {
         ...baseState,
-        theme: 'dark',
+        theme: 'night',
       };
 
       const actualState = settingsReducer(baseState, action);