settings: rename cssNight.js to cssDark.js

Rename cssNight.js to cssDark.js and update required imports

Author: aritroCoder

docs/howto/new-feature.md

@@ -296,7 +296,7 @@ list, which we show in a WebView.
      type.
 
  * Your new feature may require some new CSS to style the new HTML.
-   See `src/webview/static/base.css` and `src/webview/css/cssNight.js`.
+   See `src/webview/static/base.css` and `src/webview/css/cssDark.js`.
 
  * If your new feature involves any interaction inside the message
    list, it may require some JS logic running inside the WebView.

src/webview/css/css.js

@@ -3,7 +3,7 @@ import { Platform } from 'react-native';
 import type { ThemeName } from '../../types';
 import cssPygments from './cssPygments';
 import cssEmojis from './cssEmojis';
-import cssNight from './cssNight';
+import cssDark from './cssDark';
 import type { ServerEmojiData } from '../../api/modelTypes';
 
 /**
@@ -27,7 +27,7 @@ export default (theme: ThemeName, serverEmojiData: ServerEmojiData | null): stri
 <link rel='stylesheet' type='text/css' href='./base.css'>
 <link rel='stylesheet' type='text/css' href='./katex/katex.min.css'>
 <style>
-${theme === 'dark' ? cssNight : ''}
+${theme === 'dark' ? cssDark : ''}
 ${cssPygments(theme === 'dark')}
 ${cssEmojis(serverEmojiData)}
 </style>