Fix and enhance comment editor monospace toggle (#36181)

Fixes: https://github.com/go-gitea/gitea/issues/36175

1. Correctly apply setting on textareas spawned by comment edit
3. When changing the setting, apply it to all textareas on the current page

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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/index.ts

@@ -6,6 +6,7 @@ import './bootstrap.ts';
 import './globals.ts';
 
 import './webcomponents/index.ts';
+import './modules/user-settings.ts'; // templates also need to use localUserSettings in inline scripts
 import {onDomReady} from './utils/dom.ts';
 
 // TODO: There is a bug in htmx, it incorrectly checks "readyState === 'complete'" when the DOM tree is ready and won't trigger DOMContentLoaded