Add show timestamp/seconds and fullscreen options to action page (#24876)

Part of #24728

- The timestamp shows local time and is parsed by `date.toLocaleString`;
- "show seconds" and "show timestamps" are mutually exclusive, and they
can be both hidden.


89531e54-37b7-4400-a6a0-bb3cc69eb6f5

Update for timestamp format:

<img width="306" alt="Screen Shot 2023-05-25 at 09 07 47"
src="2d99768d-d39c-4c9e-81a2-7bc7470399dd">

---------

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

web_src/js/utils.js

@@ -60,7 +60,7 @@ export function parseUrl(str) {
 }
 
 // return current locale chosen by user
-function getCurrentLocale() {
+export function getCurrentLocale() {
   return document.documentElement.lang;
 }