Is your feature request related to a problem? Please describe.

We are using rabbitmq_tracing plugin and faced an issue - when opening log.file from admin->tracing->trace log files we see bad enconding for cyrillic symbols cause no charset is set by default.

Describe the solution you'd like

Maybe you should consider adding js function for opening file in new window:
in tracing.js add ( https://github.com/rabbitmq/rabbitmq-server/blob/main/deps/rabbitmq_tracing/priv/www/js/tracing.js )

function loadTextFile(node, file) {
  fetch('/api/trace-files/node/' + node + '/' + file)
    .then(response => response.text())
    .then(text => {
      const win = window.open();
      win.document.write('<pre style="word-wrap: break-word; white-space: pre-wrap;" >' + text + '</pre>');
    });
}

and in traces.ejs ( https://github.com/rabbitmq/rabbitmq-server/blob/main/deps/rabbitmq_tracing/priv/www/js/tmpl/traces.ejs#L94 )

 <td><a onclick=loadTextFile(<%= node.name %>, <%= file.name %>) ><%= file.name %></a></td>

Describe alternatives you've considered

No response

Additional context

No response