fix: add loading indicators to all pages

- 'Loading…' shown in charts/fields/output areas while waiting for server response
- Console + chat: clears loading state on first output line
- Player list: table body shows loading row until refresh completes
- Player info / Server info: fields show loading until data arrives

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

js/pages/console.js

@@ -4,7 +4,7 @@
 function ConsolePage(params, container) {
   var html =
     '<div id="ConsoleController">' +
-      '<div id="console-output" style="height:600px" class="Output scrollable"></div>' +
+      '<div id="console-output" style="height:600px" class="Output scrollable text-white-50">Loading…</div>' +
       '<form id="console-form">' +
         '<input type="text" id="console-input" class="form-control" autocomplete="off">' +
       '</form>' +
@@ -15,8 +15,10 @@ function ConsolePage(params, container) {
   var inputEl = document.getElementById('console-input');
   var commandHistory = [];
   var historyIndex = 0;
+  var firstOutput = true;
 
   function addOutput(msg) {
+    if (firstOutput) { outputEl.innerHTML = ''; outputEl.classList.remove('text-white-50'); firstOutput = false; }
     var div = document.createElement('div');
     div.className = msg.Type;
     div.textContent = stripHtml(msg.Message);