fix: router add() signature, setActivePage typo, connect race condition

- Router.add() now takes 3 params (pattern, title, onEnter) matching app.js usage
- Fixed setActiveSidebar → setActivePage in all route callbacks
- Removed premature hash-setting from connect.js — app.js now sole navigator
  (was firing router into a hidden container before showConnected ran)

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

js/pages/connect.js

@@ -110,7 +110,7 @@ function ConnectPage(params, container) {
   });
 
   function onConnected() {
-    window.location.hash = '#/' + Rcon.getAddress() + '/info';
+    // Navigation handled by app.js — don't set hash here
   }
   function onDisconnected(ev) {
     showError('Connection was closed — Error ' + (ev ? ev.code : 'unknown'));