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/router.js

@@ -18,8 +18,8 @@ var Router = (function () {
   var viewSelector = null;
   var currentCleanup = null;
 
-  function add(pattern, title, template, onEnter) {
-    routes.push({ pattern: pattern, title: title, template: template, onEnter: onEnter });
+  function add(pattern, title, onEnter) {
+    routes.push({ pattern: pattern, title: title, onEnter: onEnter });
   }
 
   function navigate(hash) {