fix: theme toggle double-click bug - remove duplicate listener

static/js/app.js

@@ -10,15 +10,7 @@
     PageSettings.init();
     Router.init();
 
-    document.getElementById('theme-toggle').addEventListener('click', () => {
-        Theme.toggle();
-    });
-
-    const savedTheme = localStorage.getItem('turbosu-theme');
-    if (savedTheme && savedTheme !== Theme.current) {
-        Theme._current = savedTheme;
-        Theme.apply();
-    }
+    document.getElementById('theme-toggle').addEventListener('click', () => Theme.toggle());
 
     console.log('%cTurboSu %cReady',
         'color:#667eea;font-size:16px;font-weight:bold;',

static/js/components/topbar.js

@@ -4,10 +4,6 @@ const Topbar = {
     init() {
         this._statusEl = document.getElementById('connection-status');
 
-        document.getElementById('theme-toggle').addEventListener('click', () => {
-            Theme.toggle();
-        });
-
         WS.on('status', (status) => {
             this._statusEl.className = `status-indicator ${status}`;
             this._statusEl.querySelector('.status-text').textContent =