Dark Mode folgt Browser-Einstellung (prefers-color-scheme), Toggle entfernt

Co-Authored-By: Claude <noreply@anthropic.com>

views/chat.ejs

@@ -115,26 +115,6 @@
     <input type="hidden" id="activeThread" value="<%= activeId || '' %>">
 
     <script>
-        // Minimal dark-mode toggle: main.js is not loaded on the chat page, so
-        // wire the header's toggle + sync the sun/moon icon visibility here.
-        (function () {
-            var sun = document.getElementById('sunIcon');
-            var moon = document.getElementById('moonIcon');
-            var isDark = document.documentElement.classList.contains('dark');
-            function sync() {
-                sun && sun.classList.toggle('hidden', isDark);
-                moon && moon.classList.toggle('hidden', !isDark);
-            }
-            sync();
-            var btn = document.getElementById('darkModeToggle');
-            if (btn) btn.addEventListener('click', function () {
-                isDark = !document.documentElement.classList.toggle('dark');
-                // toggle returns whether class is present AFTER toggle; recompute.
-                isDark = document.documentElement.classList.contains('dark');
-                localStorage.setItem('darkMode', isDark ? 'enabled' : 'disabled');
-                sync();
-            });
-        })();
         window.__CHAT_BOOT__ = {
             activeId: <%= activeId ? JSON.stringify(activeId) : 'null' %>,
             needsThread: <%= activeId ? 'false' : 'true' %>