diff --git a/dashboard/js/sidebar-timeline.js b/dashboard/js/sidebar-timeline.js
index 60862b0..73fdea9 100644
--- a/dashboard/js/sidebar-timeline.js
+++ b/dashboard/js/sidebar-timeline.js
@@ -150,7 +150,6 @@
         total: 0,
         loading: false,
         panelVisible: false,
-        dashboardMode: 'expert',
         selectedEventId: null,   // ID of the currently selected (jumped-to) event
         // Virtualization state
         virtualization: {
@@ -227,14 +226,6 @@
     // ============================================
 
     function onRouterModeChange(newMode, oldMode) {
-        // Expert modes support time-travel replay
-        var expertModes = ['live', 'timeline', 'replay', 'simulate'];
-        if (expertModes.indexOf(newMode) === -1) {
-            state.dashboardMode = 'simple';
-        } else {
-            state.dashboardMode = 'expert';
-        }
-
         // Reload events if panel is visible
         if (state.panelVisible) {
             loadInitialEvents();
@@ -278,7 +269,6 @@
     function loadInitialEvents() {
         const params = new URLSearchParams();
         params.set('limit', CONFIG.initialLoadLimit);
-        params.set('mode', state.dashboardMode);
 
         fetch('/api/events?' + params.toString())
             .then(function(res) {
@@ -703,8 +693,8 @@
             eventEl.classList.add('selected');
         }
 
-        // In expert mode, use jump-to-time replay
-        if (state.dashboardMode === 'expert' && window.SpaxelReplay) {
+        // Jump-to-time replay
+        if (window.SpaxelReplay) {
             SpaxelReplay.jumpToTime(timestamp).then(function() {
                 updateNowReplayingChip(true, timestamp);
 
@@ -719,7 +709,6 @@
                 }
             });
         } else if (window.SpaxelRouter) {
-            // In simple mode, navigate to timeline view instead of replay
             SpaxelRouter.navigate('timeline');
         }
     }
diff --git a/dashboard/js/sidebar-timeline.test.js b/dashboard/js/sidebar-timeline.test.js
index 282aeff..3b98f08 100644
--- a/dashboard/js/sidebar-timeline.test.js
+++ b/dashboard/js/sidebar-timeline.test.js
@@ -1176,25 +1176,21 @@ describe('SidebarTimeline', function() {
             });
         });
 
-        test('non-replay mode navigates to timeline view instead of replay', function() {
+        test('without SpaxelReplay navigates to timeline view', function() {
+            // Remove SpaxelReplay to simulate it not being available
+            delete window.SpaxelReplay;
+
             // Show panel and load events
             SidebarTimeline.show();
             SidebarTimeline.refresh();
 
             return new Promise(function(resolve) {
                 setTimeout(function() {
-                    // Trigger ambient mode via the router callback that sidebar-timeline registered during init
-                    var routerCalls = global.SpaxelRouter.onModeChange.mock.calls;
-                    expect(routerCalls.length).toBeGreaterThan(0);
-                    var routerCallback = routerCalls[0][0];
-                    expect(typeof routerCallback).toBe('function');
-                    routerCallback('ambient');
-
                     var eventEl = mockElements.eventsContainer.querySelector('[data-id="100"]');
                     expect(eventEl).toBeTruthy();
                     eventEl.click();
 
-                    // In ambient mode, should navigate via router, not call jumpToTime
+                    // Without SpaxelReplay, should navigate via router
                     expect(global.SpaxelRouter.navigate).toHaveBeenCalledWith('timeline');
                     resolve();
                 }, 150);