chore(task-board): disable feature during refactor

public/app.js

@@ -305,6 +305,7 @@
   let usageDashboardRequestSeq = 0;
   const taskBoardViewState = {
     open: false,
+    enabled: false,
     savedFocus: null,
   };
   let taskBoardController = null;
@@ -4587,6 +4588,16 @@
     }
   }
 
+  function setTaskBoardFeatureEnabled(enabled) {
+    taskBoardViewState.enabled = enabled === true;
+    if (taskBoardOpen) taskBoardOpen.hidden = !taskBoardViewState.enabled;
+    if (taskTrackingControl) taskTrackingControl.hidden = true;
+    if (!taskBoardViewState.enabled) {
+      if (taskBoardViewState.open) closeTaskBoard({ restoreFocus: false });
+      taskTrackingController?.setState({ sessionId: '', disabled: true });
+    }
+  }
+
   function setUsageDashboardState(state, message = '') {
     const loading = state === 'loading';
     usageDashboardState.loading = loading;
@@ -5417,7 +5428,7 @@
   }
 
   function openTaskBoard() {
-    if (!taskBoardPanel || !taskBoardRoot || !window.CcwebTaskBoard) return;
+    if (!taskBoardViewState.enabled || !taskBoardPanel || !taskBoardRoot || !window.CcwebTaskBoard) return;
     if (usageDashboardState.open) closeUsageDashboard({ restoreFocus: false });
     if (advancedSessionSearchState.open) closeAdvancedSessionSearch({ restoreFocus: false });
     taskBoardViewState.savedFocus = document.activeElement instanceof HTMLElement ? document.activeElement : null;
@@ -5444,6 +5455,11 @@
 
   function syncTaskTrackingControl(snapshot = null) {
     if (!taskTrackingControl || !window.CcwebTaskBoard) return;
+    if (!taskBoardViewState.enabled) {
+      taskTrackingControl.hidden = true;
+      taskTrackingController?.setState({ sessionId: '', disabled: true });
+      return;
+    }
     const sessionId = snapshot?.sessionId || currentSessionId || '';
     const tracking = snapshot?.taskTracking || {};
     if (!sessionId) {
@@ -6969,6 +6985,7 @@
           loginOverlay.hidden = true;
           app.hidden = false;
           setUsageDashboardFeatureEnabled(msg.features?.usageStatistics === true);
+          setTaskBoardFeatureEnabled(msg.features?.taskBoard === true);
           const flushedSessionSwitch = flushPendingSessionSwitch();
           const flushedSessionResume = flushedSessionSwitch ? false : flushPendingSessionResume();
           if (!flushedSessionSwitch &&
@@ -6996,6 +7013,7 @@
           authToken = null;
           wsAuthenticated = false;
           setUsageDashboardFeatureEnabled(false);
+          setTaskBoardFeatureEnabled(false);
           localStorage.removeItem('cc-web-token');
           document.dispatchEvent(new CustomEvent('cc-web-auth-failed'));
           loginOverlay.hidden = false;
@@ -11515,6 +11533,8 @@
     setUsageDashboardFeatureEnabled(false);
   }
 
+  setTaskBoardFeatureEnabled(false);
+
   if (taskBoardOpen && taskBoardPanel && taskBoardRoot) {
     taskBoardOpen.addEventListener('click', openTaskBoard);
     taskBoardClose?.addEventListener('click', () => closeTaskBoard());