fix: close rollover planner before Today handoff (Closes #1268)

frontend/dashboard.js

@@ -2219,6 +2219,7 @@
 
   function performTodayTransition(action, item = null) {
     qs('#today-readiness-sheet').hidden = true;
+    qs('#plan-today-sheet').hidden = true;
     document.body.classList.remove('task-overlay-open');
     if (taskOverlayHistory.current?.() === 'today-readiness') taskOverlayHistory.close();
     const transitioned = ({