fix: iOS scroll blocked by enforcement interval + missing touch-action on slots

Three root causes fixed:

1. Scroll enforcement interval (every 50ms for 2s) was the main blocker:
   The setInterval forced gridRef.scrollTop on every frame, making iOS think
   the page was always scrolling programmatically. User touches during those
   2 seconds were overridden. The header appeared 'stuck' because the view
   was frozen. Replaced with a single setTimeout scroll (300ms on first load,
   50ms on subsequent). Added history.scrollRestoration='manual' so Safari
   doesn't fight us with scroll position restoration.

2. touch-action: pan-y was only on .time-grid-wrapper — NOT inherited by CSS.
   Slot child elements had touch-action: auto (default), so iOS still waited
   for JS before committing scroll on day column touches. Added touch-action:
   pan-y directly to .time-slots-container (the actual touched element area).
   Time column labels have no JS handlers so iOS scrolled them freely — this
   explains why time column worked but day columns didn't.

3. align-items: start on .weekly-days-grid was wrong (added in last commit).
   Removed — CSS grid default stretch is correct.

v1.77.4

package.json

@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.77.3",
+  "version": "1.77.4",
   "description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
   "main": "index.js",
   "scripts": {

src/app/globals.css

@@ -3167,8 +3167,6 @@ h3 {
 .time-grid-wrapper .weekly-days-grid {
   flex: 1;
   overflow: visible;
-  /* Align grid items to the top so sticky headers work correctly */
-  align-items: start;
 }
 
 .time-grid-wrapper .weekly-day-column {
@@ -3190,6 +3188,9 @@ h3 {
 .time-grid-wrapper .time-slots-container {
   overflow: visible;
   flex: 1;
+  /* touch-action is NOT inherited — must be set on the actual touched element.
+     pan-y tells iOS: vertical swipe = scroll immediately, don't wait for JS handlers */
+  touch-action: pan-y;
 }
 
 /* All-Day Events Section */

src/components/WeeklyView.tsx

@@ -3110,34 +3110,28 @@ export default function WeeklyView() {
         }
     }, [currentWeekStart, session, fetchCalendarEvents]);
 
+    // Disable browser scroll restoration so Safari doesn't fight our initial scroll position
+    useEffect(() => {
+        if (typeof window !== 'undefined' && window.history.scrollRestoration) {
+            window.history.scrollRestoration = 'manual';
+        }
+    }, []);
+
     // Scroll to preferred start hour (initial load + when user changes startHour)
     useEffect(() => {
         if (!isLoading) {
-            const performScroll = () => {
+            const slotsPerHour = 60 / cellDuration;
-                const slotsPerHour = 60 / cellDuration;
+            const slotHeight = getSlotHeight(cellDuration);
-                const slotHeight = getSlotHeight(cellDuration);
+            const scrollOffset = workingHoursStart * slotsPerHour * slotHeight;
-                const scrollOffset = workingHoursStart * slotsPerHour * slotHeight;
 
-                // Single scroll container: gridRef points to time-grid-wrapper
+            // Single scroll — no interval, no enforcement loop.
+            // We set scrollRestoration='manual' so the browser won't override this.
+            const delay = isInitialScrollDone.current ? 50 : 300;
+            const timer = setTimeout(() => {
                 if (gridRef.current) gridRef.current.scrollTop = scrollOffset;
-
                 intendedScrollTop.current = scrollOffset;
-
+                isInitialScrollDone.current = true;
-                // On initial load, re-enforce for 2s to fight browser auto-scroll restoration
+            }, delay);
-                if (!isInitialScrollDone.current) {
-                    const interval = setInterval(() => {
-                        if (gridRef.current) gridRef.current.scrollTop = scrollOffset;
-                    }, 50);
-
-                    setTimeout(() => {
-                        clearInterval(interval);
-                        isInitialScrollDone.current = true;
-                    }, 2000);
-                }
-            };
-
-            // Delay slightly to ensure layout is stable
-            const timer = setTimeout(performScroll, isInitialScrollDone.current ? 50 : 500);
             return () => clearTimeout(timer);
         }
     }, [isLoading, workingHoursStart, cellDuration]);