fix(time): make offset-based rules timezone-independent

Author: Codie-Shannon

src/LifeOS.Core/ScheduledCommunications/ScheduledCommunicationService.cs

@@ -140,7 +140,9 @@ public bool CanSend(
                communication.State == ScheduledCommunicationState.Approved &&
                communication.ApprovedAt is not null &&
                communication.ScheduledFor <= now &&
-               !quietHours.Contains(TimeOnly.FromDateTime(now.LocalDateTime));
+               // Quiet hours apply to the wall-clock time carried by the caller's
+               // explicit offset, not to the timezone configured on this machine.
+               !quietHours.Contains(TimeOnly.FromDateTime(now.DateTime));
     }
 
     public ScheduledCommunication MarkSent(

src/LifeOS.Core/WorkTime/WorkTimeService.cs

@@ -203,7 +203,10 @@ public WorkDaySummary Summarize(
         DateTimeOffset now)
     {
         WorkTimeEntry[] selected = entries
-            .Where(entry => DateOnly.FromDateTime(entry.StartedAt.LocalDateTime) == date)
+            // StartedAt.DateTime preserves the wall-clock date represented by the
+            // entry's own offset. LocalDateTime would instead convert through the
+            // machine timezone, making summaries differ between NZ and UTC runners.
+            .Where(entry => DateOnly.FromDateTime(entry.StartedAt.DateTime) == date)
             .ToArray();
 
         TimeSpan total = TimeSpan.FromTicks(selected.Sum(entry => entry.Duration(now).Ticks));