- Widen priority badge from w-10 to w-14 to fit "medium" text, add "none" case - Guard against null end_datetime in event update validation - Exclude current event from this_and_future DELETE to prevent 404 - Use Python-side datetime.now for comment timestamps (avoids UTC offset) - Hide "Add subtask" button when viewing a subtask (prevents nested nesting) - Add X close button to TaskDetailPanel header on desktop Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>