- TaskForm: add start_time/end_time fields; on save emits optional
block payload so PlannerView creates a PlannedBlock automatically
- PlannerView: handleSave accepts block param, calls createBlock after
task creation when time is provided
- CalendarBlock: planned blocks with task_id get draggable="true" +
@dragstart emitting blockDragStart event
- CalendarGrid: forward blockDragStart to useCalendarDnD
- useCalendarDnD: onBlockDragStart stores block_id + duration in
dataTransfer; onDrop handles both move-existing-block and
create-new-block paths
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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