Tree View:
- Fix nested task indentation to scale properly with depth (1.5rem per level)
- Sub-subtasks now indent correctly relative to their parents
Kanban View:
- Show ALL tasks as draggable cards (not just root tasks)
- Subtasks display parent task name for context
- Each subtask can be independently dragged to different status columns
- Remove nested subtask expansion since all tasks are now individual cards
f3fc87e715