feat: add task dependencies and auto-chaining support#363
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Add support for task dependencies where one task can block another: - Database: Add task_dependencies table with blocker_id, blocked_id, auto_queue flag, and cycle detection - Logic: ProcessCompletedBlocker() checks and unblocks dependent tasks when a blocker completes. Auto-queue moves unblocked tasks to queued status if configured - CLI: Add commands ty block, ty unblock, ty deps for managing dependencies from command line - UI: Show lock icon with blocker count on kanban cards, display dependency info in task detail view This enables complex workflows where agents can work on subsequent tasks automatically once prerequisites are met. Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Implemented by Task #941