[QA] Verification Complete - PASSED. All 37 state tests passing, 485 total project tests passing, 95% coverage. Implementation exceeds requirements with reactive callbacks and comprehensive helper methods. Status updated to done.

## Implementation Complete Created `WorkflowState` dataclass in `src/trckr_plow/state.py` with comprehensive state tracking for TUI visualization: ### Files Created - `src/trckr_plow/state.py` - Main state module with dataclasses - `tests/test_state.py` - Unit tests (37 tests total) ### Components 1. **IssueInfo** - Tracks issue id, title, status, labels 2. **WorkflowProgress** - Tracks current_step, completed_steps, total_steps 3. **DecisionTracking** - Tracks classification, qa_type, worktree_path 4. **TimingInfo** - Tracks step/round/workflow timestamps 5. **QueueStatus** - Tracks triage/todo/in_progress/in_review/done/blocked counts 6. **WorkflowState** - Main container with helper methods ### Features - All fields have sensible defaults - State change callbacks via `set_on_change()` for reactive TUI updates - JSON serialization (`to_json()`, `from_json()`) for logging - Helper methods: `start_workflow()`, `start_step()`, `complete_step()`, `update_issue()`, etc. - `reset_for_new_issue()` preserves workflow-level state while clearing issue-specific state ### Verification - All 485 tests pass - Linting passes (ruff) - 95% code coverage on state.py