refinement of upcoming tracks

conductor/tracks/track_progress_viz_20260306/spec.md

@@ -1,21 +1,34 @@
 # Track Specification: Track Progress Visualization (track_progress_viz_20260306)
 
 ## Overview
-Progress bars and percentage completion for active tracks and tickets. Better visualization of DAG execution state.
+Progress bars and percentage completion for active tracks and tickets.
 
-## Architectural Constraints
-- **Accurate State**: Progress MUST reflect actual ticket status.
-- **Efficient Updates**: Status changes MUST trigger efficient UI updates.
+## Current State Audit
+
+### Already Implemented
+- **`models.Track`**: Has tickets list
+- **`project_manager.get_all_tracks()`**: Returns track progress
+- **GUI**: Shows ticket status but no progress bar
+
+### Gaps to Fill
+- No visual progress bar
+- No percentage completion display
+- No ETA estimation
 
 ## Functional Requirements
-- **Progress Bar**: Visual bar showing % complete.
-- **Percentage Text**: Display numeric % completion.
-- **Ticket Breakdown**: Show completed/remaining counts.
-- **ETA Estimate**: Calculate approximate completion time.
+- Progress bar showing % complete
+- Ticket count: X/Y completed
+- ETA estimation based on average time per ticket
+
+## Key Integration Points
+| File | Purpose |
+|-----|---------|
+| `src/gui_2.py` | Progress bar rendering |
+| `src/dag_engine.py` | Completion calculation |
 
 ## Acceptance Criteria
-- [ ] Progress bar renders.
-- [ ] Percentage accurate.
-- [ ] Counts match actual tickets.
-- [ ] ETA calculation works.
-- [ ] Updates reflect state changes.
+- [ ] Progress bar renders
+- [ ] Percentage accurate
+- [ ] Counts match actual tickets
+- [ ] ETA calculation works
+- [ ] 1-space indentation