- Debug image shows only court quadrilateral + camera XYZ coords
- Remove all Hough line debug visualization noise
- Simplify _detect_court_corners — returns corners + error only
- Display camera positions in calibration card (CAM0/CAM1 X Y Z)
- Clean up auto_calibrate flow
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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