- New shape types: label (text), arrow (flow), temp_probe, output_indicator
- Right-click context menu: change shape, animation, color, link to HMI control
- Toolbar: add rect/circle/label/arrow/temp probe/output, delete selected
- IN/OUT now draggable label elements
- Temp probes with pulse animation and color coding
- Arrows with adjustable length and rotation
- Custom colors on any element (fill + stroke)
- All positions/sizes/rotations saved to layout JSON
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>