leonarski_fandClaude Opus 4.8
1aac0495e1
`span = hi - lo || 1` only replaced an exactly-zero span, so Min>Max (or a
cleared Min/Max field coercing to 0 via Number("")) gave a negative span
and rendered the pedestal image with an inverted/collapsed colour scale.
Use `hi - lo > 0 ? hi - lo : 1` so a non-positive span falls back to 1.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>