Replaces the placeholder fbox figure with the rendered PNG from
experiments/counterexample_conj_5_5.py (40-vertex cubic plane graph,
proper 3-edge-coloured, both K_{red,blue} 8-cycle and K_{red,green}
12-cycle constant h_φ = -1, sharing the colour-red edge (0, 7)).
Disproof remark also updated to give the actual structural details
(40 vertices, the +1/-1 split 16/24, location of the +1-region in
the inner ladder) instead of a placeholder description.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
didericis
cc81b804db