Make T_coat notation consistent#304

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portsmouth wants to merge 2 commits intoAcademySoftwareFoundation:dev_1.2from

portsmouth:fix-Tcoat-notation

Commits on Apr 17, 2026

Use bold \mathbf{T}_coat notation consistently throughout as RGB quantity

portsmouth
and
claude
committed
Restore accidentally deleted images/dielectric_fresnel.svg

portsmouth
and
claude
committed

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