First-pass Greek redesign built as a preview: new Editor/PloutonionGreek.cs (Doric door in a rock-cut bay, bronze krater with hands, meander floor band, Lethe cisterns, cypress, stele ELPENOR, tomb doors, torches), wired into PloutonionBuilder (Meshy ring, rune ring and rift quads switched off). Scene SCN_Ploutonion_Mouth rebuilt. NOT committed, tests not run, tomb doors not yet seen in a render. Screenshots: Area TODO\screenshots\boss-arena-preview-*.png