Box beacons become relay masts; a floating-base cause is fixed

Glowing box beacons in Shattered Rift are now segmented relay masts with small warm locator heads. We also fixed one cause of floating bases: terrain height disagreed with the drawn triangles. On one city route, 39 of 43 old beacon centres floated over a metre; the corrected anchors showed no floating feet across 215 checked rays. The first images use the player camera; a diagnostic view shows a snapped flagship wreck instead of two boxes. Foundations embed on slopes by design. Full-world grounding, most city buildings, full AAA quality and sustained 60 FPS remain open.