[BUG] Rigged character ground contact hides legs in Vice Isle

[Noisemaker111]

Vice Isle on main 0b89a34 shows the player's lower body intersecting the ground at spawn and during walking.

• Diagnose posed model bounds, collider and terrain height agreement in shared owners.
• Fix the shared contract without a game-local vertical offset.
• Cover translated/scaled rigs and spawn, walk, jump/land and restore with focused tests and inspected capture evidence.

[Noisemaker111]

Working on this in agent/ground-contact (isolated worktree). Owning shell SceneModels.tsx, measureBounds.tsx and focused tests; terrain scope only if diagnosis proves it.

[Noisemaker111]

Diagnosis narrows the report: current-main posed sole y=1.1992 versus groundHeightAt=1.2; generated terrain raycast y=1.2000000477 at spawn, both feet and walk endpoint. The rear cape reaches y=1.2493 and obscures most of the short legs, so the rear screenshot does not prove half-body sinking. No vertical-offset patch is justified by these measurements.
Scaled/translated real Rogue rig (normalized bind height 1.8), 31 samples/clip: Idle sole 1.19920–1.19931; Walking_A 1.17848–1.20149; Jump_Start 1.19932–1.22816; Jump_Idle 1.14268–1.22816; Jump_Land 1.19898–1.22816. Jump samples are animation-only, not gameplay landing proof.
Focused bounds/model tests PASS 29; shell check-types PASS. Two temporary terrain-ray diagnostics hit Line2 camera errors; diagnostics removed, capture retries stopped and daemon stopped. No source diff or PR. Frontal visual confirmation, collider parity and actual jump/land/save-restore remain unverified; leaving this issue open rather than claiming a fix.