Sprint 5: hierarchical GroupNode with layout engine

Sprint 4: badge_with_text deterministic template

Sprint 3: text3d node type via TextGeometry + FontLoader

Sprint 2: material presets via MeshPhysicalMaterial

Sprint 1: ExtrudeNode type — star, heart, hexagon, badge, shield

Four targeted fixes: color pass-through, re-render on style/motion, auto-reroll, nested-spheres template

Add 5 new shapes: capsule, ring, circle, tube, roundedBox (+ FEWSHOT examples)

Add relational layout (stack/row/grid) + burger/snowman/tree templates to DSL

Block 0+2+3: 3B model, curated examples, glow 1.0, auto-frame camera, brighter lights

Fix thread safety, logging, input validation, pin deps for HF Spaces T4