Reflect the current runtime in docs/technical/hand-tracking.md:
- SVG visualizer is now the primary hand UI; the 3D glove is opt-in
via the Show Model debug toggle.
- Reorder the runtime flow to put HandTrackingVisualizer before
HandTrackingGlove and make explicit that grab, fist detection, SVG
and optional 3D glove are independent consumers of the same
landmark snapshot.
- New Fist Detection section showing how isFist() in
browserHandTracking.ts derives the flag from landmarks alone (palm
centroid + 4 fingertip distances), and confirming GrabbableObject
reads that flag directly - no glove involvement.
- Describe the SVG visualizer styling and the feMorphology outline
trick.
- Mark HandTrackingFallback and the gant_l/_pad assets as legacy in
the limitations list.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Tom Boullay
bbae199105