# SHiRE Academy Stage 3B.2 — Interactive 3D Draft Viewer

Adds a fully local, dependency-free WebGL STL viewer to the existing Stage 3B Fast Object Builder.

## What changes

- Adds **VIEW 3D MODEL** beside completed Fast Builder jobs.
- Loads the exact `object_draft.stl` from the job's existing allowlisted Academy artifact endpoint.
- Supports rotate, zoom, pan, fit, front/side/top views, grid, wireframe and auto-rotate.
- Displays STL dimensions, triangle count and file size.
- Works through the existing localhost/Tailscale SSH tunnel and does not expose a new port.

## Safety boundaries preserved

- The 371-skill Academy state remains read-only.
- No counted attempt, certification or Forge permission changes.
- No production approval.
- No new server write path, external script, CDN, npm runtime or public network dependency.
- The viewer accepts only the existing allowlisted Fast Builder `object_draft.stl` path.

Target version: `0.8.1-stage3b.2-interactive-3d-viewer`.