Implement AXIS parity UI and execution baseline

web/react/README.md

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+# React Frontend
+
+This is the route-aligned frontend entrypoint for FE-M1/FE-08:
+
+- React 19 + TypeScript 7 + Vite 8
+- Tailwind CSS 4
+- Radix UI Tabs, ToggleGroup and Tooltip
+- Three.js 0.185.1, consuming Worker snapshot pose/joints/toolpath
+- Dedicated Worker entry with the existing WASM `SimSession`
+- LinuxCNC `configs/sim` exact-path assets served by the Vite asset plugin
+
+Run with the domestic npm registry when the local cache is empty:
+
+```bash
+npm install --registry=https://registry.npmmirror.com
+npm run typecheck
+npm run build
+npm run preview -- --port 5174
+```
+
+React does not access OPFS or WASM directly. It sends versioned commands through
+`ReactWorkerClient`; the Worker owns the simulation state, workspace and OPFS
+boundary.