Add a measure/ruler tool (#15) #23

	name: Deploy to GitHub Pages

	# Builds the static site and publishes it to GitHub Pages on every push to
	# main. The RF engine ships as committed WebAssembly (src/engine/generated/),
	# so this needs no Emscripten — just a frontend build. Correctness (engine
	# rebuild diff, type check, golden tests) is gated separately by ci.yml.
	#
	# One-time setup in the repo: Settings → Pages → Source = "GitHub Actions".

	on:
	push:
	branches: [main]
	workflow_dispatch:

	# Allow the deploy job to publish to Pages; one in-flight deploy at a time.
	permissions:
	contents: read
	pages: write
	id-token: write

	concurrency:
	group: pages
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v6

	- uses: pnpm/action-setup@v6
	with:
	version: 9

	- uses: actions/setup-node@v6
	with:
	node-version: 24
	cache: pnpm

	- name: Install dependencies
	run: pnpm install --frozen-lockfile

	- name: Build site
	run: pnpm build
	env:
	# Optional: add a STADIA_API_KEY repo secret (Settings → Secrets and
	# variables → Actions) to enable the Stadia "Terrain" basemap in
	# production. Without it, the no-key "Topographic" terrain still works.
	VITE_STADIA_API_KEY: ${{ secrets.STADIA_API_KEY }}

	- uses: actions/upload-pages-artifact@v5
	with:
	path: dist

	deploy:
	needs: build
	runs-on: ubuntu-latest
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	steps:
	- id: deployment
	uses: actions/deploy-pages@v5

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