fix(demos): sync Manim 13–14 to short TTS; compose uses -shortest #12

	name: Deploy to GitHub Pages

	on:
	push:
	branches:
	- main
	paths:
	- 'docs/**'
	- '.github/workflows/pages.yml'
	workflow_dispatch:

	permissions:
	contents: read
	pages: write
	id-token: write

	concurrency:
	group: "pages"
	cancel-in-progress: false

	jobs:
	deploy:
	# Required for deploy-pages; shows deployment URL on the environment
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	env:
	FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	lfs: true
	# Same MP4 paths are reused on every deploy; browsers + CDN cache them hard.
	# Bump the query string on each deploy so viewers get the bytes that match main.
	- name: Cache-bust video URLs in index.html
	env:
	GITHUB_SHA: ${{ github.sha }}
	run: \|
	python3 <<'PY'
	import os, pathlib, re
	sha = os.environ["GITHUB_SHA"][:12]
	path = pathlib.Path("docs/index.html")
	text = path.read_text(encoding="utf-8")

	def repl(m: re.Match) -> str:
	base = m.group(1)
	return f'src="{base}?v={sha}"'

	new = re.sub(
	r'src="(demos/recordings/[^"?]+\.mp4)(?:\?[^"]*)?"',
	repl,
	text,
	)
	path.write_text(new, encoding="utf-8")
	PY
	- name: Setup Pages
	uses: actions/configure-pages@v4
	- name: Upload artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: docs
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4

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