Update Trend Chart #2

	name: CI

	on:
	push:
	branches: ['**']
	pull_request:

	concurrency:
	group: ci-${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	test:
	name: Jest + build (Node ${{ matrix.node }})
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	# package.json engines is ">=20 <24"; cover both active LTS
	# lines so a bump in either doesn't silently break CI.
	node: ['20', '22']

	env:
	CI: 'true'
	# react-scripts build wraps any warning as an error under CI=true
	# on its own, but some consumers of this action read DISABLE_ESLINT_PLUGIN.
	# We intentionally keep lint errors failing the build.

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Set up Node ${{ matrix.node }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node }}
	cache: npm

	- name: Install
	# `npm ci` is strict about package-lock.json: it fails if the
	# lock and package.json drift, and never mutates node_modules.
	# Exactly what CI wants.
	run: npm ci

	- name: Run tests
	# test:ci in package.json already forces --watchAll=false
	# and caps workers; don't reinvent that flag set here.
	run: npm run test:ci

	- name: Production build
	# Smoke-test that the bundle still compiles on this Node
	# version — covers things that unit tests won't catch
	# (e.g. ESM/CJS interop regressions in new deps).
	run: npm run build

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