chore: tidy up demo pages #16868

	name: E2E
	on:
	workflow_dispatch:
	pull_request:
	branches: [main, rc, dev]
	jobs:
	e2e:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Check diff for testable changes
	id: diff-check
	run: \|
	testable_changes="$(
	git diff --name-only HEAD "$(
	git merge-base HEAD origin/${{ github.base_ref }}
	)" -- . ':!.md' ':!/calcite-ui-icons/'
	)"

	echo "changed files: $testable_changes"
	# skip if there are only md changes
	if [ -z "$testable_changes" ]; then
	echo "SKIP=true" >> "$GITHUB_OUTPUT"
	else
	echo "SKIP=false" >> "$GITHUB_OUTPUT"
	fi
	- if: steps.diff-check.outputs.SKIP == 'false'
	uses: actions/setup-node@v4
	with:
	node-version-file: package.json
	- if: steps.diff-check.outputs.SKIP == 'false'
	name: Run tests for testable changes
	run: npm install && npm run build && npm run test
	- if: steps.diff-check.outputs.SKIP == 'true'
	name: Skip visual snapshots for non-testable changes
	env:
	GH_TOKEN: ${{ secrets.ADMIN_TOKEN }}
	PR_NUMBER: ${{ github.event.pull_request.number }}
	run: \|
	gh pr edit "$PR_NUMBER" --add-label "skip visual snapshots"

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