Implement UI build pipeline #584

	name: Development

	on:
	pull_request_target:
	types: [opened, synchronize, reopened]

	jobs:
	test-precommit-checks:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python: ["3.9"]
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}
	- name: Install dependencies
	run: pip install pre-commit
	- name: Dump .env.local tail (hex + ASCII)
	run: \|
	echo '--- od -c tail ---'
	od -c -A n -v src/ui/.env.local \| tail -n 3
	echo '--- od -tx1 last two bytes ---'
	od -tx1 -A n -v -j $(($(stat -c%s src/ui/.env.local)-2)) -N2 src/ui/.env.local
	echo '--- git eol info ---'
	git ls-files --eol -- src/ui/.env.local
	echo '--- git attributes ---'
	git check-attr -a -- src/ui/.env.local
	- name: Run end-of-file-fixer only, verbose
	run: \|
	pre-commit run end-of-file-fixer --files src/ui/.env.local --verbose --color always \|\| true
	echo "--- exit code: $?" # we expect 1 if it rewrote

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