fix(tests): grep -c count duplication on zero matches #5

	name: CI

	on:
	push:
	branches: [main, develop]
	pull_request:
	branches: [main]

	jobs:
	shellcheck:
	name: Shellcheck
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Install shellcheck
	run: sudo apt-get install -y shellcheck
	- name: Run shellcheck
	run: \|
	shellcheck -S warning config.sh coordinator.sh worker.sh summary.sh summary-morning.sh lesson-generator.sh install.sh

	test:
	name: Tests
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Make scripts executable
	run: chmod +x .sh tests/.sh
	- name: Run tests
	run: ./tests/test-nightshift.sh

	language-check:
	name: English Only
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Check for non-English strings
	run: \|
	GERMAN=$(grep -rlP '\xc3[\xa4\xb6\xbc\x9f]' --include='*.sh' --exclude-dir=tests . \|\| true)
	if [[ -n "$GERMAN" ]]; then
	echo "Files with German characters:"
	echo "$GERMAN"
	grep -rnP '\xc3[\xa4\xb6\xbc\x9f]' --include='*.sh' --exclude-dir=tests .
	exit 1
	fi
	echo "All clear — no German strings found."

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