Update README calendar (KST daily) #2

	name: Update README calendar (KST daily)

	on:
	schedule:
	# KST 00:02 = UTC 15:02 (전날)
	- cron: '2 15 * * *'
	workflow_dispatch: {}

	permissions:
	contents: write

	jobs:
	update_calendar:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # 달력 집계용으로 이전 커밋까지 모두 필요

	- name: Set timezone to Asia/Seoul
	run: \|
	sudo timedatectl set-timezone Asia/Seoul
	date

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'

	- name: Generate calendar into README
	run: \|
	python3 scripts/update_readme_calendar.py

	- name: Commit & push if changed
	run: \|
	if git diff --quiet README.md; then
	echo "No changes in README.md"
	exit 0
	fi
	git config user.name "github-actions[bot]"
	git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
	git add README.md
	KST_NOW=$(date +'%Y-%m-%d %H:%M')
	git commit -m "README 달력 자동 업데이트: ${KST_NOW} KST"
	git push

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