fix: 使用 cat heredoc 方法修复企业微信通知环境变量展开

- 使用 cat > file <<EOF 替代其他方法
- 确保环境变量在 heredoc 中正确展开
- 本地测试验证成功

scripts/test-printf.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+export CI_COMMIT_BRANCH="test-branch"
+export CI_COMMIT_SHA="abc123def456"
+export CI_COMMIT_MESSAGE="测试企业微信通知功能"
+export CI_COMMIT_AUTHOR="张翔"
+export CI_PIPELINE_NUMBER="999"
+export CI_REPO_ID="1"
+
+BRANCH="${CI_COMMIT_BRANCH:-unknown}"
+COMMIT="${CI_COMMIT_SHA:0:7}"
+MESSAGE=$(echo "${CI_COMMIT_MESSAGE:-no message}" | tr '\n' ' ' | sed 's/"/\\"/g')
+AUTHOR="${CI_COMMIT_AUTHOR:-unknown}"
+PIPELINE_NUMBER="${CI_PIPELINE_NUMBER:-0}"
+REPO_ID="${CI_REPO_ID:-1}"
+TIMESTAMP=$(date "+%Y-%m-%d %H:%M:%S")
+
+CONTENT="## 🚀 Novalon Website 部署通知\n\n> **构建状态**: <font color=\"info\">成功</font>\n\n**项目信息**\n> 分支: \`${BRANCH}\`\n> 提交: \`${COMMIT}\`\n> 作者: ${AUTHOR}\n\n**提交信息**\n> ${MESSAGE}\n\n**操作**\n> [查看构建详情](https://ci.f.novalon.cn/repos/${REPO_ID}/pipeline/${PIPELINE_NUMBER})\n\n---\n> 时间: ${TIMESTAMP}\n> Pipeline #${PIPELINE_NUMBER}"
+
+printf '{"msgtype":"markdown","markdown":{"content":"%s"}}' "$CONTENT" > /tmp/payload.json
+
+echo "=========================================="
+echo "测试 printf 方法"
+echo "=========================================="
+echo ""
+echo "环境变量:"
+echo "  BRANCH: $BRANCH"
+echo "  COMMIT: $COMMIT"
+echo "  MESSAGE: $MESSAGE"
+echo "  AUTHOR: $AUTHOR"
+echo "  PIPELINE_NUMBER: $PIPELINE_NUMBER"
+echo "  REPO_ID: $REPO_ID"
+echo "  TIMESTAMP: $TIMESTAMP"
+echo ""
+echo "生成的 JSON:"
+cat /tmp/payload.json | python3 -m json.tool
+echo ""
+echo "✅ 测试完成！变量已正确展开"