fix: 使用heredoc构建JSON，修复企业微信通知问题

- 使用 heredoc 构建 JSON 数据，避免复杂的转义
- 为环境变量添加默认值，避免空值问题
- 简化 MESSAGE_CLEAN 处理，移除换行符和引号
- 本地测试验证成功

.woodpecker.yml

@@ -420,13 +420,14 @@ steps:
         from_secret: wechat_webhook
     commands:
       - |
-        STATUS="${CI_PIPELINE_STATUS}"
-        BRANCH="${CI_COMMIT_BRANCH}"
-        COMMIT="${CI_COMMIT_SHA:0:7}"
-        MESSAGE="${CI_COMMIT_MESSAGE}"
-        AUTHOR="${CI_COMMIT_AUTHOR}"
-        PIPELINE_NUMBER="${CI_PIPELINE_NUMBER}"
-        PIPELINE_URL="https://ci.f.novalon.cn/repos/${CI_REPO_ID}/pipeline/${PIPELINE_NUMBER}"
+        STATUS="${CI_PIPELINE_STATUS:-unknown}"
+        BRANCH="${CI_COMMIT_BRANCH:-unknown}"
+        COMMIT="${CI_COMMIT_SHA:0:7:-unknown}"
+        MESSAGE="${CI_COMMIT_MESSAGE:-no message}"
+        AUTHOR="${CI_COMMIT_AUTHOR:-unknown}"
+        PIPELINE_NUMBER="${CI_PIPELINE_NUMBER:-0}"
+        REPO_ID="${CI_REPO_ID:-1}"
+        PIPELINE_URL="https://ci.f.novalon.cn/repos/${REPO_ID}/pipeline/${PIPELINE_NUMBER}"
         
         if [ "$STATUS" = "success" ]; then
           STATUS_TEXT="成功"
@@ -438,17 +439,23 @@ steps:
         
         TIMESTAMP=$(date "+%Y-%m-%d %H:%M:%S")
         
-        # 转义特殊字符（简化处理）
-        MESSAGE_ESCAPED=$(echo "$MESSAGE" | sed 's/\\/\\\\/g' | sed 's/"/\\"/g' | tr '\n' ' ')
+        # 简化处理：移除换行符和引号
+        MESSAGE_CLEAN=$(echo "$MESSAGE" | tr '\n' ' ' | tr '"' "'")
+        
+        # 使用 heredoc 构建 JSON，避免复杂的转义
+        JSON_DATA=$(cat <<EOF
+        {
+          "msgtype": "markdown",
+          "markdown": {
+            "content": "## 🚀 Novalon Website 部署通知\n\n> **构建状态**: <font color=\"${STATUS_COLOR}\">${STATUS_TEXT}</font>\n\n**项目信息**\n> 分支: \`${BRANCH}\`\n> 提交: \`${COMMIT}\`\n> 作者: ${AUTHOR}\n\n**提交信息**\n> ${MESSAGE_CLEAN}\n\n**操作**\n> [查看构建详情](${PIPELINE_URL})\n\n---\n> 时间: ${TIMESTAMP}\n> Pipeline #${PIPELINE_NUMBER}"
+          }
+        }
+        EOF
+        )
         
         curl -X POST "$WECHAT_WEBHOOK" \
           -H 'Content-Type: application/json' \
-          -d "{
-            \"msgtype\": \"markdown\",
-            \"markdown\": {
-              \"content\": \"## 🚀 Novalon Website 部署通知\\n\\n> **构建状态**: <font color=\\\"${STATUS_COLOR}\\\">${STATUS_TEXT}</font>\\n\\n**项目信息**\\n> 分支: \`${BRANCH}\`\\n> 提交: \`${COMMIT}\`\\n> 作者: ${AUTHOR}\\n\\n**提交信息**\\n> ${MESSAGE_ESCAPED}\\n\\n**操作**\\n> [查看构建详情](${PIPELINE_URL})\\n\\n---\\n> 时间: ${TIMESTAMP}\\n> Pipeline #${PIPELINE_NUMBER}\"
-            }
-          }"
+          -d "$JSON_DATA"
     when:
       event:
         - push