1. Check for the existence and validity of the `WECHAT_API_KEY` environment variable.
2. List available WeChat accounts associated with the API key.
3. Identify the target WeChat account (either automatically if only one, or by prompting the user to choose).
4. Determine the format of the article (Markdown or HTML).
5. Call the WeChat API to publish the article to the drafts folder.
6. Report the success of the operation, including the publication ID and a reminder to manually review and publish in the WeChat admin panel.