feat: 新增 API 获取内容方式并优化微信发布流程

wechat_publisher.py

@@ -184,7 +184,8 @@ def publish_to_wechat(
     appid: str,
     appsecret: str,
     thumb_image_path: Optional[str] = None,
-    thumb_image_url: Optional[str] = None
+    thumb_image_url: Optional[str] = None,
+    author: str = ""
 ) -> bool:
     """
     便捷函数：发布文章到微信公众号草稿箱
@@ -196,6 +197,7 @@ def publish_to_wechat(
         appsecret: 微信公众号 AppSecret
         thumb_image_path: 封面图片本地路径（可选，与 thumb_image_url 二选一）
         thumb_image_url: 封面图片URL（可选，与 thumb_image_path 二选一）
+        author: 作者
 
     Returns:
         是否成功
@@ -219,7 +221,8 @@ def publish_to_wechat(
         result = publisher.add_draft(
             title=title,
             content=content,
-            thumb_media_id=thumb_media_id
+            thumb_media_id=thumb_media_id,
+            author=author
         )
 
         print(f"[WeChat] 草稿添加成功，media_id: {result.get('media_id')}")