docs: update docstrings for message metadata and reply fields; fix markdown capability check in format instructions; improve streaming card update logic in Feishu

app/agent/callback/__init__.py

@@ -162,6 +162,8 @@ class StreamingHandler:
         :param user_id: 用户ID
         :param username: 用户名
         :param title: 消息标题
+        :param original_message_id: 原始消息ID（如果是回复消息）
+        :param original_chat_id: 原始聊天ID（如果是回复消息）
         """
         self._channel = channel
         self._source = source

app/agent/prompt/__init__.py

@@ -312,7 +312,7 @@ class PromptManager:
         根据渠道能力动态生成格式指令
         """
         instructions = []
-        if ChannelCapability.RICH_TEXT not in caps.capabilities:
+        if ChannelCapability.MARKDOWN not in caps.capabilities:
             instructions.append(
                 "- Formatting: Use **Plain Text ONLY**. The channel does NOT support Markdown."
             )