fix: clear markdown field when sending media messages via QQ Official Platform (#5445)

* fix: clear markdown field when sending media messages via QQ Official API

* refactor: use pop() to remove markdown key instead of setting None

Author: KBVsent

astrbot/core/platform/sources/qqofficial/qqofficial_message_event.py

@@ -162,6 +162,8 @@ async def _post_send(self, stream: dict | None = None):
                     )
                     payload["media"] = media
                     payload["msg_type"] = 7
+                    payload.pop("markdown", None)
+                    payload["content"] = plain_text or None
                 if record_file_path:  # group record msg
                     media = await self.upload_group_and_c2c_record(
                         record_file_path,
@@ -170,6 +172,8 @@ async def _post_send(self, stream: dict | None = None):
                     )
                     payload["media"] = media
                     payload["msg_type"] = 7
+                    payload.pop("markdown", None)
+                    payload["content"] = plain_text or None
                 ret = await self._send_with_markdown_fallback(
                     send_func=lambda retry_payload: self.bot.api.post_group_message(
                         group_openid=source.group_openid,  # type: ignore
@@ -188,6 +192,8 @@ async def _post_send(self, stream: dict | None = None):
                     )
                     payload["media"] = media
                     payload["msg_type"] = 7
+                    payload.pop("markdown", None)
+                    payload["content"] = plain_text or None
                 if record_file_path:  # c2c record
                     media = await self.upload_group_and_c2c_record(
                         record_file_path,
@@ -196,6 +202,8 @@ async def _post_send(self, stream: dict | None = None):
                     )
                     payload["media"] = media
                     payload["msg_type"] = 7
+                    payload.pop("markdown", None)
+                    payload["content"] = plain_text or None
                 if stream:
                     ret = await self._send_with_markdown_fallback(
                         send_func=lambda retry_payload: self.post_c2c_message(