Address code review feedback

- Add validation to ensure only one context parameter is provided in get_message_by_id
- Simplify logger check in error handling

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

src/langbot/libs/qq_official_api/api.py

@@ -291,6 +291,15 @@ class QQOfficialClient:
         """
         if not await self.check_access_token():
             await self.get_access_token()
+        
+        # Validate that exactly one context parameter is provided
+        provided_contexts = sum([bool(channel_id), bool(group_openid), bool(user_openid)])
+        if provided_contexts == 0:
+            await self.logger.warning(f'Cannot fetch message {message_id}: no context provided')
+            return {}
+        if provided_contexts > 1:
+            await self.logger.warning(f'Cannot fetch message {message_id}: multiple contexts provided')
+            return {}
             
         # Determine which API endpoint to use based on provided parameters
         if channel_id:
@@ -302,9 +311,6 @@ class QQOfficialClient:
         elif user_openid:
             # Private message
             url = f'{self.base_url}/v2/users/{user_openid}/messages/{message_id}'
-        else:
-            await self.logger.warning(f'Cannot fetch message {message_id}: no valid context provided')
-            return {}
             
         async with httpx.AsyncClient() as client:
             headers = {

src/langbot/pkg/platform/sources/qqofficial.py

@@ -70,7 +70,7 @@ class QQOfficialMessageConverter(abstract_platform_adapter.AbstractMessageConver
                                         content_type=attachment.get('content_type', '')
                                     )
                                     quoted_chain.append(platform_message.Image(base64=img_base64))
-                                except Exception as e:
+                                except Exception:
                                     # If image fetch fails, just skip it
                                     pass
                     
@@ -89,8 +89,7 @@ class QQOfficialMessageConverter(abstract_platform_adapter.AbstractMessageConver
                     )
             except Exception as e:
                 # If fetching quoted message fails, log and continue
-                if self.bot and hasattr(self.bot, 'logger'):
-                    await self.bot.logger.warning(f'Failed to fetch quoted message {referenced_msg_id}: {e}')
+                await self.bot.logger.warning(f'Failed to fetch quoted message {referenced_msg_id}: {e}')
         
         if pic_url is not None:
             base64_url = await image.get_qq_official_image_base64(pic_url=pic_url, content_type=content_type)