fix: DuckDuckGo image search tool error (#5606)

api/core/agent/cot_agent_runner.py

         )
 
         # publish files
-        for message_file, save_as in message_files:
+        for message_file_id, save_as in message_files:
             if save_as:
                 self.variables_pool.set_file(
-                    tool_name=tool_call_name, value=message_file.id, name=save_as)
+                    tool_name=tool_call_name, value=message_file_id, name=save_as)
 
             # publish message file
             self.queue_manager.publish(QueueMessageFileEvent(
-                message_file_id=message_file.id
+                message_file_id=message_file_id
             ), PublishFrom.APPLICATION_MANAGER)
             # add message file ids
-            message_file_ids.append(message_file.id)
+            message_file_ids.append(message_file_id)
 
         return tool_invoke_response, tool_invoke_meta
 

api/core/agent/fc_agent_runner.py

                         agent_tool_callback=self.agent_callback,
                     )
                     # publish files
-                    for message_file, save_as in message_files:
+                    for message_file_id, save_as in message_files:
                         if save_as:
-                            self.variables_pool.set_file(tool_name=tool_call_name, value=message_file.id, name=save_as)
+                            self.variables_pool.set_file(tool_name=tool_call_name, value=message_file_id, name=save_as)
 
                         # publish message file
                         self.queue_manager.publish(QueueMessageFileEvent(
-                            message_file_id=message_file.id
+                            message_file_id=message_file_id
                         ), PublishFrom.APPLICATION_MANAGER)
                         # add message file ids
-                        message_file_ids.append(message_file.id)
+                        message_file_ids.append(message_file_id)
                     
                     tool_response = {
                         "tool_call_id": tool_call_id,

api/core/app/task_pipeline/message_cycle_manage.py

                     extension = '.bin'
             else:
                 extension = '.bin'
-            # add sign url
-            url = ToolFileManager.sign_file(tool_file_id=tool_file_id, extension=extension)
+            # add sign url to local file
+            if message_file.url.startswith('http'):
+                url = message_file.url
+            else:
+                url = ToolFileManager.sign_file(tool_file_id=tool_file_id, extension=extension)
 
             return MessageFileStreamResponse(
                 task_id=self._application_generate_entity.task_id,

api/core/file/file_obj.py

             'type': self.type.value,
             'transfer_method': self.transfer_method.value,
             'url': self.preview_url,
+            'remote_url': self.url,
             'related_id': self.related_id,
             'filename': self.filename,
             'extension': self.extension,

api/core/tools/provider/builtin/duckduckgo/tools/ddgo_img.py

             "max_results": tool_parameters.get('max_results'),
         }
         response = DDGS().images(**query_dict)
-        results = []
+        result = []
         for res in response:
-            results.append(self.create_image_message(image=res.get("image")))
-        return results
+            msg = ToolInvokeMessage(type=ToolInvokeMessage.MessageType.IMAGE_LINK,
+                                    message=res.get('image'),
+                                    save_as='',
+                                    meta=res)
+            result.append(msg)
+        return result

api/core/tools/tool_engine.py

 from copy import deepcopy
 from datetime import datetime, timezone
 from mimetypes import guess_type
-from typing import Union
+from typing import Any, Union
 
 from yarl import URL
 
         agent_message: Message,
         invoke_from: InvokeFrom,
         user_id: str
-    ) -> list[tuple[MessageFile, bool]]:
+    ) -> list[tuple[Any, str]]:
         """
         Create message file
 
             db.session.refresh(message_file)
 
             result.append((
-                message_file,
+                message_file.id,
                 message.save_as
             ))
 

api/core/workflow/nodes/tool/tool_node.py

                     tenant_id=self.tenant_id,
                     type=FileType.IMAGE,
                     transfer_method=FileTransferMethod.TOOL_FILE,
+                    url=url,
                     related_id=tool_file_id,
                     filename=filename,
                     extension=ext,

web/app/components/base/image-gallery/index.tsx

           src={src}
           alt=''
           onClick={() => setImagePreviewUrl(src)}
+          onError={e => e.currentTarget.remove()}
         />
       ))}
       {