fix: update core.file imports to core.workflow.file after merge

The File class and related modules were moved from core.file to
core.workflow.file in the sandboxed-agent branch. This commit
updates all remaining references including test mock/patch paths,
Switch component defaultValue→value changes, and account setting
tab constant updates.

Made-with: Cursor

api/core/agent/patterns/base.py

@@ -10,7 +10,7 @@ from collections.abc import Callable, Generator
 from typing import TYPE_CHECKING, Any
 
 from core.agent.entities import AgentLog, AgentResult, ExecutionContext
-from core.file import File
+from core.workflow.file import File
 from core.model_manager import ModelInstance
 from core.model_runtime.entities import (
     AssistantPromptMessage,

api/core/agent/patterns/function_call.py

@@ -12,7 +12,7 @@ from collections.abc import Generator
 from typing import Any, Union
 
 from core.agent.entities import AgentLog, AgentResult
-from core.file import File
+from core.workflow.file import File
 from core.model_runtime.entities import (
     AssistantPromptMessage,
     LLMResult,

api/core/agent/patterns/react.py

@@ -8,7 +8,7 @@ from typing import TYPE_CHECKING, Any, Union
 
 from core.agent.entities import AgentLog, AgentResult, AgentScratchpadUnit, ExecutionContext
 from core.agent.output_parser.cot_output_parser import CotAgentOutputParser
-from core.file import File
+from core.workflow.file import File
 from core.model_manager import ModelInstance
 from core.model_runtime.entities import (
     AssistantPromptMessage,

api/core/agent/patterns/strategy_factory.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 from typing import TYPE_CHECKING
 
 from core.agent.entities import AgentEntity, ExecutionContext
-from core.file.models import File
+from core.workflow.file.models import File
 from core.model_manager import ModelInstance
 from core.model_runtime.entities.model_entities import ModelFeature