fix: resolve import migrations and test failures after segment 3 merge

- Migrate core.model_runtime -> dify_graph.model_runtime across 20+ files
- Migrate core.workflow.file -> dify_graph.file across 15+ files
- Migrate core.workflow.enums -> dify_graph.enums in service files
- Fix SandboxContext phantom import in dify_graph/context/__init__.py
- Fix core.app.workflow.node_factory -> core.workflow.node_factory
- Fix toast import paths (useToastContext from toast/context)
- Fix app-info.tsx import paths for relocated app-operations
- Fix 15 frontend test files for API changes, missing QueryClientProvider,
  i18n key renames, and component behavior changes

Made-with: Cursor

api/core/agent/patterns/base.py

@@ -11,7 +11,7 @@ from typing import TYPE_CHECKING, Any
 
 from core.agent.entities import AgentLog, AgentResult, ExecutionContext
 from core.model_manager import ModelInstance
-from core.model_runtime.entities import (
+from dify_graph.model_runtime.entities import (
     AssistantPromptMessage,
     LLMResult,
     LLMResultChunk,
@@ -19,10 +19,10 @@ from core.model_runtime.entities import (
     PromptMessage,
     PromptMessageTool,
 )
-from core.model_runtime.entities.llm_entities import LLMUsage
-from core.model_runtime.entities.message_entities import TextPromptMessageContent
+from dify_graph.model_runtime.entities.llm_entities import LLMUsage
+from dify_graph.model_runtime.entities.message_entities import TextPromptMessageContent
 from core.tools.entities.tool_entities import ToolInvokeMessage, ToolInvokeMeta
-from core.workflow.file import File
+from dify_graph.file import File
 
 if TYPE_CHECKING:
     from core.tools.__base.tool import Tool

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.model_runtime.entities import (
+from dify_graph.model_runtime.entities import (
     AssistantPromptMessage,
     LLMResult,
     LLMResultChunk,
@@ -23,7 +23,7 @@ from core.model_runtime.entities import (
     ToolPromptMessage,
 )
 from core.tools.entities.tool_entities import ToolInvokeMeta
-from core.workflow.file import File
+from dify_graph.file import File
 
 from .base import AgentPattern
 

api/core/agent/patterns/react.py

@@ -9,7 +9,7 @@ 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.model_manager import ModelInstance
-from core.model_runtime.entities import (
+from dify_graph.model_runtime.entities import (
     AssistantPromptMessage,
     LLMResult,
     LLMResultChunk,
@@ -17,7 +17,7 @@ from core.model_runtime.entities import (
     PromptMessage,
     SystemPromptMessage,
 )
-from core.workflow.file import File
+from dify_graph.file import File
 
 from .base import AgentPattern, ToolInvokeHook
 
@@ -204,7 +204,7 @@ class ReActStrategy(AgentPattern):
                     tool_names = [tool.name for tool in prompt_tools]
 
                     # Format tools as JSON for comprehensive information
-                    from core.model_runtime.utils.encoders import jsonable_encoder
+                    from dify_graph.model_runtime.utils.encoders import jsonable_encoder
 
                     tools_str = json.dumps(jsonable_encoder(prompt_tools), indent=2)
                     tool_names_str = ", ".join(f'"{name}"' for name in tool_names)

api/core/agent/patterns/strategy_factory.py

@@ -6,8 +6,8 @@ from typing import TYPE_CHECKING
 
 from core.agent.entities import AgentEntity, ExecutionContext
 from core.model_manager import ModelInstance
-from core.model_runtime.entities.model_entities import ModelFeature
-from core.workflow.file.models import File
+from dify_graph.model_runtime.entities.model_entities import ModelFeature
+from dify_graph.file.models import File
 
 from .base import AgentPattern, ToolInvokeHook
 from .function_call import FunctionCallStrategy