优化输出

backend/app/core/__init__.py

@@ -1,6 +1,7 @@
 """核心模块 - 基类和通用工具"""
 
-from .formatter import MarkdownFormatter
+from .formatter import MarkdownFormatter, OutputRenderer, get_formatter
+from .stream_finalizer import StreamFinalizer, create_finalizer
 from .state_base import BaseState
 from .human_review import (
     ReviewManager,
@@ -23,6 +24,10 @@ from .visualization import (
 
 __all__ = [
     "MarkdownFormatter",
+    "OutputRenderer",
+    "get_formatter",
+    "StreamFinalizer",
+    "create_finalizer",
     "BaseState",
     "ReviewManager",
     "InMemoryReviewStore",