fix circular import

Author: SentienceDEV

sentience/tools/defaults.py

@@ -1,8 +1,10 @@
 from __future__ import annotations
 
 from pydantic import BaseModel, Field
+from typing import TYPE_CHECKING
 
-from ..agent_runtime import AgentRuntime
+if TYPE_CHECKING:
+    from ..agent_runtime import AgentRuntime
 from ..backends import actions as backend_actions
 from ..models import ActionResult, BBox, EvaluateJsRequest, Snapshot
 from .context import ToolContext
@@ -53,7 +55,7 @@ class EvaluateJsToolInput(BaseModel):
 
 
 def register_default_tools(
-    registry: ToolRegistry, runtime: ToolContext | AgentRuntime | None = None
+    registry: ToolRegistry, runtime: ToolContext | "AgentRuntime" | None = None
 ) -> ToolRegistry:
     """Register default browser tools on a registry."""