feat(graph): Extend AgentState with checklist, current_step, and vfs

backend/tests/test_state_extensions.py

@@ -0,0 +1,15 @@
+from typing import get_type_hints, List, Dict, Any
+from ea_chatbot.graph.state import AgentState
+
+def test_agent_state_extensions():
+    """Verify that AgentState has the new DeepAgents fields."""
+    hints = get_type_hints(AgentState)
+    
+    assert "checklist" in hints
+    # checklist: List[Dict[str, Any]] (or similar for tasks)
+    
+    assert "current_step" in hints
+    assert hints["current_step"] == int
+    
+    assert "vfs" in hints
+    # vfs: Dict[str, Any]