fix(serialization): Fix Path serialization in events and thread-local fallback in ai_client

tests/test_event_serialization.py

@@ -0,0 +1,38 @@
+import json
+from pathlib import Path
+from src.events import UserRequestEvent
+
+def test_user_request_event_serialization():
+ # Setup payload with nested Path objects
+ file_items = [
+  {"path": Path("some/file.txt"), "mtime": 1234.5},
+  {"path": Path("another/path"), "metadata": {"sub_path": Path("sub/path")}}
+ ]
+ base_dir = Path("C:/projects/test")
+ 
+ event = UserRequestEvent(
+  prompt="Test prompt",
+  stable_md="# Context",
+  file_items=file_items,
+  disc_text="Discussion history",
+  base_dir=str(base_dir)
+ )
+ 
+ # Execute serialization
+ result = event.to_dict()
+ 
+ # Verify no Path objects remain
+ assert isinstance(result["file_items"][0]["path"], str)
+ assert result["file_items"][0]["path"] == str(Path("some/file.txt"))
+ assert isinstance(result["file_items"][1]["metadata"]["sub_path"], str)
+ assert result["file_items"][1]["metadata"]["sub_path"] == str(Path("sub/path"))
+ 
+ # Verify JSON serializability
+ try:
+  json.dumps(result)
+ except (TypeError, OverflowError) as e:
+  assert False, f"Result not JSON serializable: {e}"
+
+if __name__ == "__main__":
+ test_user_request_event_serialization()
+ print("Test passed!")