Fixed: #1004

feat(translator): add function name to response output item serialization

- Included `item.name` in the serialized response output to enhance output item handling.

internal/translator/claude/openai/responses/claude_openai-responses_response.go

@@ -251,6 +251,7 @@ func ConvertClaudeResponseToOpenAIResponses(ctx context.Context, modelName strin
 			itemDone, _ = sjson.Set(itemDone, "item.id", fmt.Sprintf("fc_%s", st.CurrentFCID))
 			itemDone, _ = sjson.Set(itemDone, "item.arguments", args)
 			itemDone, _ = sjson.Set(itemDone, "item.call_id", st.CurrentFCID)
+			itemDone, _ = sjson.Set(itemDone, "item.name", st.FuncNames[idx])
 			out = append(out, emitEvent("response.output_item.done", itemDone))
 			st.InFuncBlock = false
 		} else if st.ReasoningActive {