fix nit first step's input synchronized with flow schema

frontend/src/lib/components/flows/flowStore.ts

@@ -20,7 +20,7 @@ export async function copyFirstStepSchema(flowState: FlowState, flowStore: Writa
 		const firstModuleId = flow.value.modules[0]?.id
 
 		if (flowState[firstModuleId] && firstModuleId) {
-			flow.schema = flowState[firstModuleId].schema
+			flow.schema = structuredClone(flowState[firstModuleId].schema)
 			const v = flow.value.modules[0].value
 			if (v.type == 'rawscript' || v.type == 'script') {
 				Object.keys(v.input_transforms ?? {}).forEach((key) => {