fix: fix preprocessor preview

frontend/src/lib/components/ModuleTest.svelte

@@ -35,7 +35,6 @@
 	}
 
 	export function loadArgsAndRunTest() {
-		console.log('loadArgsAndRunTest', flowStateStore.val)
 		testSteps?.updateStepArgs(mod.id, flowStateStore.val, flowStore?.val, previewArgs?.val)
 		runTest(testSteps.getStepArgs(mod.id)?.value)
 	}

frontend/src/lib/components/flows/testSteps.svelte.ts

@@ -143,6 +143,10 @@ export class TestSteps {
 		flow: OpenFlow | undefined,
 		previewArgs: Record<string, any> | undefined
 	) {
+		if (id == 'preprocessor') {
+			this.#steps[id] = { value: {} }
+			return
+		}
 		if (!flowState || !flow) {
 			return
 		}