fix(frontend): prevent runnable to run if the script is not defined (#938)

frontend/src/lib/components/apps/components/common/TextComponent.svelte

@@ -16,5 +16,5 @@
 <InputValue input={componentInputs.content} bind:value={contentValue} />
 
 <AlignWrapper {horizontalAlignement} {verticalAlignement}>
-	<SvelteMarkdown source={contentValue} />
+	<SvelteMarkdown source={String(contentValue)} />
 </AlignWrapper>

frontend/src/lib/components/apps/components/helpers/RunnableComponent.svelte

@@ -147,6 +147,10 @@
 	)
 
 	async function executeComponent() {
+		if (!schema) {
+			return
+		}
+
 		outputs?.loading.set(true)
 
 		await testJobLoader?.abstractRun(() => {