feat: exercise form and submission list

frontend/src/utils/quiz.js

@@ -45,7 +45,7 @@ export class Quiz {
 			this.wrapper.innerHTML = `<iframe src="/lms/quiz/${quiz}?fromLesson=1" class="w-full h-[500px]"></iframe>`
 			return
 		}
-		this.wrapper.innerHTML = `<div class='border rounded-md p-10 text-center bg-surface-menu-bar mb-2'>
+		this.wrapper.innerHTML = `<div class='border rounded-md p-4 text-center bg-surface-menu-bar mb-4'>
             <span class="font-medium">
                 Quiz: ${quiz}
             </span>
@@ -68,7 +68,8 @@ export class Quiz {
 		app.mount(this.wrapper)
 	}
 
-	save(blockContent) {
+	save() {
+		if (Object.keys(this.data).length === 0) return {}
 		return {
 			quiz: this.data.quiz,
 		}