rename theme unit lessons

docs/.vitepress/theme/components/VocabQuiz.vue

@@ -583,6 +583,10 @@ onMounted(async () => {
 
 onBeforeUnmount(() => {
   document.addEventListener("click", onModalClickOutside);
+
+  if (loadingIntervalId) {
+    clearInterval(loadingIntervalId);
+  }
 });
 </script>
 

docs/howtostudykorean/theme/index.md

@@ -26,10 +26,10 @@ The list above is by no means complete, but by knowing the grammar introduced in
 
 In addition to the pile of sentences that will be provided, common words that relate to the particular theme will be given. All of the vocabulary words introduced in our Theme Lessons will also be introduced somewhere in our regular lessons. The purpose of these Theme Lessons is to organize all of the words (and sentences) that focus on a central subject.
 
-- [Unit 1: #1 – School](./school.md)
-- [Unit 1: #2 – Transportation](./transportation.md)
-- [Unit 1: #3 – Eating](./eating.md)
-- [Unit 1: #4 – Shopping](./shopping.md)
+- [Unit 1: #1 – School](./01-school.md)
+- [Unit 1: #2 – Transportation](./02-transportation.md)
+- [Unit 1: #3 – Eating](./03-eating.md)
+- [Unit 1: #4 – Shopping](./04-shopping.md)
 - [Unit 1: #5 – Weather](https://www.howtostudykorean.com/theme/weather/ "(Theme) Unit 1: #5 – Weather")
 
 In time, we will continue to update more Theme Lessons to this Unit.

docs/index.md

@@ -11,10 +11,10 @@ hero:
 
 ## [Themes](./howtostudykorean/theme/index.md)
 
-- [School](./howtostudykorean/theme/school.md)
-- [Transportation](./howtostudykorean/theme/transportation.md)
-- [Eating](./howtostudykorean/theme/eating.md)
-- [Shopping](./howtostudykorean/theme/shopping.md)
+- [School](./howtostudykorean/theme/01-school.md)
+- [Transportation](./howtostudykorean/theme/02-transportation.md)
+- [Eating](./howtostudykorean/theme/03-eating.md)
+- [Shopping](./howtostudykorean/theme/04-shopping.md)
 
 ## Unit 1