✨ Add settings page

src/store.js

@@ -1,5 +1,19 @@
 import { computed } from "@vue/reactivity";
-import { ref } from "vue";
+import { ref, watch } from "vue";
+
+export const substitutionFilter = ref(
+  localStorage.getItem("substitutionFilter") || "all"
+);
+export const timetableClass = ref(
+  localStorage.getItem("timetableClass") || "none"
+);
+
+watch(substitutionFilter, (newValue) => {
+  localStorage.setItem("substitutionFilter", newValue);
+});
+watch(timetableClass, (newValue) => {
+  localStorage.setItem("timetableClass", newValue);
+});
 
 export const history = ref([]);