fix:#20 first fix auto dark mode switch

frontend/src/store/settingsStore.ts

@@ -17,17 +17,24 @@
 import { defineStore } from "pinia";
 import { useLocalStorage } from "@vueuse/core";
 
-const localeStore = defineStore("localeStore", {
+const settingsStore = defineStore("settingsStore", {
   state: () => {
     return {
       locale: useLocalStorage("locale", "en"), //useLocalStorage takes in a key of 'count' and default value of 0
+      isDark: true,
     };
   },
   actions: {
     setLocale(locale: string) {
       this.locale = locale;
     },
+    setDarkMode(isDark: boolean) {
+      this.isDark = isDark;
+    },
+    getDarkMode(): boolean {
+      return this.isDark;
+    }
   },
 });
 
-export default localeStore;
+export default settingsStore;