Clear notes from vuex store when logging out

frontend/components/Navbar.vue

@@ -50,6 +50,7 @@ export default {
     },
     methods: {
         async logout() {
+            this.$store.commit('notes/clear')
             await this.$auth.logout()
         },
         toggleTheme() {

frontend/store/notes.js

@@ -12,6 +12,10 @@ export const mutations = {
     delete(state, uuid) {
         state.notes = state.notes.filter((e) => e.uuid !== uuid)
     },
+    // used when logging out
+    clear(state) {
+        state.notes = []
+    },
 }
 
 export const actions = {