update user name display to use attendance store

frontend/src/components/HoursSummary.vue

@@ -15,7 +15,7 @@
         {{ formatHours(Math.abs(props.overtime_hours)) }}
       </div>
       <div class="user-name">
-        <h3 class="user-name">Marcin Nowak</h3>
+        <h3 class="user-name">{{ attendanceStore.employee }}</h3>
         <span @click="logoutUser">WYLOGUJ</span>
       </div>
     </div>
@@ -60,9 +60,11 @@
 <script setup>
 import { computed } from 'vue'
 import { useAuthStore } from '@/stores/authStore'
+import { useAttendanceStore } from '@/stores/attendanceStore'
 import { useRouter } from 'vue-router'
 import MonthMenu from './MonthMenu.vue'
 
+const attendanceStore = useAttendanceStore()
 const authStore = useAuthStore()
 const router = useRouter()