Update footer to display app version and adjust styling

Refactor the footer in App.vue to include the application version and improve layout with flexbox. Remove the version display from StatusBox.vue and update the app version in version.js from 3.0.0 to 3.1.0.

frontend/src/App.vue

@@ -37,8 +37,9 @@
     </main>
 
     <footer class="app-footer" v-if="authStore.isAuthenticated">
-      <div class="container">
-        <p>&copy; 2025 TimeClock v3 - Zeiterfassungssystem</p>
+      <div class="container app-footer-inner">
+        <p class="app-footer-copy">&copy; 2025 TimeClock v3 – Zeiterfassungssystem</p>
+        <p class="app-footer-version">Version {{ appVersion }}</p>
       </div>
     </footer>
   </div>
@@ -52,8 +53,10 @@ import { computed } from 'vue'
 import StatusBox from './components/StatusBox.vue'
 import SideMenu from './components/SideMenu.vue'
 import AppBrand from './components/AppBrand.vue'
+import { APP_VERSION } from '@/config/version'
 
 const authStore = useAuthStore()
+const appVersion = APP_VERSION
 const router = useRouter()
 const route = useRoute()
 
@@ -270,15 +273,28 @@ const pageTitle = computed(() => {
   left: 0;
   right: 0;
   background-color: #f9f9f9;
-  padding: 1.5rem 0;
-  text-align: center;
+  padding: 1rem 0;
   color: #666;
   border-top: 1px solid #ddd;
   z-index: 1000;
 }
 
-.app-footer p {
+.app-footer-inner {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 1rem;
+}
+
+.app-footer-copy,
+.app-footer-version {
   margin: 0;
   font-size: 0.9rem;
 }
+
+.app-footer-version {
+  color: #888;
+  font-size: 0.85rem;
+  white-space: nowrap;
+}
 </style>

frontend/src/components/StatusBox.vue

@@ -29,7 +29,6 @@
         <span class="value" v-if="value !== null">{{ value || '—' }}</span>
       </div>
     </div>
-    <div class="status-version">TimeClock v{{ appVersion }}</div>
   </div>
   <div class="status-box loading" v-else>
     Lädt…
@@ -41,10 +40,7 @@ import { onMounted, onBeforeUnmount, ref, computed } from 'vue'
 import { useTimeStore } from '../stores/timeStore'
 import { useAuthStore } from '../stores/authStore'
 import { API_BASE_URL } from '@/config/api'
-import { APP_VERSION } from '@/config/version'
-
 const API_URL = API_BASE_URL
-const appVersion = APP_VERSION
 const timeStore = useTimeStore()
 const authStore = useAuthStore()
 const stats = ref({})
@@ -588,12 +584,4 @@ const displayRows = computed(() => {
   font-weight: 500; 
 }
 
-.status-version {
-  margin-top: 8px;
-  padding-top: 6px;
-  border-top: 1px solid #e8e8e8;
-  text-align: center;
-  font-size: 11px;
-  color: #888;
-}
 </style>

frontend/src/config/version.js

@@ -1,2 +1,2 @@
 /** Sichtbare Web-App-Version (synchron mit package.json). */
-export const APP_VERSION = '3.0.0'
+export const APP_VERSION = '3.1.0'