Refactor app navigation and enhance background handling in various views

- Added error handling for router navigation to prevent unhandled promise rejections.
- Improved background image management in Dashboard.vue to dynamically set images based on route.
- Introduced timers for managing loading states and cleanup on component unmount in Apps.vue, Marketplace.vue, and other views.
- Updated app detail navigation to ensure smoother transitions and error handling.
- Enhanced clipboard copy functionality in Settings.vue with improved user feedback.

neode-ui/src/views/AppDetails.vue

@@ -621,6 +621,7 @@ function goBack() {
   router.back()
 }
 
+
 function launchApp() {
   if (!pkg.value) return
   
@@ -771,8 +772,7 @@ async function confirmUninstall() {
   
   try {
     await store.uninstallPackage(appId.value)
-    // Navigate back to apps after uninstall
-    router.push('/dashboard/apps')
+    router.push('/dashboard/apps').catch(() => {})
   } catch (err) {
     console.error('Failed to uninstall app:', err)
     alert('Failed to uninstall app')