Fix colors, replace Dropdown with Select, add clear layout

app/app.vue

@@ -1,12 +1,11 @@
 <script setup lang="ts">
 import { SidebarProvider } from '@/components/ui/sidebar';
-import AppSidebar from '@/components/ui/sidebar/AppSidebar.vue';
 
+const defaultOpen = useCookie<boolean>("sidebar_state");
 </script>
 
 <template>
-    <SidebarProvider>
-        <AppSidebar />
+    <SidebarProvider :defaultOpen="defaultOpen">
         <NuxtLayout>
             <NuxtPage />
         </NuxtLayout>