feat: implement Account page and ThemeProvider; refactor App component and sidebar navigation

src/components/sidebar/AppSidebar.tsx

@@ -1,4 +1,3 @@
-import { Button } from '@/components/ui/button'
 import {
   Sidebar,
   SidebarContent,
@@ -7,10 +6,10 @@ import {
   SidebarMenu,
   SidebarMenuButton,
   SidebarMenuItem,
+  useSidebar,
 } from '@/components/ui/sidebar'
-import { useSidebar } from '@/components/ui/sidebar'
 import { useAuth } from '@/contexts/AuthContext'
-import { Activity, Home, LogOut, Settings, Users } from 'lucide-react'
+import { Activity, Home, Users } from 'lucide-react'
 import { Link, useLocation } from 'react-router'
 import { NavUser } from './NavUser'
 
@@ -25,11 +24,6 @@ const navigationItems = [
     href: '/activity',
     icon: Activity,
   },
-  {
-    title: 'Settings',
-    href: '/settings',
-    icon: Settings,
-  },
 ]
 
 const adminNavigationItems = [