Update Layout and AccountSwitcher components to replace 'Notifications' with 'Messages' and add notification option in AccountSwitcher

src/components/Layout.tsx

@@ -1,5 +1,5 @@
 import { Link, useLocation } from 'react-router-dom';
-import { Home, Upload, Hash, Search, Bell, Settings } from 'lucide-react';
+import { Home, Upload, Hash, Search, MessageCircle, Settings } from 'lucide-react';
 import { LoginArea } from './auth/LoginArea';
 import { Button } from './ui/button';
 import { useTheme } from '@/hooks/useTheme';
@@ -18,7 +18,7 @@ export function Layout({ children }: LayoutProps) {
     { path: '/upload', icon: Upload, label: 'Upload' },
     { path: '/hashtags', icon: Hash, label: 'Hashtags' },
     { path: '/search', icon: Search, label: 'Search' },
-    { path: '/notifications', icon: Bell, label: 'Notifications' },
+    { path: '/messages', icon: MessageCircle, label: 'Messages' },
   ];
 
   const isActive = (path: string) => {

src/components/auth/AccountSwitcher.tsx

@@ -1,7 +1,7 @@
 // NOTE: This file is stable and usually should not be modified.
 // It is important that all functionality in this file is preserved, and should only be modified if explicitly requested.
 
-import { ChevronDown, LogOut, Settings, UserIcon, UserPlus, Wallet } from 'lucide-react';
+import { ChevronDown, LogOut, Settings, UserIcon, UserPlus, Wallet, Bell } from 'lucide-react';
 import {
   DropdownMenu,
   DropdownMenuContent,
@@ -81,6 +81,13 @@ export function AccountSwitcher({ onAddAccountClick }: AccountSwitcherProps) {
           </DropdownMenuItem>
         ))}
         <DropdownMenuSeparator />
+        <DropdownMenuItem
+          className='flex items-center gap-2 cursor-pointer p-2 rounded-md'
+          onSelect={() => navigate('/notifications')}
+        >
+          <Bell className='w-4 h-4' />
+          <span>Notifications</span>
+        </DropdownMenuItem>
         <DropdownMenuItem
           className='flex items-center gap-2 cursor-pointer p-2 rounded-md'
           onSelect={() => navigate('/profile-settings')}