refactor: Update Navbar to remove chat link and simplify navigation

- Remove the chat link from the Navbar, filtering out the '/chat' route from the navigation items.
- Simplify the rendering of navigation items by displaying only the item names without additional chat-related elements, enhancing clarity and user experience.

src/components/layout/Navbar.vue

@@ -249,20 +249,12 @@ const handleLogout = async () => {
           <LanguageSwitcher />
         </div>
 
-        <router-link v-for="item in navigation" :key="item.name" :to="item.href"
+        <router-link v-for="item in navigation.filter(nav => nav.href !== '/chat')" :key="item.name" :to="item.href"
           class="flex items-center gap-2 px-3 py-2 text-base font-medium text-muted-foreground hover:text-foreground transition-colors relative"
           :class="{
             'text-foreground': $route.path === item.href
           }" @click="isOpen = false">
-          <!-- Chat icon with notification badge -->
-          <div v-if="item.href === '/chat'" class="relative">
-            <MessageSquare class="h-4 w-4" />
-            <Badge v-if="totalUnreadMessages > 0" 
-                   class="absolute -top-2 -right-2 h-3.5 w-4 text-xs bg-red-500 text-white border-0 p-0 flex items-center justify-center">
-              {{ totalUnreadMessages > 99 ? '99+' : totalUnreadMessages }}
-            </Badge>
-          </div>
-          {{ item.name }}
+          <span>{{ item.name }}</span>
           <!-- Market preloading indicator -->
           <div v-if="item.href === '/market' && marketPreloader.isPreloading" 
                class="w-2 h-2 bg-blue-500 rounded-full animate-pulse"></div>