Remove chat bubble and fix dock icon sizing for better usability

Remove Chatbot component from App.tsx and adjust dock icon sizes in os.tsx to fit containers.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 279f1558-c0e3-40e4-8217-be7e9f4c6eca
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Replit-Commit-Event-Id: 12d0732e-a7dc-4ae4-9d8b-9e68f0699715
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client/src/App.tsx

@@ -27,7 +27,6 @@ import AdminNotifications from "@/pages/admin-notifications";
 import AeThexOS from "@/pages/os";
 import Network from "@/pages/network";
 import NetworkProfile from "@/pages/network-profile";
-import { Chatbot } from "@/components/Chatbot";
 
 function Router() {
   return (
@@ -66,7 +65,6 @@ function App() {
         <TutorialProvider>
           <Toaster />
           <Router />
-          <Chatbot />
         </TutorialProvider>
       </AuthProvider>
     </QueryClientProvider>

client/src/pages/os.tsx

@@ -1674,7 +1674,10 @@ function Taskbar({ windows, activeWindowId, apps, time, showStartMenu, user, isA
                 }}
                 data-testid={`dock-${appId}`}
               >
-                <div className="w-4 h-4" style={{ color: isOpen ? clearanceTheme.accent : 'rgba(255,255,255,0.7)' }}>
+                <div 
+                  className="w-4 h-4 flex items-center justify-center [&>svg]:w-4 [&>svg]:h-4" 
+                  style={{ color: isOpen ? clearanceTheme.accent : 'rgba(255,255,255,0.7)' }}
+                >
                   {app.icon}
                 </div>
                 {isOpen && (