Update login page styling and sidebar collapse logo

src/components/layout/app-shell.tsx

@@ -5,7 +5,6 @@ import { usePathname } from "next/navigation"
 import { motion, AnimatePresence } from "framer-motion"
 import { Sidebar } from "./sidebar"
 import { Topbar } from "./topbar"
-import { SystemMonitor } from "./system-monitor"
 
 interface AppShellProps {
   children: React.ReactNode
@@ -80,7 +79,6 @@ export function AppShell({ children }: AppShellProps) {
         </svg>
       </div>
 
-      <SystemMonitor />
       <Sidebar
         collapsed={sidebarCollapsed}
         onToggle={toggleSidebar}