Implement automatic logout after inactivity and improve authentication

Adds session timeout functionality using `useSessionTimeout` hook and updates session maxAge to 15 minutes in server routes.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: dec54137-d5a2-4406-8ad4-5f2f9fb110bf
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/56f97713-69fd-41d1-b933-ff4440458da0.jpg

client/src/App.tsx

@@ -3,11 +3,15 @@ import { queryClient } from "./lib/queryClient";
 import { Toaster } from "@/components/ui/toaster";
 import { TooltipProvider } from "@/components/ui/tooltip";
 import { useAuth } from "@/hooks/useAuth";
+import { useSessionTimeout } from "@/hooks/useSessionTimeout";
 import Login from "@/pages/Login";
 import Dashboard from "@/pages/Dashboard";
 
 function AppContent() {
   const { isAuthenticated, isLoading } = useAuth();
+  
+  // Initialize session timeout management
+  useSessionTimeout();
 
   if (isLoading) {
     return (