Fix duplicate logout button

frontend/src/components/shared/Navbar.jsx

@@ -346,6 +346,16 @@ export default function Navbar() {
     return "U";
   };
 
+  const LogoutButton = ({ className = "" }) => (
+    <button
+      type="button"
+      onClick={handleLogout}
+      className={`px-2 text-[11px] font-semibold uppercase tracking-[0.09em] text-zinc-400 hover:text-black transition-colors duration-150 ${className}`}
+    >
+      Logout
+    </button>
+  );
+
   // ── Active link style ────────────────────────────────────────────────────
   // font-semibold + thin underline instead of font-black + decoration-4
   const isActive   = (path) => location.pathname === path;
@@ -517,12 +527,7 @@ export default function Navbar() {
               </Link>
 
               {/* Logout — lowest visual weight, plain text */}
-              <button
-                onClick={handleLogout}
-                className="px-2 text-[11px] font-semibold uppercase tracking-[0.09em] text-zinc-400 hover:text-black transition-colors duration-150"
-              >
-                Logout
-              </button>
+              <LogoutButton />
             </>
           )}
         </div>
@@ -735,12 +740,7 @@ export default function Navbar() {
                   GitHub Data <span className="text-zinc-300 text-sm">→</span>
                 </Link>
 
-                <button
-                  onClick={handleLogout}
-                  className="w-full px-5 py-3.5 text-[13px] font-semibold uppercase tracking-[0.09em] text-zinc-400 hover:text-black border-b border-zinc-100 hover:bg-zinc-50 transition-colors duration-150 text-left"
-                >
-                  Logout
-                </button>
+                <LogoutButton className="w-full px-5 py-3.5 text-[13px] border-b border-zinc-100 hover:bg-zinc-50 text-left" />
               </>
             )}
           </div>

frontend/src/pages/DashboardPage.jsx

@@ -1,15 +1,14 @@
 import { useState } from "react";
 import { useAuth } from "../context/AuthContext";
-import { useNavigate, Link } from "react-router-dom";
+import { Link } from "react-router-dom";
 import { useCodeforces } from "../hooks/useCodeforces";
 import ConnectBanner from "../components/codeforces/ConnectBanner";
 import VerifyModal from "../components/codeforces/VerifyModal";
 import DashboardExecutiveSummary from "../components/dashboard/DashboardExecutiveSummary";
 import LoaderSwitcher from "../components/shared/loaders/LoaderSwitcher";
 
 export default function DashboardPage() {
-  const { user, loading, logout } = useAuth();
-  const navigate = useNavigate();
+  const { user, loading } = useAuth();
   const [modalOpen, setModalOpen] = useState(false);
 
   const {
@@ -23,11 +22,6 @@ export default function DashboardPage() {
     connectError,
   } = useCodeforces(true);
 
-  const handleLogout = async () => {
-    await logout(); // clears HttpOnly cookies server-side
-    navigate("/");
-  };
-
   if (loading) {
     return <LoaderSwitcher />;
   }
@@ -44,12 +38,6 @@ export default function DashboardPage() {
               Welcome back, {user?.name || "Engineer"}.
             </p>
           </div>
-          <button
-            onClick={handleLogout}
-            className="px-6 sm:px-8 py-3 sm:py-4 border-4 border-black bg-white text-black font-black uppercase tracking-widest hover:bg-black hover:text-white transition-colors rounded-none w-full md:w-auto"
-          >
-            Logout
-          </button>
         </header>
 
         {/* AI Executive Summary - The Hero of the Dashboard */}