many fixes of backeend and fronteend

frontend/src/App.tsx

@@ -1,5 +1,5 @@
 import { Suspense, lazy, useEffect } from "react";
-import { BrowserRouter as Router, Routes, Route, Navigate } from "react-router-dom";
+import { Routes, Route, Navigate } from "react-router-dom";
 import { HelmetProvider } from "react-helmet-async";
 import AppLayout from "./layout/AppLayout";
 import { ScrollToTop } from "./components/common/ScrollToTop";
@@ -176,10 +176,9 @@ export default function App() {
     <>
       <GlobalErrorDisplay />
       <LoadingStateMonitor />
-      <Router>
-        <HelmetProvider>
-          <ScrollToTop />
-          <Routes>
+      <HelmetProvider>
+        <ScrollToTop />
+        <Routes>
           {/* Auth Routes - Public */}
           <Route path="/signin" element={<SignIn />} />
           <Route path="/signup" element={<SignUp />} />
@@ -832,8 +831,7 @@ export default function App() {
           {/* Fallback Route */}
           <Route path="*" element={<NotFound />} />
         </Routes>
-        </HelmetProvider>
-      </Router>
+      </HelmetProvider>
     </>
   );
 }