many fixes of backeend and fronteend

frontend/src/main.tsx

@@ -9,6 +9,7 @@ import { ThemeProvider } from "./context/ThemeContext";
 import { ToastProvider } from "./components/ui/toast/ToastContainer";
 import { HeaderMetricsProvider } from "./context/HeaderMetricsContext";
 import { ErrorBoundary } from "./components/common/ErrorBoundary";
+import { BrowserRouter } from "react-router-dom";
 
 createRoot(document.getElementById("root")!).render(
   <StrictMode>
@@ -16,7 +17,9 @@ createRoot(document.getElementById("root")!).render(
       <ThemeProvider>
         <HeaderMetricsProvider>
           <ToastProvider>
-            <App />
+            <BrowserRouter>
+              <App />
+            </BrowserRouter>
           </ToastProvider>
         </HeaderMetricsProvider>
       </ThemeProvider>