Add Better Auth admin authentication

proxy.ts

@@ -1,21 +1,18 @@
 import { NextResponse, type NextRequest } from "next/server";
 
-import { MOCK_SESSION_COOKIE_NAME } from "@/lib/mock-auth";
-import { shouldRedirectDashboardRequest } from "@/lib/proxy-auth";
+import { isAuthenticated } from "@/lib/auth-server";
+import { shouldRedirectDashboardRequest } from "@/lib/route-guards";
 
-export function proxy(request: NextRequest) {
-  if (
-    shouldRedirectDashboardRequest(
-      request.nextUrl.pathname,
-      request.cookies.get(MOCK_SESSION_COOKIE_NAME)?.value,
-    )
-  ) {
-    return NextResponse.redirect(new URL("/", request.url));
+export async function proxy(request: NextRequest) {
+  const hasSession = await isAuthenticated();
+
+  if (shouldRedirectDashboardRequest(request.nextUrl.pathname, hasSession)) {
+    return NextResponse.redirect(new URL("/login", request.url));
   }
 
   return NextResponse.next();
 }
 
 export const config = {
-  matcher: "/dashboard/:path*",
+  matcher: ["/dashboard/:path*"],
 };