feat: frontend alumnos sam-pruebas (RUT+clave, rendir y mis resultados)

frontend/middleware.ts

@@ -0,0 +1,23 @@
+import { NextResponse } from "next/server";
+import type { NextRequest } from "next/server";
+
+const COOKIE = "sam_pruebas_alumno";
+// Rutas que no requieren sesión.
+const PUBLICAS = ["/login"];
+
+export function middleware(req: NextRequest) {
+  const { pathname } = req.nextUrl;
+  if (pathname.startsWith("/api/")) return NextResponse.next();
+  if (PUBLICAS.some((p) => pathname === p || pathname.startsWith(p + "/"))) return NextResponse.next();
+  if (!req.cookies.get(COOKIE)) {
+    const url = req.nextUrl.clone();
+    url.pathname = "/login";
+    url.searchParams.set("next", pathname);
+    return NextResponse.redirect(url);
+  }
+  return NextResponse.next();
+}
+
+export const config = {
+  matcher: ["/((?!_next/static|_next/image|favicon.png|logo-sam.png|.*\\.svg).*)"]
+};