sign in and register fixes for looped and forwarded pages

app/page.tsx

@@ -3,19 +3,35 @@ import { cookies } from "next/headers";
 import { redirect } from "next/navigation";
 import SignIn from "@/app/auth/sign-in/sign-in";
 import SignUp from "@/app/auth/sign-up/sign-up";
+import { isJwtValid } from "@/lib/jwt";
 
-export default async function HomePage() {
-  // If already signed in, go straight to the app
+type SearchParams = { [key: string]: string | string[] | undefined };
+
+export default async function HomePage({
+  searchParams,
+}: {
+  searchParams?: SearchParams;
+}) {
+  // If already signed in with a VALID token, go straight to the app
   const ck = await cookies();
   const at = ck.get("ma_at")?.value;
-  if (at) redirect("/portal");
+  if (isJwtValid(at)) redirect("/portal");
+
+  const reauth = searchParams?.reauth === "1";
 
   return (
     <main className="mx-auto max-w-5xl px-4 py-12">
+    {reauth && (
+      <p className="mb-6 rounded-md border bg-yellow-50 p-3 text-sm text-yellow-900">
+      Your session expired. Please sign in again.
+      </p>
+    )}
+
     <section className="mb-10 text-center">
     <h1 className="text-3xl font-bold tracking-tight">MakeArmy</h1>
     <p className="mt-2 text-base text-muted-foreground">
-    Free to use. Manage laser rigs, settings, and projects—all in one place.
+    Free to use. Manage laser rigs, settings, and projects—all in one
+    place.
     </p>
     </section>
 
@@ -29,12 +45,13 @@ export default async function HomePage() {
     <div className="rounded-lg border p-6">
     <h2 className="mb-3 text-lg font-semibold">Sign in</h2>
     {/* Uses your existing sign-in component */}
-    <SignIn nextPath="/portal" reauth={false} />
+    <SignIn nextPath="/portal" reauth={reauth} />
     </div>
     </section>
 
     <section className="mt-8 text-center text-xs text-muted-foreground">
-    We only use cookies strictly necessary to operate the site (e.g., your sign-in session).
+    We only use cookies strictly necessary to operate the site (e.g., your
+    sign-in session).
     </section>
     </main>
   );