registration fix

app/auth/sign-up/page.tsx

@@ -3,8 +3,19 @@ import { cookies } from "next/headers";
 import { redirect } from "next/navigation";
 import SignUp from "./sign-up";
 
-export default async function SignUpPage() {
-    const at = (await cookies()).get("ma_at")?.value;
+export default async function SignUpPage({
+    searchParams,
+}: {
+    searchParams?: Record<string, string | string[] | undefined>;
+}) {
+    const ck = await cookies();
+    const at = ck.get("ma_at")?.value;
     if (at) redirect("/portal");
-    return <SignUp nextPath="/portal" />;
+
+    const sp = searchParams ?? {};
+    const nextParam = Array.isArray(sp.next) ? sp.next[0] : sp.next;
+    const nextPath =
+    nextParam && String(nextParam).startsWith("/") ? String(nextParam) : "/portal";
+
+    return <SignUp nextPath={nextPath} />;
 }

app/auth/sign-up/sign-up.tsx

@@ -15,36 +15,60 @@ export default function SignUp({ nextPath = "/portal" }: Props) {
     const [loading, setLoading] = useState(false);
     const [err, setErr] = useState<string | null>(null);
 
-    const onSubmit = useCallback(async (e: React.FormEvent<HTMLFormElement>) => {
-        e.preventDefault();
-        setErr(null);
-        setLoading(true);
+    const onSubmit = useCallback(
+        async (e: React.FormEvent<HTMLFormElement>) => {
+            e.preventDefault();
+            setErr(null);
 
-        try {
-            const res = await fetch("/api/auth/register", {
-                method: "POST",
-                credentials: "include",
-                headers: { "Content-Type": "application/json", Accept: "application/json" },
-                body: JSON.stringify({ username, email: email || undefined, password }),
-            });
+            const u = username.trim();
+            const em = email.trim().toLowerCase();
+            const pw = password;
 
-            const txt = await res.text();
-            let j: any = null;
-            try { j = txt ? JSON.parse(txt) : null; } catch {}
-
-            if (!res.ok) {
-                const message = j?.error || j?.message || `Sign-up failed (${res.status})`;
-                throw new Error(message);
+            if (!u) {
+                setErr("Username is required.");
+                return;
+            }
+            if (!pw || pw.length < 8) {
+                setErr("Password must be at least 8 characters.");
+                return;
             }
 
-            router.replace(nextPath); // ALWAYS /portal
-            router.refresh();
-        } catch (e: any) {
-            setErr(e?.message || "Unable to sign up.");
-        } finally {
-            setLoading(false);
-        }
-    }, [username, email, password, nextPath, router]);
+            setLoading(true);
+            try {
+                const res = await fetch("/api/auth/register", {
+                    method: "POST",
+                    credentials: "include",
+                    headers: { "Content-Type": "application/json", Accept: "application/json" },
+                    body: JSON.stringify({ username: u, email: em || undefined, password: pw }),
+                });
+
+                const txt = await res.text();
+                let j: any = null;
+                try {
+                    j = txt ? JSON.parse(txt) : null;
+                } catch {
+                    j = null;
+                }
+
+                if (!res.ok) {
+                    const message =
+                    (j?.error && j?.debug ? `${j.error} (${j.debug})` : j?.error) ||
+                    j?.message ||
+                    `Sign-up failed (${res.status})`;
+                    throw new Error(message);
+                }
+
+                // If the server has AUTO_LOGIN on, user is already signed in here.
+                router.replace(nextPath);
+                router.refresh();
+            } catch (e: any) {
+                setErr(e?.message || "Unable to sign up.");
+            } finally {
+                setLoading(false);
+            }
+        },
+        [username, email, password, nextPath, router]
+    );
 
     return (
         <div className="mx-auto max-w-md rounded-lg border p-6">
@@ -66,7 +90,9 @@ export default function SignUp({ nextPath = "/portal" }: Props) {
         </div>
 
         <div className="space-y-1">
-        <label className="text-sm font-medium">Email <span className="opacity-60">(optional)</span></label>
+        <label className="text-sm font-medium">
+        Email <span className="opacity-60">(optional)</span>
+        </label>
         <input
         type="email"
         autoComplete="email"
@@ -82,43 +108,4 @@ export default function SignUp({ nextPath = "/portal" }: Props) {
         <label className="text-sm font-medium">Password</label>
         <button
         type="button"
-        className="text-xs opacity-70 hover:opacity-100"
-        onClick={() => setShowPassword((s) => !s)}
-        >
-        {showPassword ? "Hide" : "Show"}
-        </button>
-        </div>
-        <input
-        type={showPassword ? "text" : "password"}
-        autoComplete="new-password"
-        className="w-full rounded-md border px-3 py-2"
-        placeholder="Choose a strong password"
-        value={password}
-        onChange={(e) => setPassword(e.currentTarget.value)}
-        required
-        minLength={8}
-        />
-        </div>
-
-        {err && (
-            <div className="rounded-md border border-red-300 bg-red-50 px-3 py-2 text-sm text-red-700">
-            {err}
-            </div>
-        )}
-
-        <button
-        type="submit"
-        disabled={loading}
-        className="w-full rounded-md bg-black px-3 py-2 text-white disabled:opacity-60"
-        >
-        {loading ? "Creating account…" : "Sign Up"}
-        </button>
-        </form>
-
-        <div className="mt-4 text-center text-sm">
-        <span className="opacity-70">Already have an account?</span>{" "}
-        <a className="underline" href={"/auth/sign-in"}>Sign in</a>
-        </div>
-        </div>
-    );
-}
+        className="text-xs opaci