Remove theme toggle from the login page

Keep it in the main app header only.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/src/app/login/page.tsx

@@ -4,7 +4,6 @@ import type { Metadata } from "next";
 import { redirect } from "next/navigation";
 import { getConfig } from "@/lib/config/load";
 import { getSession } from "@/lib/auth/session";
-import { ThemeToggle } from "@/components/layout/theme-toggle";
 import { LoginForm } from "./login-form";
 
 export const metadata: Metadata = { title: "Sign in" };
@@ -17,10 +16,7 @@ export default async function LoginPage() {
   if (session.userId) redirect("/");
 
   return (
-    <div className="relative flex min-h-full flex-1 items-center justify-center px-4">
-      <div className="absolute top-4 right-4">
-        <ThemeToggle />
-      </div>
+    <div className="flex min-h-full flex-1 items-center justify-center px-4">
       <LoginForm />
     </div>
   );