add complete screen

src/app/auth/complete.tsx

@@ -0,0 +1,43 @@
+import { useEffect, useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+
+export function CompleteScreen() {
+  const navigate = useNavigate();
+  const [count, setCount] = useState(3);
+
+  useEffect(() => {
+    let counter: NodeJS.Timeout;
+
+    if (count > 0) {
+      counter = setTimeout(() => setCount(count - 1), 1000);
+    }
+
+    if (count === 0) {
+      navigate('/', { replace: true });
+    }
+
+    return () => {
+      clearTimeout(counter);
+    };
+  }, [count]);
+
+  return (
+    <div className="relative flex h-full w-full flex-col items-center justify-center">
+      <div className="mx-auto flex max-w-xl flex-col gap-1.5 text-center">
+        <h1 className="text-2xl font-light leading-none text-white">
+          <span className="font-semibold">You&apos;re ready</span>, redirecting in {count}
+          ...
+        </h1>
+        <p className="text-white/70">
+          Thank you for using Lume. Lume doesn&apos;t use telemetry. If you encounter any
+          problems, please submit a report via the &quot;Report Issue&quot; button.
+          <br />
+          You can find it while using the application.
+        </p>
+      </div>
+      <div className="absolute bottom-6 left-1/2 flex -translate-x-1/2 transform items-center justify-center">
+        <img src="/lume.png" alt="lume" className="h-auto w-1/5" />
+      </div>
+    </div>
+  );
+}