create sig in flow LO

src/routes/auth/username.tsx

@@ -0,0 +1,66 @@
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { createFileRoute, useNavigate } from "@tanstack/react-router";
+import { useState } from "react";
+
+export const Route = createFileRoute("/auth/username")({
+	component: RouteComponent,
+});
+
+function RouteComponent() {
+	const [username, setUsername] = useState("");
+	const navigate = useNavigate();
+
+	const handleSubmit = () => {
+		if (username.trim() === "") return;
+		navigate({
+			to: "/",
+			viewTransition: { types: ["warp"] },
+		});
+	};
+
+	return (
+		<div className="flex items-center justify-center h-full gap-10 tracking-[-2%] flex-col">
+			<div className="text-brand-gray text-center">
+				<p className="font-medium text-[48px] leading-[120%] ">
+					Welcome to Cytonic!
+				</p>
+				<p className="font-medium text-[32px] leading-[120%]">Sign in</p>
+				<p className="text-text-light-200 whitespace-nowrap mt-4">
+					Create a username
+				</p>
+			</div>
+
+			<div className="space-y-6 w-[300px]">
+				<Input
+					label="Username"
+					placeholder="Pink Axolotl"
+					value={username}
+					onChange={(e) => setUsername(e.target.value)}
+					onKeyDown={(e) => {
+						if (e.key === "Enter") {
+							handleSubmit();
+						}
+					}}
+				/>
+
+				<div className="space-y-2">
+					<Button
+						className="text-[18px] w-full"
+						disabled={username.trim() === ""}
+						onClick={handleSubmit}
+					>
+						Confirm
+					</Button>
+					<Button
+						variant={"secondary"}
+						className="text-[18px] w-full"
+						// onClick={handleSubmit}
+					>
+						Skip for now
+					</Button>
+				</div>
+			</div>
+		</div>
+	);
+}