feat: add bucket browser

src/components/ui/goto-top-btn.tsx

@@ -0,0 +1,49 @@
+import { useEffect, useRef, useState } from "react";
+import Button from "./button";
+import { ArrowUp } from "lucide-react";
+import { cn } from "@/lib/utils";
+
+const GotoTopButton = () => {
+  const mainElRef = useRef<HTMLElement | null>(null);
+  const [show, setShow] = useState(false);
+
+  useEffect(() => {
+    const mainEl = document.querySelector("main");
+    if (!mainEl) return;
+
+    mainElRef.current = mainEl;
+
+    const onScroll = () => {
+      if (mainEl.scrollTop > 300) {
+        setShow(true);
+      } else {
+        setShow(false);
+      }
+    };
+
+    mainEl.addEventListener("scroll", onScroll);
+    return () => mainEl.removeEventListener("scroll", onScroll);
+  }, []);
+
+  const onClick = () => {
+    const mainEl = mainElRef.current;
+    if (!mainEl) return;
+
+    mainEl.scrollTo({ top: 0, behavior: "smooth" });
+  };
+
+  return (
+    <Button
+      icon={ArrowUp}
+      className={cn(
+        "fixed bottom-4 right-4 invisible opacity-0 transition-opacity",
+        show && "visible opacity-100"
+      )}
+      onClick={onClick}
+    >
+      Top
+    </Button>
+  );
+};
+
+export default GotoTopButton;