feat: improve app ui and project metadata

apps/web/components/ui/EmptyState.tsx

@@ -0,0 +1,38 @@
+import type { ReactNode } from "react";
+import type { LucideIcon } from "lucide-react";
+
+import { cn } from "@/lib/ui/variants";
+
+interface EmptyStateProps {
+  icon: LucideIcon;
+  title: string;
+  description: string;
+  action?: ReactNode;
+  className?: string;
+}
+
+export function EmptyState({
+  icon: Icon,
+  title,
+  description,
+  action,
+  className,
+}: EmptyStateProps) {
+  return (
+    <div
+      className={cn(
+        "rounded border border-dashed border-line bg-panel/70 px-6 py-10 text-center",
+        className,
+      )}
+    >
+      <div className="mx-auto mb-3 flex h-10 w-10 items-center justify-center rounded bg-[var(--color-cinnabar-wash)] text-cinnabar">
+        <Icon className="h-5 w-5" aria-hidden="true" />
+      </div>
+      <h2 className="font-serif text-lg text-ink">{title}</h2>
+      <p className="mx-auto mt-2 max-w-md text-sm leading-6 text-ink-soft">
+        {description}
+      </p>
+      {action ? <div className="mt-4">{action}</div> : null}
+    </div>
+  );
+}