feat: build production-ready wtr weather PWA

components/states/error-state.tsx

@@ -0,0 +1,14 @@
+import { RefreshCw, TriangleAlert } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { Card } from "@/components/ui/card";
+
+export function ErrorState({ title = "Nie udało się pobrać danych", description = "Sprawdź połączenie i spróbuj ponownie.", onRetry }: { title?: string; description?: string; onRetry: () => void }) {
+  return (
+    <Card className="flex min-h-52 flex-col items-center justify-center p-8 text-center">
+      <div className="mb-4 rounded-full bg-amber-500/15 p-3 text-amber-700 dark:text-amber-300"><TriangleAlert className="size-6" /></div>
+      <h2 className="text-lg font-semibold">{title}</h2>
+      <p className="mb-5 mt-2 max-w-md text-sm leading-6 text-slate-600 dark:text-slate-300">{description}</p>
+      <Button variant="glass" onClick={onRetry}><RefreshCw className="size-4" />Spróbuj ponownie</Button>
+    </Card>
+  );
+}