feat: build production-ready wtr weather PWA

components/warnings/warning-card.tsx

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+"use client";
+
+import { motion } from "framer-motion";
+import { CalendarClock, MapPinned, Waves, CloudLightning } from "lucide-react";
+import type { WeatherWarning } from "@/types/imgw";
+import { formatDateTime } from "@/lib/weather-utils";
+import { Card } from "@/components/ui/card";
+import { cn } from "@/lib/utils";
+
+export function WarningCard({ warning, index = 0 }: { warning: WeatherWarning; index?: number }) {
+  const Icon = warning.kind === "hydro" ? Waves : CloudLightning;
+  const level = warning.level;
+  const levelLabel = level === -1 ? "Susza hydrologiczna" : level === null ? "Poziom nieokreślony" : `Stopień ${level}`;
+  const areasLabel = warning.areas.length > 8
+    ? `${warning.areas.slice(0, 8).join(", ")} i ${warning.areas.length - 8} więcej`
+    : warning.areas.join("; ");
+  return (
+    <motion.article initial={{ opacity: 0, y: 12 }} animate={{ opacity: 1, y: 0 }} transition={{ delay: Math.min(index * 0.04, 0.4), duration: 0.35 }}>
+      <Card className="h-full overflow-hidden p-5">
+        <div className="flex items-start justify-between gap-3">
+          <div className="rounded-2xl bg-amber-500/15 p-2.5 text-amber-700 dark:text-amber-300"><Icon className="size-5" /></div>
+          <span className={cn("rounded-full border px-2.5 py-1 text-xs font-semibold", level === -1 ? "border-orange-300/40 bg-orange-400/15 text-orange-800 dark:text-orange-200" : "border-amber-300/40 bg-amber-400/15 text-amber-800 dark:text-amber-200")}>{levelLabel}</span>
+        </div>
+        <p className="mt-5 text-xs font-semibold uppercase tracking-[0.15em] text-slate-500 dark:text-slate-400">{warning.kind === "hydro" ? "Hydrologiczne" : "Meteorologiczne"}</p>
+        <h2 className="mt-2 text-lg font-semibold tracking-tight">{warning.title}</h2>
+        {warning.description && <p className="mt-3 line-clamp-5 text-sm leading-6 text-slate-600 dark:text-slate-300">{warning.description}</p>}
+        <div className="mt-5 space-y-2 text-xs text-slate-500 dark:text-slate-400">
+          <p className="flex items-start gap-2"><CalendarClock className="mt-0.5 size-3.5 shrink-0" />{formatDateTime(warning.validFrom)} — {warning.validTo ? formatDateTime(warning.validTo) : "do odwołania"}</p>
+          <p className="flex items-start gap-2"><MapPinned className="mt-0.5 size-3.5 shrink-0" />{areasLabel || "Obszar nieokreślony"}</p>
+        </div>
+        {warning.probability !== null && <p className="mt-4 text-xs font-medium text-slate-600 dark:text-slate-300">Prawdopodobieństwo: {warning.probability}%</p>}
+      </Card>
+    </motion.article>
+  );
+}

components/warnings/warnings-panel.tsx

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+"use client";
+
+import { useWarnings } from "@/hooks/use-warnings";
+import { WarningCard } from "@/components/warnings/warning-card";
+import { PageLoadingSkeleton } from "@/components/states/loading-skeleton";
+import { EmptyState } from "@/components/states/empty-state";
+import { ErrorState } from "@/components/states/error-state";
+
+export function WarningsPanel() {
+  const { data: warnings, isPending, isError, refetch } = useWarnings();
+  if (isPending) return <PageLoadingSkeleton />;
+  if (isError) return <ErrorState onRetry={() => refetch()} description="Nie udało się pobrać ostrzeżeń meteorologicznych ani hydrologicznych." />;
+  if (!warnings?.length) return <EmptyState title="Brak aktywnych ostrzeżeń" description="IMGW nie publikuje obecnie ostrzeżeń meteorologicznych ani hydrologicznych." />;
+  return <div className="grid gap-4 md:grid-cols-2 xl:grid-cols-3">{warnings.map((warning, index) => <WarningCard key={warning.id} warning={warning} index={index} />)}</div>;
+}