v1.8.0: warehouse module (16 commits), docházka mzda model, leave_type=holiday removal, api.ts race fix

Highlights:
- Warehouse module: receipts, issues, reservations, inventory, reports, dashboard,
  master data (categories, suppliers, locations), FIFO service, integration tests
- Docházka: mzda PDF counting model (Odpracováno / Vč. svátků / Přesčas / Svátek /
  So/Ne / Noc) with Czech weekday names and decimal hours
- AttendanceAdmin/AttendanceHistory KPI cards unified to mzda formula with
  fund bar colored by delta, badges for Práce/Dov/Nem/Sv/Nep
- Remove leave_type=holiday entirely (auto-computed from Czech public holidays)
- Allow multiple work shifts per day (overlap detection only)
- Pre-flight refresh in api.ts eliminates spurious 401s on fresh page loads
- Prisma: company_settings gets 6 nullable columns for warehouse numbering
  (PRI/VYD/INV prefixes, default patterns); migration seeds defaults

src/admin/hooks/useReducedMotion.ts

@@ -0,0 +1,24 @@
+import { useEffect, useState } from "react";
+
+/**
+ * Returns true when the user has expressed a preference for reduced motion
+ * (OS-level setting: `prefers-reduced-motion: reduce`).
+ *
+ * SSR-safe: starts as `false` (the default state), so the first render uses
+ * the normal animation. The effect then reconciles with the live matchMedia
+ * state on the client and re-renders if needed.
+ */
+export default function useReducedMotion(): boolean {
+  const [reduced, setReduced] = useState(false);
+
+  useEffect(() => {
+    if (typeof window === "undefined" || !window.matchMedia) return;
+    const mq = window.matchMedia("(prefers-reduced-motion: reduce)");
+    setReduced(mq.matches);
+    const onChange = () => setReduced(mq.matches);
+    mq.addEventListener("change", onChange);
+    return () => mq.removeEventListener("change", onChange);
+  }, []);
+
+  return reduced;
+}