Initial commit: EatMe attendance tracker

Google-SSO PWA for bistro employee clock-in/out, admin employee
management, and stats with CSV export. Express + SQLite backend,
React + Zustand frontend in the light-mono-tui design language.
Multi-stage Dockerfile, compose.yaml for image-based deploys, nginx
reverse-proxy template, and an OKF documentation bundle in docs/.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/components/MonthNav.tsx

@@ -0,0 +1,21 @@
+import { formatMonthLabel } from '../lib/month';
+
+interface Props {
+  month: string;
+  onPrev: () => void;
+  onNext: () => void;
+}
+
+export function MonthNav({ month, onPrev, onNext }: Props) {
+  return (
+    <div className="month-nav">
+      <button className="btn" onClick={onPrev} aria-label="Předchozí měsíc">
+        &lt;
+      </button>
+      <div className="month-nav-label">{formatMonthLabel(month)}</div>
+      <button className="btn" onClick={onNext} aria-label="Následující měsíc">
+        &gt;
+      </button>
+    </div>
+  );
+}