Function setCache

src/components/FieldDetailView.tsx:104–108

(key: string, id: string, data: T)

  try { const c = localStorage.getItem(key); return c ? JSON.parse(c) : {}; } catch { return {}; }
}
function setCache<T>(key: string, id: string, data: T) {
  const cache = getCache<T>(key);
  (cache as any)[id] = { data, timestamp: Date.now() };
  localStorage.setItem(key, JSON.stringify(cache));
}

function ndviColor(val: number): string {
  if (val > 0.6) return "hsl(var(--field-green, 140 40% 40%))";