Low-stock warnings trigger at configured thresholds

With no low-stock signal, shoppers who would convert under urgency keep browsing and abandon, while a hardcoded threshold of 1 fires too late to move units before the SKU goes dark. The inverse failure — fabricated urgency with no real threshold — draws FTC scrutiny under scarcity-claim rules. Either way, a missing or non-configurable threshold hands revenue back to competitors and blocks the merchandising team from tuning behavior per category.

Read the threshold from an environment variable so ops can tune it per deployment, then gate the warning on positive stock to avoid rendering 'Only 0 left' messages. Put the logic in src/lib/inventory.ts and consume it from every product card:

const LOW_STOCK_THRESHOLD = parseInt(process.env.LOW_STOCK_THRESHOLD ?? '5', 10)

if (product.stock > 0 && product.stock <= LOW_STOCK_THRESHOLD) {
  return { ...product, lowStockWarning: `Only ${product.stock} left in stock` }
}