🇰🇷 한국어 버전When a single line — "Excel download" — is added to a spec, the work that lands on the developer is far larger than that line suggests.If dumping data into a grid were all that was needed, CSV would be enough. Real requirements rarely stop there: a header with the company logo, merged title cells, per-category background colors, a formula in the totals row, a chart at the bottom. And ..