moving

apps/www/app/_lib/os-detection.ts

@@ -0,0 +1,15 @@
+export type OSId = 'macOS' | 'Windows' | 'Linux';
+
+/**
+ * Best-effort desktop OS detection from a User-Agent string.
+ *
+ * Mobile/tablet visitors return null so download CTAs stay generic instead of
+ * promising a desktop installer for the wrong platform.
+ */
+export function detectOSFromUserAgent(ua: string): OSId | null {
+  if (/iPhone|iPad|iPod|Android|Mobile|Tablet/i.test(ua)) return null;
+  if (/Mac/i.test(ua)) return 'macOS';
+  if (/Windows/i.test(ua)) return 'Windows';
+  if (/Linux/i.test(ua)) return 'Linux';
+  return null;
+}