Ask for name and email before sending visitors to Amazon or Apple Books (switchable in admin → Books); v2.29.0

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitignore

@@ -59,3 +59,6 @@ data/episode-plays.json
 # Episode workflow progress — lives only in the server data volume
 data/podcast-workflow.json
 data/nuggets-workflow.json
+
+# Live download counters — server data volume only
+data/download-counts.json