Fixed bug where feedgen library was reversing the order of feed items.
Database returns notes in DESC order (newest first), but feedgen was
displaying them oldest-first in the RSS XML. Added reversed() wrapper
to maintain correct chronological order in the feed.
Added regression test to verify feed order matches database order.
Bug confirmed by testing:
- Database: [Note 2, Note 1, Note 0] (newest first)
- Old feed: [Note 0, Note 1, Note 2] (oldest first) ❌
- New feed: [Note 2, Note 1, Note 0] (newest first) ✅🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>