- showPreview: Conditionally render email preview in list based on setting
- externalContentPolicy: Control external content (ask/block/allow modes)
- deleteAction: Move to trash or permanently delete based on preference
- debugMode: Add conditional logging via new lib/debug.ts utility
Also includes:
- Add moveToTrash method to JMAP client for trash-based deletion
- Update TODO.md with verified implementation status
- Migrate middleware.ts to proxy.ts (Next.js deprecation)
