- Implement parallel thumbnail queue (2 concurrent) for gallery view - Add BottomSheetModal file preview with 80% snap point - Add pull-to-refresh for directory listings - Fix image loading race conditions with Set-based in-flight tracking Also includes: - message-input: add Cmd+Shift+D dictation toggle shortcut - message: update user message bubble to darker zinc color - Add PRODUCTION.md deployment guide 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>