Three layout improvements for better space utilization:
- Compact date headers: date labels render as left gutter column instead
of standalone lines, saving one line per date group in stream view
- Input drawer: capture bar expands to 4-line drawer with border, hints,
and live preview of parsed entity/search query
- Split-pane detail: wide terminals (>=100 cols) show list and detail
side-by-side with h/l focus switching, falling back to full-screen
detail on narrow terminals
lerko