A dailies picker (zkd-style): lists the last `journal_days` (default 7) days
newest-first, previews existing journals and shows "@create" for new ones, and
opens the chosen day (creating if new). Journals resolve by their ISO-date
title, so no new RPC is needed. picker.select gains an optional Telescope
preview pane. e2e covers the recent-days list (exists/@create across a month
boundary) and open-on-pick via a stubbed vim.ui.select.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
