Default: /usr/local/gniza/workdir (root) or ~/.local/state/gniza/workdir
(user). MySQL dumps and rclone temp configs now use WORK_DIR. Configurable
via gniza.conf or TUI Settings screen. Created during install.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace `is Select.BLANK` / `is not Select.BLANK` with isinstance
checks, as the sentinel identity varies across Textual versions.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>