- Custom oneline template (drops timestamp + commit-id hash from the
left pane); keeps change-id with shortest-unique-prefix highlighting,
bookmarks, conflict/empty labels, and the description first-line.
More room for the actually-useful columns.
- Drop the dim '── <change_id> ────' header above the preview; the
cursor row tee (├) now carries the 'this is what you're looking at'
signal.
- Box-char frame for the preview pane: top border (┌────) and left
border (│), with ├ replacing │ on the cursor row to draw the eye
from picker selection into preview content.
- Dynamic description clipping: the description fills whatever rows
are left after the file list (ellipsis on overflow). Replaces the
hard 3-line cap, which under-used vertical space for short file
lists and was buggy (didn't count blank lines within description).
- Bump VIEWPORT_MIN from 15 to 20 so the preview pane has enough
vertical room to be useful by default.
