Ask from the keyboard which neighbour a closed pane's rows go to

Del takes a side: `Del k` gives the closed pane's rows to the nearest
expanded pane above it, `Del j` to the one below, each falling back to the
other side when it has none. DelAbove and DelBelow are those two lines, with
no path of their own under SPC.

A bare Del started from a key -- SPC d, Enter on the tag word, a row run from
an output buffer -- on a pane with expanded panes both above and below asks
instead of guessing. The question is a prompt like Save's or a search's
(Pane.Prompt.del_side), so it is painted on the pane's notice band by the
same path, and the next key answers it before any mode sees it: k or Up,
j or Down, anything else keeps the pane, as does a click. Only a key press
sets Pardes.can_ask, so a click, a 9P ctl or event write, a startup line, a
restore and a shell exiting all close the pane at once, the rows going
where layout.absorbVWeight has always sent them. A collapsed pane is not
asked about (it has only a tag row to give), and collapsed neighbours are
passed over (layout.expandedNeighbor, which Collapse now uses too).

removePane and absorbVWeight take the recipient; every other caller passes
null. Three scripts that closed a middle pane with SPC d answer k, which
is where the rows went before, and their goldens are unchanged. delask.snap
covers the question, Esc, j, a clicked DelBelow and a clicked Del.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/CHANGELOG.md b/src/CHANGELOG.md
index 0083f97f..f8451baf 100644
--- a/src/CHANGELOG.md
+++ b/src/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 ## 0.0.3
 
+- `Del` takes a side. `Del k` and `DelAbove` give the closed pane's rows to
+  the expanded pane above it, `Del j` and `DelBelow` to the one below. A bare
+  `Del` from the keyboard on a pane with panes both above and below asks on
+  its notice band, and one key answers; a click, a 9P write or a script
+  still closes it at once, rows going up as before.
+- A prompt (Save's path, a search, a pipe) is drawn in the tagline's pitch
+  like the other notices instead of spread one glyph to a body cell, and in
+  the SDL shell every notice chip is ruled off from the body like a tagline.
 - Answer 9P on the connection's task instead of the editor's loop. The core
   is single-threaded and `pardes.turn` says whose turn it is with it: the
   editor's by default, given up while it waits for input and while a step of