A pane tag wraps onto rows and can collapse to one, as acme's does

acme's frame wraps a tag at its right edge and the window grows to show
every row (wind.c wintaglines); Tagup/Tagdown shrink it to one row and back.
Pane tags used to be one row, scrolled sideways to the caret. Now a tag's
lines wrap at its width (one cell kept for the caret past a full row) and it
starts expanded; insert-mode Up on the first row collapses it, Down on the
last row expands it, and Alt-Up/Alt-Down do so in either mode. A word the
wrap breaks across rows is still one word to a click and a selection.
Column and workspace tags keep scrolling sideways.

Tests read body rows relative to the body's first row; the 41 snapshot
goldens that moved were re-recorded by name after a programmatic check that
each differs only by body rows shifting under the taller tags, and twelve
scripts whose clicks targeted fixed rows now click the same text.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 22 insertions, 21 deletions

diff --git a/test/snapshots/wrap.golden b/test/snapshots/wrap.golden
index 8ef0ca9f..df41535b 100644
--- a/test/snapshots/wrap.golden
+++ b/test/snapshots/wrap.golden
@@ -1,7 +1,8 @@
-== snap on-narrow grid=48x15 cursor=7,3
+== snap on-narrow grid=48x15 cursor=7,4
 |Newcol Joincol Find Grep Help Changelog Tutor Du
 |   New Tty Find Grep Joincol Delcol
-|   /tmp/pardes-snap/wrap/cwd/long.txt Save Tty C
+|   /tmp/pardes-snap/wrap/cwd/long.txt Save Tty
+|   Collapse Del
 |     1 0---------1---------2---------3---------↩
 |       4---------5---------6---------7---------↩
 |       8---------9---------A---------B---------↩
@@ -11,28 +12,28 @@
 |     3 third line
 |     4
 == snap clicked grid=48x15 cursor=17,4
-== snap logical-j grid=48x15 cursor=18,8
-== snap visual-gj grid=48x15 cursor=10,4
-== snap visual-gj-again grid=48x15 cursor=10,5
-== snap visual-gk grid=48x15 cursor=10,4
-== snap visual-count-gj grid=48x15 cursor=10,6
-== snap off grid=48x15 cursor=10,6
-|3:      1 0---------1---------2---------3---- Wrap
-|4:      2 second line
-|5:      3 third line
-|6:      4
-|7:
+== snap logical-j grid=48x15 cursor=17,9
+== snap visual-gj grid=48x15 cursor=10,5
+== snap visual-gj-again grid=48x15 cursor=10,6
+== snap visual-gk grid=48x15 cursor=10,5
+== snap visual-count-gj grid=48x15 cursor=10,7
+== snap off grid=48x15 cursor=10,7
+|4:      1 0---------1---------2---------3---- Wrap
+|5:      2 second line
+|6:      3 third line
+|7:      4
 |8:
 |9:
 |10:
-== snap on-again grid=48x15 cursor=10,6
-|4:        4---------5---------6---------7---------↩
-|5:        8---------9---------A---------B---------↩
-|6:        C---------D---------E---------F---------↩
-|7:        G---------H---------I---------J---------
-|8:      2 second line
-|9:      3 third line
-|10:      4
+|11:
+== snap on-again grid=48x15 cursor=10,7
+|5:        4---------5---------6---------7---------↩
+|6:        8---------9---------A---------B---------↩
+|7:        C---------D---------E---------F---------↩
+|8:        G---------H---------I---------J---------
+|9:      2 second line
+|10:      3 third line
+|11:      4
 == snap on-wide grid=128x15 cursor=7,3
 |Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Exit
 |   New Tty Find Grep Joincol Delcol