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, 42 insertions, 28 deletions

diff --git a/test/snapshots/layout-close.golden b/test/snapshots/layout-close.golden
index a7d159b5..74e1fc08 100644
--- a/test/snapshots/layout-close.golden
+++ b/test/snapshots/layout-close.golden
@@ -1,48 +1,62 @@
-== snap built grid=140x41 cursor=4,17
+== snap built grid=140x41 cursor=4,18
 |Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Exit
 |   New Tty Find Grep Joincol Delcol                                      New Tty Find Grep Joincol Delcol
-|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collaps   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collaps
-|  ls                                                                    ls
-|  marker.txt                                                            marker.txt
-|
-|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collaps
-|  ls
+|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collap    /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collap
+|   se Del                                                                se Del
+|  marker.txt                                                            ls
+|                                                                        marker.txt
+|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collap
+|   se Del
 |  marker.txt
 |
-|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collaps
-|  ls
+|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collap
+|   se Del
 |  marker.txt
 |
-|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collaps
+|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collap
+|   se Del
 |  ls
 |  marker.txt
 |
 |
 |
 |
-|
-|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collaps
+|   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collap
+|   se Del
 |  ls
 |  marker.txt
-== snap altc grid=140x41 cursor=39,5
+== snap altc grid=140x41 cursor=39,7
 |1:    New Tty Find Grep Joincol Delcol   New Tty Find Grep Joincol Delcol   New Tty Find Grep Joincol Delcol
-|2:    /tmp/pardes-snap/layout-close/cw   /tmp/pardes-snap/layout-close/cw   /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collaps
-|3:   ls                                 ls                                 ls
-|4:   marker.txt                         marker.txt                         marker.txt
-|6:    /tmp/pardes-snap/layout-close/cw
-|10:    /tmp/pardes-snap/layout-close/cw
+|2:    /tmp/pardes-snap/layout-close/c    /tmp/pardes-snap/layout-close/c    /tmp/pardes-snap/layout-close/cwd Tty+bash Save Mode Filter Collap
+|3:    wd Tty+bash Save Mode Filter Co    wd Tty+bash Save Mode Filter Co    se Del
+|4:    llapse Del                         llapse Del                        ls
+|5:                                      ls                                 marker.txt
+|6:    /tmp/pardes-snap/layout-close/c   marker.txt
+|7:    wd Tty+bash Save Mode Filter Co
+|8:    llapse Del
+|10:    /tmp/pardes-snap/layout-close/c
+|11:    wd Tty+bash Save Mode Filter Co
+|12:    llapse Del
+|13:   marker.txt
 |14:
 |15:
 |16:
-|22:    /tmp/pardes-snap/layout-close/cw
-== snap del grid=140x41 cursor=4,8
-|6:
-|7:
-|8:
-== snap exit grid=140x41 cursor=4,8
-|10:
+|17:
+|22:    /tmp/pardes-snap/layout-close/c
+|23:    wd Tty+bash Save Mode Filter Co
+|24:    llapse Del
+|25:   ls
+|26:   marker.txt
+== snap del grid=140x41 cursor=7,8
+|8:    l dklapse Del
+== snap exit grid=140x41 cursor=4,11
+|9:   ls
+|10:   marker.txt
 |11:
 |12:
-== snap colclose grid=140x41 cursor=42,3
-|3:   ls                                    1                               ls
-|4:   marker.txt                                                            marker.txt
+|13:
+== snap colclose grid=140x41 cursor=42,4
+|3:    wd Tty+bash Save Mode Filter Co    wd/+New Save Tty Collapse Del      se Del
+|4:    llapse Del                           1                               ls
+|5:                                                                         marker.txt
+|6:    /tmp/pardes-snap/layout-close/c