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, 20 insertions, 23 deletions

diff --git a/test/snapshots/scroll.golden b/test/snapshots/scroll.golden
index 5960bdc5..2ecc9e5b 100644
--- a/test/snapshots/scroll.golden
+++ b/test/snapshots/scroll.golden
@@ -2,9 +2,9 @@
 |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/scroll/cwd Tty+bash Save Mode    /tmp/pardes-snap/scroll/cwd Tty+bash Save Mode
-|  188                                               ls
-|  189                                               s.txt
-|  190
+|    Filter Collapse Del                               Filter Collapse Del
+|  189                                               ls
+|  190                                               s.txt
 |  191
 |  192
 |  193
@@ -17,12 +17,12 @@
 |  200
 |
 |   /tmp/pardes-snap/scroll/cwd Tty+bash Save Mode
+|    Filter Collapse Del
 |  ls
 |  s.txt
 == snap wheel3 grid=100x31 cursor=4,16
-|3:   185                                               ls
-|4:   186                                               s.txt
-|5:   187
+|4:   186                                               ls
+|5:   187                                               s.txt
 |6:   188
 |7:   189
 |8:   190
@@ -35,9 +35,8 @@
 |15:   197
 |16:   198
 == snap gutter-up grid=100x31 cursor=4,16
-|3:   178                                               ls
-|4:   179                                               s.txt
-|5:   180
+|4:   179                                               ls
+|5:   180                                               s.txt
 |6:   181
 |7:   182
 |8:   183
@@ -50,9 +49,8 @@
 |15:   190
 |16:   191
 == snap gutter-down grid=100x31 cursor=4,16
-|3:   180                                               ls
-|4:   181                                               s.txt
-|5:   182
+|4:   181                                               ls
+|5:   182                                               s.txt
 |6:   183
 |7:   184
 |8:   185
@@ -65,9 +63,8 @@
 |15:   192
 |16:   193
 == snap wheel-down grid=100x31 cursor=4,16
-|3:   181                                               ls
-|4:   182                                               s.txt
-|5:   183
+|4:   182                                               ls
+|5:   183                                               s.txt
 |6:   184
 |7:   185
 |8:   186
@@ -82,11 +79,11 @@
 == style wheel-down grid=100x31
 |0: 0-70 #b2c3b8,#1d2824, 71-99 d,#1d2824,
 |1: 0-1 #ffffff,#887455, 2-2 d,#26362d, 3-34 #becfc4,#26362d, 35-49 d,#26362d, 50-51 #ffffff,#887455, 52-52 d,#1d2824, 53-84 #b2c3b8,#1d2824, 85-99 d,#1d2824,
-|2: 0-1 #000000,#add38a, 2-2 d,#26362d, 3-30 #becfc4,#26362d, 31-38 #dfbce5,#26362d, 39-49 #becfc4,#26362d, 50-51 #ffffff,#496656, 52-52 d,#1d2824, 53-80 #b2c3b8,#1d2824, 81-88 #d3b0d9,#1d2824, 89-99 #b2c3b8,#1d2824,
-|3: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
+|2: 0-1 #000000,#add38a, 2-2 d,#26362d, 3-30 #becfc4,#26362d, 31-38 #dfbce5,#26362d, 39-48 #becfc4,#26362d, 49-49 d,#26362d, 50-51 #ffffff,#496656, 52-52 d,#1d2824, 53-80 #b2c3b8,#1d2824, 81-88 #d3b0d9,#1d2824, 89-98 #b2c3b8,#1d2824, 99-99 d,#1d2824,
+|3: 0-1 #000000,#add38a, 2-2 d,#26362d, 3-22 #becfc4,#26362d, 23-49 d,#26362d, 50-51 #ffffff,#496656, 52-52 d,#1d2824, 53-72 #b2c3b8,#1d2824, 73-99 d,#1d2824,
 |4: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
-|5: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-99 d,#0d1410,
-|6: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
+|5: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
+|6: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-99 d,#0d1410,
 |7: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |8: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |9: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
@@ -97,11 +94,11 @@
 |14: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |15: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |16: 0-0 d,#152019, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
-|17: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-30 #b2c3b8,#1d2824, 31-38 #d3b0d9,#1d2824, 39-49 #b2c3b8,#1d2824, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
-|18: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
+|17: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-30 #b2c3b8,#1d2824, 31-38 #d3b0d9,#1d2824, 39-48 #b2c3b8,#1d2824, 49-49 d,#1d2824, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
+|18: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-22 #b2c3b8,#1d2824, 23-49 d,#1d2824, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |19: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
-|20: 0-0 d,#608269, 1-49 d,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
-|21: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
+|20: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
+|21: 0-0 d,#608269, 1-49 d,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |22: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |23: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,
 |24: 0-0 d,#608269, 1-1 d,#0d1410, 2-49 #e5eee5,#0d1410, 50-50 d,#608269, 51-51 d,#0d1410, 52-99 #e5eee5,#0d1410,