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, 39 insertions, 34 deletions

diff --git a/test/snapshots/lookpanes.golden b/test/snapshots/lookpanes.golden
index bfaf1d04..096baa13 100644
--- a/test/snapshots/lookpanes.golden
+++ b/test/snapshots/lookpanes.golden
@@ -1,56 +1,61 @@
 == snap shells grid=130x51 cursor=122,4
 |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/lookpanes/cwd/beta/bmark.txt Save Tty Collaps   /tmp/pardes-snap/lookpanes/cwd Tty+bash Save Mode Filter Colla
-|     1 both.txt                                                    ls
-|     2 b-marker                                                    alpha  beta  zzboot.txt    zqonly.txt pick.txt twin.txt
-|
-|                                                                    /tmp/pardes-snap/lookpanes/cwd/alpha Tty+bash Save Mode Filter
+|   /tmp/pardes-snap/lookpanes/cwd/beta/bmark.txt Save Tty Collap    /tmp/pardes-snap/lookpanes/cwd Tty+bash Save Mode Filter Coll
+|   se Del                                                           apse Del
+|     1 both.txt                                                    alpha  beta  zzboot.txt    zqonly.txt pick.txt twin.txt
+|     2 b-marker
+|                                                                    /tmp/pardes-snap/lookpanes/cwd/alpha Tty+bash Save Mode Filte
+|                                                                    r Collapse Del
 |                                                                   ls
 |                                                                   amark.txt  both.txt  pick.txt  twin.txt  zqonly.txt
-== snap other-dir grid=130x51 cursor=7,28
-|27:    /tmp/pardes-snap/lookpanes/cwd/alpha/zqonly.txt Save Tty Colla
-|28:      1 ONLY-IN-ALPHA
-== snap clicked-wins grid=130x51 cursor=7,16
-|15:    /tmp/pardes-snap/lookpanes/cwd/beta/both.txt Save Tty Collapse
-|16:      1 BOTH-FROM-BETA
-== snap mru-alpha grid=130x51 cursor=7,22
-|21:    /tmp/pardes-snap/lookpanes/cwd/alpha/pick.txt Save Tty Collaps
-|22:      1 PICK-FROM-ALPHA
-== snap mru-beta grid=130x51 cursor=7,10
-|9:    /tmp/pardes-snap/lookpanes/cwd/beta/twin.txt Save Tty Collapse
-|10:      1 TWIN-FROM-BETA
+== snap other-dir grid=130x51 cursor=7,29
+|27:    /tmp/pardes-snap/lookpanes/cwd/alpha/zqonly.txt Save Tty Coll
+|28:    apse Del
+|29:      1 ONLY-IN-ALPHA
+== snap clicked-wins grid=130x51 cursor=7,17
+|15:    /tmp/pardes-snap/lookpanes/cwd/beta/both.txt Save Tty Collaps
+|16:    e Del
+|17:      1 BOTH-FROM-BETA
+== snap mru-alpha grid=130x51 cursor=7,23
+|21:    /tmp/pardes-snap/lookpanes/cwd/alpha/pick.txt Save Tty Collap
+|22:    se Del
+|23:      1 PICK-FROM-ALPHA
+== snap mru-beta grid=130x51 cursor=7,11
+|9:    /tmp/pardes-snap/lookpanes/cwd/beta/twin.txt Save Tty Collaps   amark.txt  both.txt  pick.txt  twin.txt  zqonly.txt
+|10:    e Del
+|11:      1 TWIN-FROM-BETA
 == style mru-beta grid=130x51
 |0: 0-70 #b2c3b8,#1d2824, 71-129 d,#1d2824,
 |1: 0-1 #ffffff,#887455, 2-2 d,#26362d, 3-34 #becfc4,#26362d, 35-64 d,#26362d, 65-66 #ffffff,#887455, 67-67 d,#1d2824, 68-99 #b2c3b8,#1d2824, 100-129 d,#1d2824,
-|2: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-38 #b2c3b8,#1d2824, 39-47 #d3b0d9,#1d2824, 48-64 #b2c3b8,#1d2824, 65-66 #ffffff,#496656, 67-67 d,#1d2824, 68-98 #b2c3b8,#1d2824, 99-106 #d3b0d9,#1d2824, 107-129 #b2c3b8,#1d2824,
-|3: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-14 #e5eee5,#0d1410, 15-64 d,#0d1410, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
+|2: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-38 #b2c3b8,#1d2824, 39-47 #d3b0d9,#1d2824, 48-63 #b2c3b8,#1d2824, 64-64 d,#1d2824, 65-66 #ffffff,#496656, 67-67 d,#1d2824, 68-98 #b2c3b8,#1d2824, 99-106 #d3b0d9,#1d2824, 107-128 #b2c3b8,#1d2824, 129-129 d,#1d2824,
+|3: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-8 #b2c3b8,#1d2824, 9-64 d,#1d2824, 65-66 #ffffff,#496656, 67-67 d,#1d2824, 68-75 #b2c3b8,#1d2824, 76-129 d,#1d2824,
 |4: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-14 #e5eee5,#0d1410, 15-64 d,#0d1410, 65-65 d,#608269, 66-66 d,#0d1410, 67-121 #e5eee5,#0d1410, 122-129 d,#0d1410,
-|5: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-64 d,#0d1410, 65-65 d,#608269, 66-129 d,#0d1410,
-|6: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-64 d,#0d1410, 65-66 #ffffff,#496656, 67-67 d,#1d2824, 68-104 #b2c3b8,#1d2824, 105-112 #d3b0d9,#1d2824, 113-129 #b2c3b8,#1d2824,
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+|5: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-14 #e5eee5,#0d1410, 15-64 d,#0d1410, 65-65 d,#152019, 66-129 d,#0d1410,
+|6: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-64 d,#0d1410, 65-66 #ffffff,#496656, 67-67 d,#1d2824, 68-104 #b2c3b8,#1d2824, 105-112 #d3b0d9,#1d2824, 113-128 #b2c3b8,#1d2824, 129-129 d,#1d2824,
+|7: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-64 d,#0d1410, 65-66 #ffffff,#496656, 67-67 d,#1d2824, 68-81 #b2c3b8,#1d2824, 82-129 d,#1d2824,
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+|9: 0-1 #000000,#add38a, 2-2 d,#26362d, 3-38 #becfc4,#26362d, 39-46 #dfbce5,#26362d, 47-63 #becfc4,#26362d, 64-64 d,#26362d, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
+|10: 0-1 #000000,#add38a, 2-2 d,#26362d, 3-7 #becfc4,#26362d, 8-64 d,#26362d, 65-65 d,#608269, 66-129 d,#0d1410,
+|11: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #616f64,#0d1410,b 7-20 #e5eee5,#0d1410, 21-64 d,#0d1410, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
 |12: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-64 d,#0d1410, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
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-|15: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-38 #b2c3b8,#1d2824, 39-46 #d3b0d9,#1d2824, 47-64 #b2c3b8,#1d2824, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
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+|15: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-38 #b2c3b8,#1d2824, 39-46 #d3b0d9,#1d2824, 47-63 #b2c3b8,#1d2824, 64-64 d,#1d2824, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
+|16: 0-1 #ffffff,#496656, 2-2 d,#1d2824, 3-7 #b2c3b8,#1d2824, 8-64 d,#1d2824, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
+|17: 0-0 d,#608269, 1-1 d,#0d1410, 2-6 #59675c,#0d1410, 7-20 #e5eee5,#0d1410, 21-64 d,#0d1410, 65-65 d,#608269, 66-66 d,#0d1410, 67-129 #e5eee5,#0d1410,
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