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, 34 insertions, 37 deletions

diff --git a/test/snapshots/tagnav.golden b/test/snapshots/tagnav.golden
index 929ae828..34406083 100644
--- a/test/snapshots/tagnav.golden
+++ b/test/snapshots/tagnav.golden
@@ -1,7 +1,8 @@
-== snap start grid=100x31 cursor=7,3
+== snap start grid=100x31 cursor=7,4
 |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/tagnav/cwd/w.txt Save Tty Coll   /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
+|   /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Col    /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
+|   lapse Del                                          Filter Collapse Del
 |     1 alpha                                        ls
 |     2 beta                                         w.txt
 |     3 gamma
@@ -15,51 +16,47 @@
 |
 |
 |
-|
 |   /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
+|    Filter Collapse Del
 |  ls                                           Up
 |  w.txt
-== snap colon grid=100x31 cursor=28,2
-|2:    es-snap/tagnav/cwd/w.txt Save Tty Collapse Del    /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
-|18:   ls
-== snap word grid=100x31 cursor=32,2
-== snap in-tag grid=100x31 cursor=34,2
-== snap right grid=100x31 cursor=54,5
-|2:    /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Coll   /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
-|3:      1 alpha                                Right   ls
-== snap right-tag grid=100x31 cursor=70,2
-|2:    /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Coll   nav/cwd Tty+bash Save Mode Filter Collapse Del
-|3:      1 alpha                                        ls
+== snap colon grid=100x31 cursor=37,2
+|19:   ls
+== snap word grid=100x31 cursor=41,2
+== snap in-tag grid=100x31 cursor=43,2
+== snap right grid=100x31 cursor=54,6
+|4:      1 alpha                                Right   ls
+== snap right-tag grid=100x31 cursor=90,2
+|4:      1 alpha                                        ls
 == snap left-tag grid=100x31 cursor=43,2
-|2:    /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Coll   /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
-== snap back-to-body grid=100x31 cursor=7,3
-== snap tty-on grid=100x31 cursor=54,5
-|2:    /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Coll$  /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
-|3:      1 alpha                                        $ ls
-|5:      3 gamma                                        $
+== snap back-to-body grid=100x31 cursor=7,4
+== snap tty-on grid=100x31 cursor=54,6
+|2:    /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Col $  /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
+|4:      1 alpha                                        $ ls
+|6:      3 gamma                                        $
 == snap tty-tag grid=100x31 cursor=95,2
-== snap tty-restored grid=100x31 cursor=54,5
+== snap tty-restored grid=100x31 cursor=54,6
 == snap column-tag grid=100x31 cursor=3,1
-|2:    /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Coll   /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
-|3:      1 alpha                                   Up   ls
-|5:      3 gamma
+|2:    /tmp/pardes-snap/tagnav/cwd/w.txt Save Tty Col    /tmp/pardes-snap/tagnav/cwd Tty+bash Save Mode
+|4:      1 alpha                                   Up   ls
+|6:      3 gamma
 == snap column-word grid=100x31 cursor=6,1
-|3:      1 alpha                                        ls
+|4:      1 alpha                                        ls
 == snap workspace-tag grid=100x31 cursor=0,0
-|3:      1 alpha                                   Up   ls
+|4:      1 alpha                                   Up   ls
 == snap topbar-dollar grid=100x31 cursor=70,0
-|3:      1 alpha                                        ls
+|4:      1 alpha                                        ls
 == snap topbar-dump-word grid=100x31 cursor=46,0
-== snap topbar-exec grid=100x31 cursor=7,3
+== snap topbar-exec grid=100x31 cursor=7,4
 |0: Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Exit Restore /tmp/pardes-snap/tag
-|3:      1 alpha                                 Dump   ls
+|4:      1 alpha                                 Dump   ls
 == snap topbar-restore-word grid=100x31 cursor=72,0
-|3:      1 alpha                                        ls
-== snap topbar-restored grid=100x31 cursor=7,3
+|4:      1 alpha                                        ls
+== snap topbar-restored grid=100x31 cursor=7,4
 |0: Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Exit
-|3:      1 alpha                                        $ ls
-|5:      3 gamma                                        $
-|6:                                                     ── restored history ──
-|18:   $ ls
-|20:   $
-|21:   ── restored history ──
+|4:      1 alpha                                        $ ls
+|6:      3 gamma                                        $
+|7:                                                     ── restored history ──
+|19:   $ ls
+|21:   $
+|22:   ── restored history ──