Make a pane's tag a Text edited with the body's own keys

The tag was a fixed buffer with its own one-line editor, a cursor measured
across the path, and a hijack of the body's mode while it was typed into.
It is now the pane's second Text: its own characters after the computed
prefix (path, dirty marker, PDF page), which is never stored in it, so a
rename or a dirty marker never moves its cursor. Normal and insert mode are
the body's, undo included; `:` moves the keyboard between body and tag, the
tag remembers its cursor and starts on Save, and executing a word from it
hands the keyboard back. The mouse still sees the prefix: a sweep selects
across it and a click on the path drafts a new name.

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

1 files changed, 13 insertions, 7 deletions

diff --git a/test/snapshots/tag.snap b/test/snapshots/tag.snap
index a545ff9f..4faf6062 100644
--- a/test/snapshots/tag.snap
+++ b/test/snapshots/tag.snap
@@ -1,7 +1,8 @@
-# a CLICKED tag is insert mode: type straight in (no 'i'; `:` is the normal-
-# mode door, see tagcmd); backspace edits; Esc leaves back to the body; Enter
-# looks the word at the cursor (Tab executes it). Multi-word execution from
-# the tag stays the mouse's job (middle-drag), like anywhere else.
+# a CLICKED tag is typed straight into (no 'i'; `:` is the normal-mode door,
+# see tagcmd); backspace edits; Esc drops to the tag's normal mode, which is
+# the body's normal mode, and `:` there hands the keyboard back to the body;
+# Enter looks the word at the cursor (Tab executes it). Multi-word execution
+# from the tag stays the mouse's job (middle-drag), like anywhere else.
 file t.txt ZZLOOKED
 start 31 150 -n 3
 wait 8000 t.txt
@@ -29,16 +30,21 @@ snap tag-del
 send .txt
 stable 600 8000
 stable 400 5000
-# Esc: out of the tag, body back in normal mode, typed tail stays as text
+# Esc: the tag's normal mode; `:` then gives the keyboard back to the body,
+# which is in normal mode, and the typed text stays
 key esc
 settle 100
+key :
 stable 400 5000
 snap tag-exit
-# re-enter the tag and look the typed word: Enter opens t.txt as a file pane.
-# Click the inserted word itself; filename, separator and commands are compact.
+# re-enter the tag and look the typed word: Enter in normal mode opens t.txt
+# as a file pane. Click the inserted word itself; filename, separator and
+# commands are compact.
 press left @t.txt 3
 release left @t.txt 3
 stable 400 5000
+key esc
+settle 100
 key enter
 wait 10000 ZZLOOKED
 stable 700 15000