Give prompts their own line to type into instead of the tag's tail

A search, pipe or Save prompt wrote its marker and answer onto the end of
the tag, so the tag's cursor, its selection, its 9P writes and a prompt
abandoned by a click all shared one buffer: the abandoned text stayed in
the tag and a 9P write landed inside the prompt. The answer is now its own
Text on the pane, typed in insert mode and shown on the notice band where
it was already drawn, and the tag never holds any of it.

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

4 files changed, 7 insertions, 8 deletions

diff --git a/test/snapshots/find.golden b/test/snapshots/find.golden
index 12dac242..b6b7b322 100644
--- a/test/snapshots/find.golden
+++ b/test/snapshots/find.golden
@@ -81,7 +81,6 @@
 |4:
 |30:      1 gamma body                                                                                                  Last
 == snap nomatch grid=120x41 cursor=7,39
-|2:    /tmp/pardes-snap/find/cwd/here.txt Save Tty Collapse Del Find /
 |3:      1 Find
 |18:    /tmp/pardes-snap/find/cwd/+Search Save Tty Collapse Del
 |19:      1
diff --git a/test/snapshots/find.snap b/test/snapshots/find.snap
index fbd585f7..fe1ecad3 100644
--- a/test/snapshots/find.snap
+++ b/test/snapshots/find.snap
@@ -64,7 +64,8 @@ key enter
 stable 700 15000
 snap back
 # executing the WORD Find (middle-click in a body) arms the same input — the
-# enum IS the dispatch — and Esc abandons it, restoring the tag tail
+# enum IS the dispatch — and Esc abandons it. The input is its own line, so an
+# abandoned one leaves nothing behind in the tag
 press middle 8 4
 release middle 8 4
 stable 700 10000
diff --git a/test/snapshots/tagbottomshort.golden b/test/snapshots/tagbottomshort.golden
index a5d53fe2..c11fe4ac 100644
--- a/test/snapshots/tagbottomshort.golden
+++ b/test/snapshots/tagbottomshort.golden
@@ -21,7 +21,7 @@
 |   New Tty Find Grep Joincol Delcol
 |     1 one                                                                  /ZZ
 |   /tmp/pardes-snap/tagbottomshort/cwd/s.txt Save Tty Collapse Del
-== snap tag-only grid=80x2 cursor=70,1
+== snap tag-only grid=80x2 cursor=79,1
 |Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
 |   /tmp/pardes-snap/tagbottomshort/cwd/s.txt Save Tty Collapse Del
 == snap regrown grid=80x11 cursor=79,2
diff --git a/test/snapshots/tagbottomshort.snap b/test/snapshots/tagbottomshort.snap
index 2574df36..58da6a87 100644
--- a/test/snapshots/tagbottomshort.snap
+++ b/test/snapshots/tagbottomshort.snap
@@ -10,8 +10,8 @@ wait 8000 s.txt
 stable 700 20000
 key space t b
 stable 700 15000
-# `/` with room to spare: the prompt is cut off the tagline (grid 9) and drawn
-# on grid 8, the last body row, with the cursor.
+# `/` with room to spare: the prompt is its own line, drawn on grid 8, the last
+# body row, with the cursor; the tagline (grid 9) never holds any of it.
 key /
 send ZZ
 stable 600 8000
@@ -27,9 +27,8 @@ resize 4 80
 stable 700 10000
 snap one-body
 # the tagline alone. No body row, so nothing of the prompt is drawn anywhere —
-# not over the tag, not on the row above the pane. The tagline itself is
-# untouched: the marker sits after the builtins, so cutting the tail there
-# leaves every column of it exactly as `tag-only` would look unarmed.
+# not over the tag, not on the row above the pane, and its caret with it. The
+# tagline itself is untouched, exactly as `tag-only` would look unarmed.
 resize 2 80
 stable 700 10000
 snap tag-only