Focus on a closed pane goes to the pane that takes its place, never to the one focused before

Dogfood closed a pane in one column and focus jumped to another column, only because that pane was focused last. Now removePane decides for every route (Del, a ctl del, a command pane's end, a 9P remove, a stillborn scratch replaced): the pane that grew into the rows, or the scratch standing in an emptied column; removeColumn gives it to the pane level with it in the column that takes the width. Closing an unfocused pane leaves focus alone. The per-caller focus lines in Del and replaceStillborn are gone, and so is prevFocus.

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

1 files changed, 1 insertions, 3 deletions

diff --git a/src/exec.zig b/src/exec.zig
index bf3ed1f0..9a4e0a89 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -347,7 +347,7 @@ pub fn evictLonePristineTty(p: *Pardes, col: usize, keep_id: usize) void {
         panes.Terminal.scrollbar(tt).total > tt.rows) return;
     p.deinitPane(tt) catch |err| return p.reportError(tty_id, "close", err);
     layout.compute(p); // a just-stacked doc has no rect yet; absorb snaps to rows
-    layout.absorbVWeight(p, tty_id, null);
+    _ = layout.absorbVWeight(p, tty_id, null);
     layout.removePane(p, tty_id);
     p.panes[tty_id] = null;
     if (p.active == tty_id) p.active = keep_id;
@@ -372,10 +372,8 @@ pub fn replaceStillborn(p: *Pardes) void {
     if (out.from != .cmd or out.from.cmd != .New) return;
     if (file.revision != 0 or file.content.len != 0) return;
     if (old.tag.own) |own| if (!std.mem.eql(u8, own, tagline.defaultTail(old))) return;
-    const was_active = p.active == old_id;
     layout.compute(p); // the joiner may have no rect yet; absorb snaps to rows
     p.removePane(old_id, new_id) catch |err| return p.reportError(old_id, "close", err);
-    if (was_active) p.active = new_id;
 }
 
 // ---- REPLs ----