A refused Delcol changes nothing: no +Unsaved opens, no focus moves

Delcol's refusal opened +Unsaved, placing a pane in the layout it was refusing to change. Its unsaved records and notice say which panes; the list pane is left to the refusals of the other words.

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

1 files changed, 23 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index 7986333c..1ac53bb7 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -3048,3 +3048,26 @@ test "a bad command inside an Edit block written whole is named, not the } after
     try testing.expect(std.mem.indexOf(u8, r.reply.ename, "z") != null);
     try testing.expectEqualStrings("abc\n", p.panes[0].?.file.?.content);
 }
+
+test "a refused Delcol changes nothing: no pane, no focus" {
+    const p = try withFile(testing.allocator, "x\n");
+    defer p.deinit();
+    _ = wr(p, @intFromEnum(tree.TopFile.ctl), "Newcol\n");
+    const made = try th.newPane(p);
+    _ = wr(p, Node.of(made, .name), "/tmp/pardes-delcol-refused.txt\n");
+    _ = wr(p, Node.of(made, .body), "edit\n");
+    p.sync();
+    const col = layout.findPane(p, p.paneBySerial(made).?).?.col;
+    const active = p.active;
+    const active_column = p.active_column;
+    var count: usize = 0;
+    for (p.panes) |slot| count += @intFromBool(slot != null);
+    try testing.expectEqual(Status.err, wr(p, Node.ofCol(layout.columnSerial(p, col), .ctl), "Delcol\n").reply.status);
+    p.sync();
+    var after: usize = 0;
+    for (p.panes) |slot| after += @intFromBool(slot != null);
+    try testing.expectEqual(count, after);
+    try testing.expectEqual(active, p.active);
+    try testing.expectEqual(active_column, p.active_column);
+    try testing.expect(th.logHas(p, "unsaved "));
+}