A Rename that previews other files answers its preview pane to the 9P write that asked it, and says on the message row that it previewed and applied nothing

A multi-file Rename filled a +Search preview but the waiting exec write
answered the pane it was asked from, and nothing was said. lspResponse
now notes the pane it filled (fs.lsp_result); the write that waited for
the answer reads that pane back, as a look or an exec answers the pane
it went to, and the message row says `Rename: N edit(s) across files,
previewed, not applied`.

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

1 files changed, 12 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index b17f150a..f0dab28d 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -4105,3 +4105,15 @@ test "Tty+bash on a pane ctl is Tty with its argument, as exec and the tag take
     try testing.expectEqual(Status.ok, r.reply.status);
     try testing.expect(r.spawned);
 }
+
+test "a Rename that reaches other files previews them, says so, and is the pane a waiting write answers" {
+    const p = try withFile(testing.allocator, "x\n");
+    defer p.deinit();
+    const id = p.active;
+    p.fs.lsp_result = null;
+    p.lspRequest(id, .rename, "sum");
+    p.lspResponse(p.lsp_wait.?.id, "lib.rs:2:8 sum\nmain.rs:4:13-15 sum\n");
+    const preview = p.panes[p.panes[id].?.search_pane.?].?;
+    try testing.expectEqual(preview.serial, p.fs.lsp_result.?);
+    try testing.expect(th.logHas(p, "Rename: 2 edit(s) across files, previewed, not applied"));
+}