A focus moved over 9P tells the programs that asked for focus reports, as a click does

A program that set DECSET 1004 heard `CSI O` and `CSI I` when the keyboard
moved by a click, a key or the window's focus, because update() checks
after each event. A /focus write went through serveFs, which never did,
so the program kept believing it had focus until the next input event.
serveFs now runs the same check once a request has settled.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/src/pardes.zig b/src/pardes.zig
index 402b3cd8..3a6e154a 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -5733,6 +5733,9 @@ pub const Pardes = struct {
         // the end of whatever the editor does next.
         p.sync();
         p.fsReport();
+        // A /focus write moves the keyboard as a click does: the programs
+        // that asked (DECSET 1004) hear it now, as after update().
+        p.reportFocus();
         ctlfs.events.announce(p);
         return reply;
     }