Quit on window close when the app has no event callback

Without yasl_app_desc.event, a close request had nowhere to go and the
window stayed open. The runner now stops instead, so hello drops its
event callback.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/common/app.c b/src/common/app.c
index 9d52e4a..435d020 100644
--- a/src/common/app.c
+++ b/src/common/app.c
@@ -111,8 +111,13 @@ static void app_runner_surface_close(struct yasl_surface *s, void *ud)
 {
     struct app_surface *as = ud;
     struct app_runner *ar = as ? as->runner : NULL;
-    if (!ar || !ar->desc || !ar->desc->event)
+    if (!ar || !ar->desc)
+        return;
+    /* Without an event callback nothing could answer the request, so quit. */
+    if (!ar->desc->event) {
+        ar->running = false;
         return;
+    }
 
     emit(ar, &(struct yasl_event){
         .type = YASL_EVENT_WINDOW_CLOSE,