Reconnect to a restarted Wayland compositor

Windows now outlive the compositor. On connection loss YASL sends
DISPLAY_LOST instead of closing every window, retries the connection on
a loop timer, rebuilds each toplevel with its title, size, state and GL
context, and sends DISPLAY_RESTORED. CPU windows keep their pixels;
GPU renderers drop Vulkan surfaces and GL objects on loss and rebuild
them on restore.

- Free the dead connection's objects on the next wait, after the
  application has released GPU objects built on them.
- Report a lost connection as an event rather than a failed wait.
- Refuse window and Vulkan surface creation while offline with the new
  YASL_ERROR_DISCONNECTED.
- Close popups, cancel drags and fail pending clipboard requests on loss.
- Print only protocol errors, not ordinary disconnects.
- Examples survive a restart; game.c rebinds its GL context.
- Add an end-to-end test that kills Weston under CPU, GL and Vulkan
  windows and requires them to recover.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/tablet.c b/examples/tablet.c
index dad4b30..176a82b 100644
--- a/examples/tablet.c
+++ b/examples/tablet.c
@@ -55,7 +55,7 @@ int main(int argc, char **argv)
     yasl_event e;
     for (;;) {
         int n = yasl_wait_event(&e, smoke ? 20 : -1);
-        if (n < 0 || e.type == YASL_EVENT_DISPLAY_LOST) break;
+        if (n < 0) break;
         if (smoke && frames && n == 0) { result = 0; break; }
         bool escape = e.type == YASL_EVENT_KEY && e.key.action == YASL_KEY_PRESS && e.key.key == YASL_KEY_ESCAPE;
         if (e.type == YASL_EVENT_CLOSE || e.type == YASL_EVENT_QUIT || escape) { result = 0; break; }