feat(tray): 实现 tray_init 完成 system tray selection 接管

src/backend/x11/backend.c

@@ -19,6 +19,7 @@
 
 #include "backend/output_utils.h"
 #include "backend/x11/cursor.h"
+#include "backend/x11/tray.h"
 #include "backend/x11/window.h"
 #include "base/app.h"
 #include "base/array.h"
@@ -845,6 +846,8 @@ backend_bar_window_t backend_create_bar_window(
     fatal("cannot create cairo context: %s", cairo_status_to_string(statue));
   }
 
+  if (enable_tray) tray_init(backend, window_id, width, height);
+
   return (backend_bar_window_t){
     .window_id = window_id,
     .cr = cr,