[Core] Speculative Hold option for mod-taps: hold mods instantly while unsettled. (#25572)

quantum/action_util.c

@@ -19,6 +19,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "debug.h"
 #include "action_util.h"
 #include "action_layer.h"
+#include "action_tapping.h"
 #include "timer.h"
 #include "keycode_config.h"
 #include <string.h>
@@ -284,6 +285,10 @@ static uint8_t get_mods_for_report(void) {
     }
 #endif
 
+#ifdef SPECULATIVE_HOLD
+    mods |= get_speculative_mods();
+#endif
+
 #ifdef KEY_OVERRIDE_ENABLE
     // These need to be last to be able to properly control key overrides
     mods &= ~suppressed_mods;