Fixed a bug with night to day transition.

src/time_system.nvgt

@@ -445,6 +445,14 @@ void update_time() {
         check_invasion_status();
 
         check_ambience_transition();
+        // Safety: if crossfade failed or was skipped, align day/night with the current hour.
+        if (!crossfade_active) {
+            bool expected_daytime = (current_hour >= 6 && current_hour < 19);
+            if (expected_daytime != is_daytime) {
+                is_daytime = expected_daytime;
+                update_ambience(true);
+            }
+        }
 
         if (is_daytime && residents_count > 0 && barricade_health < BARRICADE_MAX_HEALTH && current_hour % 4 == 0) {
             if (has_any_storage_food()) {
@@ -578,22 +586,26 @@ void update_crossfade() {
     if (crossfade_to_night) {
         if (day_sound_handle == -1 || !p.sound_is_active(day_sound_handle)) {
             crossfade_active = false;
+            is_daytime = false;
             update_ambience(true);
             return;
         }
         if (night_sound_handle == -1 || !p.sound_is_active(night_sound_handle)) {
             crossfade_active = false;
+            is_daytime = false;
             update_ambience(true);
             return;
         }
     } else {
         if (night_sound_handle == -1 || !p.sound_is_active(night_sound_handle)) {
             crossfade_active = false;
+            is_daytime = true;
             update_ambience(true);
             return;
         }
         if (day_sound_handle == -1 || !p.sound_is_active(day_sound_handle)) {
             crossfade_active = false;
+            is_daytime = true;
             update_ambience(true);
             return;
         }