Enhance blood stain mechanics: add dynamic blood surface generation and integrate blood stains into game rendering

units/unit.py

@@ -64,7 +64,7 @@ class Unit(ABC):
         """Handle collisions with other units. Default implementation does nothing."""
         pass
 
-    def die(self):
+    def die(self, score=None):
         """Remove unit from game and handle basic cleanup."""
         if self.id in self.game.units:
             self.game.units.pop(self.id)