Refactor grid size calculation for improved accuracy

Switched from using np.round to np.ceil for block size calculation to ensure more accurate grid sizes. Additionally, replaced range with np.arange for consistent step intervals, and ensured rectangle positions use np.round for precise placement.

cooperative_cuisine/pygame_2d_vis/drawing.py

@@ -335,13 +335,13 @@ class Visualizer:
             height: The kitchen height.
             fixed_counter_pos: Set of counter positions.
         """
-        block_size = int(np.round(self.grid_size / 2))  # Set the size of the grid block
+        block_size = int(np.ceil(self.grid_size / 2))  # Set the size of the grid block
 
         if self.reduced_background:
-            for x_idx, x in enumerate(range(0, width, block_size)):
-                for y_idx, y in enumerate(range(0, height, block_size)):
+            for x_idx, x in enumerate(np.arange(0, width, self.grid_size / 2)):
+                for y_idx, y in enumerate(np.arange(0, height, self.grid_size / 2)):
                     if (x_idx // 2, y_idx // 2) not in fixed_counter_pos:
-                        rect = pygame.Rect(x, y, block_size, block_size)
+                        rect = pygame.Rect(np.round(x), np.round(y), block_size, block_size)
                         surface.fill(colors[self.config["Kitchen"]["ground_tiles_color"]], rect)
                         pygame.draw.rect(
                             surface,