feat: Introduce special tile power-up system, managing inventory, levels, cooldowns, and targeted effects like area freeze and block floor.

scripts/static_tekton_controller.gd

@@ -107,6 +107,11 @@ func _find_empty_tile() -> Vector2i:
 			# Check range logic (Euclidean or Manhattan?)
 			if Vector2(x, y).distance_to(Vector2(center.x, center.y)) > throw_range: continue
 			
+			# EXPLICITLY EXCLUDE 3x3 BASE AREA (Tekton Stand)
+			# The stand occupies [center-1, center+1]. We must NOT spawn here.
+			if abs(x - center.x) <= 1 and abs(y - center.y) <= 1:
+				continue
+			
 			# Check if empty (Layer 1 has no item)
 			if enhanced_gridmap.get_cell_item(Vector3i(x, 1, y)) == -1:
 				# Also check floor exist? (Layer 0)