feat: Implement core player character logic, including state management, network synchronization, character selection, and manager initialization.

scripts/managers/playerboard_manager.gd

@@ -34,6 +34,9 @@ func grab_item(grid_position: Vector2i) -> bool:
 	if not enhanced_gridmap or not has_ap:
 		return false
 
+	if player.get("is_frozen"):
+		return false
+
 	var cell = Vector3i(grid_position.x, 1, grid_position.y)
 	var item = enhanced_gridmap.get_cell_item(cell)
 
@@ -319,7 +322,7 @@ func auto_put_item() -> bool:
 	# Check AP only if in turn-based mode
 	var has_ap = player.action_points > 0 if TurnManager.turn_based_mode else true
 	
-	if not enhanced_gridmap or not has_ap or player.is_bot or player.is_in_group("Bots"):
+	if not enhanced_gridmap or not has_ap or player.is_bot or player.is_in_group("Bots") or player.get("is_frozen"):
 		return false
 
 	# Step 1: Find empty adjacent (or current) grid cells