Dev

[Aseke09]

• made on plane js, bot for single play are not implemented!
• Implemented full server-side logic for the Battleship game (players, rooms, shots, and game finish) and aligned all WebSocket messages with the protocol specification.
• Introduced a unified envelope format { type, data: string, id: 0 }, added correct handling for add_ships, attack, turn, and finish events, fixed direction interpretation to match frontend auto-placement, and implemented proper finish and update_winners broadcasting when all enemy ships are destroyed.