Add system messages to chat

main.go

@@ -225,11 +225,14 @@ func handleConnection(conn net.Conn) {
 		ProtocolVersion: protoVersion,
 	}
 
+	addSystemMessage(fmt.Sprintf("%s connected", username))
+
 	// Ensure player state is saved on any kind of disconnect
 	defer func() {
 		if err := db.SavePlayerState(playerID, player.X, player.Y); err != nil {
 			log.Printf("Error saving state for player %d: %v", playerID, err)
 		}
+		addSystemMessage(fmt.Sprintf("%s disconnected", player.Username))
 		mu.Lock()
 		delete(players, playerID)
 		delete(playerConns, playerID)
@@ -308,6 +311,23 @@ func addChatMessage(playerID int32, content string) {
 	chatHistory = append(chatHistory, msg)
 }
 
+func addSystemMessage(content string) {
+	chatMutex.Lock()
+	defer chatMutex.Unlock()
+
+	msg := &pb.ChatMessage{
+		PlayerId:  0, // System messages use ID 0
+		Username:  "System",
+		Content:   content,
+		Timestamp: time.Now().UnixNano(),
+	}
+
+	if len(chatHistory) >= 100 {
+		chatHistory = chatHistory[1:]
+	}
+	chatHistory = append(chatHistory, msg)
+}
+
 func processActions() {
 	mu.Lock()
 	defer mu.Unlock()