add offline mode for solo play with local game state simulation

cmd/client/main.go

@@ -73,6 +73,7 @@ type Game struct {
 	roomID      string
 	activeField string // "name" oder "room" oder "teamname"
 	gameMode    string // "solo" oder "coop"
+	isOffline   bool   // Läuft das Spiel lokal ohne Server?
 	isHost      bool
 	teamName    string // Team-Name für Coop beim Game Over
 
@@ -351,15 +352,13 @@ func (g *Game) updateMenu() {
 	btnY := ScreenHeight/2 - 20
 
 	if isHit(soloX, btnY, btnW, btnH) {
-		// SOLO MODE
+		// SOLO MODE (Offline by default)
 		if g.playerName == "" {
 			g.playerName = "Player"
 		}
 		g.gameMode = "solo"
-		g.roomID = fmt.Sprintf("solo_%d", time.Now().UnixNano())
 		g.isHost = true
-		g.appState = StateGame
-		go g.connectAndStart()
+		g.startOfflineGame()
 	} else if isHit(coopX, btnY, btnW, btnH) {
 		// CO-OP MODE
 		if g.playerName == "" {
@@ -926,6 +925,10 @@ func (g *Game) SendCommand(cmdType string) {
 
 func (g *Game) SendInputWithSequence(input InputState) {
 	if !g.connected {
+		// Im Offline-Modus den Jump-Sound trotzdem lokal abspielen
+		if input.Jump && g.isOffline {
+			g.audio.PlayJump()
+		}
 		return
 	}