Fewer hitches: regular save-game pull only when something changed since the last save (saving freezes the game briefly), default interval 10 min

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

WorldState.cs

@@ -40,6 +40,12 @@ public sealed class WorldState
     public const int MaxDestroyed = 5000;
 
     public bool Dirty { get; private set; }
+    /// <summary>
+    /// Änderungen, die im Spielstand landen (Aktionen, Fahrzeugwerte, Geld, Türen, Käufe ...) seit dem letzten hochgeladenen
+    /// Spielstand. 0 = der regelmäßige Spielstand-Abruf kann ausfallen (Speichern lässt das Spiel kurz hängen).
+    /// </summary>
+    [System.Text.Json.Serialization.JsonIgnore]
+    public int ChangesSinceSave { get; set; } = 1;
 
     static readonly JsonSerializerOptions Options = new() { WriteIndented = false };
 
@@ -64,6 +70,7 @@ public sealed class WorldState
     /// </summary>
     public void ResetForNewSave()
     {
+        ChangesSinceSave = 0;
         Objects.Clear();
         Events.Clear();
         MoneyDelta = 0f;
@@ -141,6 +148,7 @@ public sealed class WorldState
 
     public void ApplyMoney(byte[] payload)
     {
+        ChangesSinceSave++;
         if (payload.Length < 4) return;
         MoneyDelta += BitConverter.ToSingle(payload, 0);
         Dirty = true;
@@ -148,6 +156,7 @@ public sealed class WorldState
 
     public void ApplyDoor(byte[] payload)
     {
+        ChangesSinceSave++;
         using var r = new BinaryReader(new MemoryStream(payload));
         string key = r.ReadString();
         Doors[key] = r.ReadString();
@@ -156,6 +165,7 @@ public sealed class WorldState
 
     public void ApplyVars(byte[] payload)
     {
+        ChangesSinceSave++;
         using var r = new BinaryReader(new MemoryStream(payload));
         int count = r.ReadInt32();
         if (count < 0 || count > 10000) return;
@@ -187,6 +197,7 @@ public sealed class WorldState
 
     public void AddAppeared(byte[] payload)
     {
+        ChangesSinceSave++;
         if (Appeared.Count >= MaxAppeared) return;
         Appeared.Add(Convert.ToBase64String(payload));
         Dirty = true;
@@ -194,6 +205,7 @@ public sealed class WorldState
 
     public void AddDestroyed(int id)
     {
+        ChangesSinceSave++;
         if (Destroyed.Count >= MaxDestroyed || Destroyed.Contains(id)) return;
         Destroyed.Add(id);
         Objects.Remove(id);
@@ -203,6 +215,7 @@ public sealed class WorldState
     public void AddFsmEvent(byte[] payload)
     {
         if (Events.Count >= MaxEvents) return;
+        ChangesSinceSave++;
         Events.Add(Convert.ToBase64String(payload));
         Dirty = true;
     }