Fix map synchronization between host and clients

Problem: Clients received WorldSeed packet before ServerSettings,
causing world generation with wrong mapSize/mapBias/mapRivers
parameters. Same seed but different parameters = different maps.

Solution: Include all map parameters directly in WorldSeed packet:
- WorldSize (map size)
- WorldType (map bias - continents/islands/etc)
- WorldRivers (river/lake density)

Now packet order doesn't matter - WorldSeed has everything needed
for identical world generation across all clients.

Changes:
- WorldSeed.cs: Add map parameters, set before Generate()
- ClientConnected.cs: Send full world params to joining clients
- ServerLobbyScript.cs: Send full params on new world generation
- Added [WORLD SYNC] debug logging

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Packets/Lobby/WorldSeed.cs

@@ -13,6 +13,11 @@ namespace KCM.Packets.Lobby
         public override ushort packetId => (int)Enums.Packets.WorldSeed;
         public int Seed { get; set; }
 
+        // Map parameters to ensure correct generation
+        public World.MapSize WorldSize { get; set; }
+        public World.MapBias WorldType { get; set; }
+        public World.MapRiverLakes WorldRivers { get; set; }
+
         public override void HandlePacketServer()
         {
             //SetWorldSeed();
@@ -27,12 +32,21 @@ namespace KCM.Packets.Lobby
         {
             try
             {
+                // Set map parameters BEFORE generating to ensure correct world
+                World.inst.mapSize = WorldSize;
+                World.inst.mapBias = WorldType;
+                World.inst.mapRiverLakes = WorldRivers;
+
+                Main.helper.Log($"[WORLD SYNC] Generating world - Seed: {Seed}, Size: {WorldSize}, Type: {WorldType}, Rivers: {WorldRivers}");
+
                 foreach (var player in Main.kCPlayers.Values)
                     player.inst.Reset();
 
                 World.inst.Generate(Seed);
                 Vector3 center = World.inst.GetCellData(World.inst.GridWidth / 2, World.inst.GridHeight / 2).Center;
                 Cam.inst.SetTrackingPos(center);
+
+                Main.helper.Log("[WORLD SYNC] World generation complete");
             }
             catch (Exception e)
             {