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>

ServerLobby/ServerLobbyScript.cs

@@ -247,10 +247,16 @@ namespace KCM
                             foreach (var player in Main.kCPlayers.Values)
                                 player.inst.SetupJobPriorities();
 
+                            // Send world seed with all map parameters to ensure clients generate identical world
                             new WorldSeed()
                             {
-                                Seed = World.inst.seed
+                                Seed = World.inst.seed,
+                                WorldSize = World.inst.mapSize,
+                                WorldType = World.inst.mapBias,
+                                WorldRivers = World.inst.mapRiverLakes
                             }.SendToAll(KCClient.client.Id);
+
+                            Main.helper.Log($"[WORLD SYNC] Generated new world - Seed: {World.inst.seed}, Size: {World.inst.mapSize}, Type: {World.inst.mapBias}, Rivers: {World.inst.mapRiverLakes}");
                         }
                         catch (Exception ex)
                         {