Sort running games by creation date in lobby

Add created_timestamp_millis field through the full stack (internal
storage proto, API proto, Scala server, C# client) so lobby games
display in consistent chronological order. Games with no timestamp
(existing games) sort first, with game ID as tiebreaker.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/csharp/net/eagle0/clients/unity/eagle0/Assets/ConnectionHandler/ConnectionHandler.cs

@@ -705,7 +705,9 @@ public class ConnectionHandler : MonoBehaviour, ILobbySubscriber, IDisposable {
 
             // Set up running games table
             foreach (Transform row in runningGamesListArea.transform) { Destroy(row.gameObject); }
-            foreach (var runningGame in lobbyResponse.RunningGames) {
+            foreach (var runningGame in lobbyResponse.RunningGames
+                             .OrderBy(g => g.CreatedTimestampMillis)
+                             .ThenBy(g => g.GameId)) {
                 var listItem = Instantiate(
                         runningGamesListItemPrefab,
                         runningGamesListArea.transform,

src/main/protobuf/net/eagle0/eagle/api/eagle.proto

@@ -247,6 +247,8 @@ message GameInfo {
     AvailableLeader leader = 3;
     // Timestamp (millis since epoch) of when this user last took a turn
     int64 last_played_timestamp_millis = 4;
+    // Timestamp (millis since epoch) of when this game was created
+    int64 created_timestamp_millis = 5;
 }
 
 message EagleCommand {

src/main/protobuf/net/eagle0/eagle/internal/running_games.proto

@@ -39,6 +39,9 @@ message RunningGame {
     // Cached faction leader metadata (keyed by faction ID) to avoid loading full game state
     // for lobby display. Populated by save() from in-memory state.
     map<int32, CachedLeaderInfo> faction_leader_cache = 7;
+
+    // Timestamp (millis since epoch) of when this game was created
+    int64 created_timestamp_millis = 8;
 }
 
 message RunningGames {

src/main/scala/net/eagle0/eagle/service/EagleServiceImpl.scala

@@ -589,7 +589,8 @@ class EagleServiceImpl(
                         gameId = gamePlayerInfos.gameId,
                         factionId = gamePlayerInfos.factionId,
                         leader = Some(gamePlayerInfos.leader),
-                        lastPlayedTimestampMillis = gamePlayerInfos.lastPlayedMillis.getOrElse(0L)
+                        lastPlayedTimestampMillis = gamePlayerInfos.lastPlayedMillis.getOrElse(0L),
+                        createdTimestampMillis = gamePlayerInfos.createdTimestampMillis
                       )
                     ),
                   availableGames = gamesManager.availableGamesFor(userId),

src/main/scala/net/eagle0/eagle/service/GamesManager.scala

@@ -64,7 +64,8 @@ case class GamePlayerInfo(
     gameId: GameId,
     factionId: Option[FactionId],
     leader: AvailableLeader,
-    lastPlayedMillis: Option[Long]
+    lastPlayedMillis: Option[Long],
+    createdTimestampMillis: Long
 )
 
 case class WaitingGamePlayerInfo(
@@ -103,7 +104,8 @@ case class ControllerInfo(
     var controller: GameController,
     isAiGame: Boolean,
     maxPlayers: Int,
-    var lastPlayedByUserId: Map[UserId, Long] = Map.empty
+    var lastPlayedByUserId: Map[UserId, Long] = Map.empty,
+    createdTimestampMillis: Long = 0L
 )
 
 object GamesManager {
@@ -603,7 +605,8 @@ class GamesManager(
                     controller = controller,
                     isAiGame = false,
                     maxPlayers = 2,
-                    lastPlayedByUserId = lastPlayedByUserId
+                    lastPlayedByUserId = lastPlayedByUserId,
+                    createdTimestampMillis = runningGame.createdTimestampMillis
                   )
                 }
 
@@ -631,7 +634,8 @@ class GamesManager(
                     controller = initializedController,
                     isAiGame = false,
                     maxPlayers = 2,
-                    lastPlayedByUserId = lastPlayedByUserId
+                    lastPlayedByUserId = lastPlayedByUserId,
+                    createdTimestampMillis = runningGame.createdTimestampMillis
                   )
                 }
 
@@ -804,7 +808,8 @@ class GamesManager(
                 imagePath = cached.imagePath,
                 name = cached.resolvedName
               ),
-              lastPlayedMillis = lastPlayedMillis
+              lastPlayedMillis = lastPlayedMillis,
+              createdTimestampMillis = rg.createdTimestampMillis
             )
           )
 
@@ -831,7 +836,8 @@ class GamesManager(
                       ),
                       resolveName
                     ),
-                    lastPlayedMillis = c.lastPlayedByUserId.get(userId)
+                    lastPlayedMillis = c.lastPlayedByUserId.get(userId),
+                    createdTimestampMillis = rg.createdTimestampMillis
                   )
                 }
             }
@@ -872,7 +878,8 @@ class GamesManager(
                 ),
                 resolveName
               ),
-              lastPlayedMillis = c.lastPlayedByUserId.get(userId).orElse(rg.lastPlayedByUserId.get(userId.value))
+              lastPlayedMillis = c.lastPlayedByUserId.get(userId).orElse(rg.lastPlayedByUserId.get(userId.value)),
+              createdTimestampMillis = rg.createdTimestampMillis
             )
           case None    =>
             // Game not loaded - return placeholder info
@@ -885,7 +892,8 @@ class GamesManager(
                 imagePath = "",
                 name = "[Loading...]"
               ),
-              lastPlayedMillis = rg.lastPlayedByUserId.get(userId.value)
+              lastPlayedMillis = rg.lastPlayedByUserId.get(userId.value),
+              createdTimestampMillis = rg.createdTimestampMillis
             )
         }
       }
@@ -1035,7 +1043,8 @@ class GamesManager(
           // Use new userId-based format only
           userIdToPid = userIdToFid,
           lastPlayedByUserId = lastPlayedByUserId,
-          factionLeaderCache = leaderCache
+          factionLeaderCache = leaderCache,
+          createdTimestampMillis = gc.createdTimestampMillis
         )
     }.toVector
 
@@ -1051,12 +1060,14 @@ class GamesManager(
   private def addController(
       controller: GameController,
       isAiGame: Boolean,
-      maxPlayers: Int
+      maxPlayers: Int,
+      createdTimestampMillis: Long = 0L
   ): GameController = this.synchronized {
     gameControllerInfos += controller.gameId -> ControllerInfo(
       controller = controller,
       isAiGame = isAiGame,
-      maxPlayers = maxPlayers
+      maxPlayers = maxPlayers,
+      createdTimestampMillis = createdTimestampMillis
     )
     controller
   }
@@ -1405,7 +1416,8 @@ class GamesManager(
     addController(
       controller = withAiCommands.gameController,
       isAiGame = false,
-      maxPlayers = 2
+      maxPlayers = 2,
+      createdTimestampMillis = System.currentTimeMillis()
     ): Unit
 
     synchronizedHandlePostResults(withAiCommands): Unit
@@ -1534,7 +1546,8 @@ class GamesManager(
     val updated = addController(
       controller = withAiCommands.gameController,
       isAiGame = humanPlayerCount == 0,
-      maxPlayers = humanPlayerCount + aiPlayerCount
+      maxPlayers = humanPlayerCount + aiPlayerCount,
+      createdTimestampMillis = System.currentTimeMillis()
     )
 
     val result = logger.withStopwatch(s"[CREATE:$gameIdHex] synchronizedHandlePostResults") {