friends: richer GetFriendList payload (field aliases) + log returned JSON

The friend tile rendered empty/offline because the UE client couldn't read our
best-guess response shape. Expose each friend's identity/name/steam/presence under
every plausible field name (camelCase + PlayFab PascalCase, flat + nested profile)
under both friends/Friends keys, and log the JSON so we can pin the exact shape.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Prospect.Server.Api/Services/CloudScript/Functions/GetFriendList.cs

@@ -32,9 +32,8 @@ public class GetFriendList : ICloudScriptFunction<FYBaseSocialRequest, object?>
         }
         var userId = context.User.FindAuthUserId();
 
-        // Resolve the imported Steam friends (persisted by ClientsideFriendsImport) to the
-        // players that actually exist on this server. It's a private server, so only friends
-        // who have logged in here will show up.
+        // Imported Steam friends (persisted by ClientsideFriendsImport), resolved to players
+        // that actually exist on this private server.
         var steamIds = new List<string>();
         var userData = await _userDataService.FindAsync(userId, userId, new List<string> { "ImportedSteamFriends" });
         if (userData.TryGetValue("ImportedSteamFriends", out var rec) && !string.IsNullOrWhiteSpace(rec.Value))
@@ -52,8 +51,10 @@ public class GetFriendList : ICloudScriptFunction<FYBaseSocialRequest, object?>
             {
                 if (player.Id == userId) continue; // never list yourself
 
-                // Presence persisted by UpdatePlayerPresenceState: online if seen in the last
-                // 3 minutes. EYUserState best-effort: 0 = offline, 1 = online, 2 = in match.
+                var steamId = player.Auth?.FirstOrDefault(a => a.Type == PlayFabUserAuthType.Steam)?.Key ?? "";
+                var displayName = string.IsNullOrWhiteSpace(player.DisplayName) ? "Prospector" : player.DisplayName;
+
+                // 0 = offline, 1 = online, 2 = in match. Online if seen in the last 3 minutes.
                 var onlineState = 0;
                 var presenceData = await _userDataService.FindAsync(player.Id, player.Id, new List<string> { "PresenceState" });
                 if (presenceData.TryGetValue("PresenceState", out var presenceRec) && !string.IsNullOrWhiteSpace(presenceRec.Value))
@@ -69,22 +70,50 @@ public class GetFriendList : ICloudScriptFunction<FYBaseSocialRequest, object?>
                     catch { /* ignore malformed presence */ }
                 }
 
+                // The exact model the UE client binds is not documented, so expose the identity
+                // under every plausible field name (camelCase + PlayFab PascalCase) and both a
+                // flat and nested profile — whichever the client reads, the tile gets populated.
                 friends.Add(new
                 {
-                    profile = new
-                    {
-                        playerId = player.Id,
-                        displayName = player.DisplayName,
-                        avatarUrl = "",
-                    },
+                    // identity
+                    friendPlayFabId = player.Id,
+                    FriendPlayFabId = player.Id,
+                    playerId = player.Id,
+                    PlayerId = player.Id,
+                    playFabId = player.Id,
+                    PlayFabId = player.Id,
+                    // name
+                    displayName,
+                    DisplayName = displayName,
+                    titleDisplayName = displayName,
+                    TitleDisplayName = displayName,
+                    name = displayName,
+                    username = displayName,
+                    Username = displayName,
+                    // steam
+                    steamId,
+                    SteamId = steamId,
+                    steamInfo = new { steamId, SteamId = steamId },
+                    SteamInfo = new { SteamId = steamId, steamId },
+                    // presence
                     onlineState,
+                    OnlineState = onlineState,
+                    isOnline = onlineState > 0,
+                    inMatch = onlineState == 2,
+                    presence = new { onlineState, state = onlineState },
+                    avatarUrl = "",
+                    // nested profiles
+                    profile = new { playerId = player.Id, displayName, avatarUrl = "" },
+                    Profile = new { PlayerId = player.Id, DisplayName = displayName, PlayerProfileModel = new { DisplayName = displayName } },
+                    tags = Array.Empty<string>(),
+                    Tags = Array.Empty<string>(),
                 });
             }
         }
 
-        // NOTE: the exact response shape the client expects is not yet confirmed; this is a
-        // best-effort structure. The log lets us verify resolution while we validate in game.
-        _logger.LogInformation("GetFriendList for {User}: {Count} friend(s) resolved on server", userId, friends.Count);
-        return new { friends };
+        // Return the list under both the camelCase and PlayFab-cased container keys.
+        var result = new { friends, Friends = friends, count = friends.Count };
+        _logger.LogInformation("GetFriendList for {User}: {Count} friend(s); payload={Json}", userId, friends.Count, JsonSerializer.Serialize(result));
+        return result;
     }
 }