Own server tags in the web panel (Settings) and server.json

Tags (max. 6, normalized like the keymaster) are sent with the heartbeat;
official and featured are only given by the MSCO admins and are refused with
a note. MSCO_TAGS environment variable.

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

ServerConfig.cs

@@ -8,6 +8,11 @@ public sealed class ServerConfig
     public string LicenseKey { get; set; } = "";
     public string Name { get; set; } = "My MSCO Server";
     public string Description { get; set; } = "";
+    /// <summary>
+    /// Eigene Tags für die Serverliste (z.B. "deutsch", "roleplay"), höchstens 6. "official" und "featured" vergeben
+    /// nur die MSCO-Admins im Keymaster.
+    /// </summary>
+    public List<string> Tags { get; set; } = new();
     public int Port { get; set; } = 7777;
     /// <summary>
     /// Adresse, unter der Spieler den Server erreichen (IP oder Domain). Leer = die IP, von der
@@ -90,6 +95,7 @@ public sealed class ServerConfig
         Name = Take("MSCO_NAME", Name);
         Description = Take("MSCO_DESCRIPTION", Description);
         PublicAddress = Take("MSCO_PUBLIC_ADDRESS", PublicAddress);
+        if (Env("MSCO_TAGS") is string tags) { Tags = NormalizeTags(tags.Split(','), out _); used.Add("MSCO_TAGS"); }
         SteamWebApiKey = Take("MSCO_STEAM_WEB_API_KEY", SteamWebApiKey);
         if (int.TryParse(Env("MSCO_PORT"), out int port)) { Port = port; used.Add("MSCO_PORT"); }
         if (int.TryParse(Env("MSCO_MAX_PLAYERS"), out int max)) { MaxPlayers = max; used.Add("MSCO_MAX_PLAYERS"); }
@@ -103,6 +109,28 @@ public sealed class ServerConfig
         return used;
     }
 
+    public const int MaxTags = 6;
+    /// <summary>Diese Tags vergeben nur die MSCO-Admins (Keymaster), nicht der Server selbst.</summary>
+    public static readonly string[] ReservedTags = { "official", "featured" };
+
+    /// <summary>Wie der Keymaster: "Deutsch, Role Play!" -> ["deutsch", "role-play"]; reservierte fallen weg.</summary>
+    public static List<string> NormalizeTags(IEnumerable<string> input, out List<string> reserved)
+    {
+        reserved = new List<string>();
+        var tags = new List<string>();
+        foreach (string raw in input ?? Array.Empty<string>())
+        {
+            string t = (raw ?? "").Trim().ToLowerInvariant().Replace("ä", "ae").Replace("ö", "oe").Replace("ü", "ue").Replace("ß", "ss");
+            t = System.Text.RegularExpressions.Regex.Replace(t, @"\s+", "-");
+            t = System.Text.RegularExpressions.Regex.Replace(t, "[^a-z0-9-]", "").Trim('-');
+            if (t.Length > 20) t = t[..20].Trim('-');
+            if (t.Length == 0 || tags.Contains(t)) continue;
+            if (ReservedTags.Contains(t)) { if (!reserved.Contains(t)) reserved.Add(t); continue; }
+            if (tags.Count < MaxTags) tags.Add(t);
+        }
+        return tags;
+    }
+
     static string Env(string name)
     {
         string value = Environment.GetEnvironmentVariable(name);