Web panel (like txAdmin) on the game port: login/roles/users, players, kick/ban/op, bans, live console, world reset/backups/restore, settings editor, save ZIP upload/download, start/stop/restart; in-process restart loop; tests

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

LogBuffer.cs

@@ -0,0 +1,33 @@
+namespace MSCO.Server;
+
+/// <summary>Die letzten Log-Zeilen im Speicher - für die Live-Konsole im Web-Panel.</summary>
+public static class LogBuffer
+{
+    public readonly record struct Line(long Seq, string Time, string Text);
+
+    const int Capacity = 3000;
+    static readonly Queue<Line> lines = new();
+    static readonly object gate = new();
+    static long seq;
+
+    public static long LastSeq { get { lock (gate) return seq; } }
+
+    public static void Add(string time, string text)
+    {
+        lock (gate)
+        {
+            lines.Enqueue(new Line(++seq, time, text));
+            while (lines.Count > Capacity) lines.Dequeue();
+        }
+    }
+
+    /// <summary>Zeilen nach der angegebenen Nummer (höchstens max, die neuesten).</summary>
+    public static List<Line> Since(long after, int max)
+    {
+        lock (gate)
+        {
+            var result = lines.Where(l => l.Seq > after).ToList();
+            return result.Count > max ? result.GetRange(result.Count - max, max) : result;
+        }
+    }
+}