MSCO 2.9.1: fixes without MSCLoader, admin teleport, MSCO branding

- Own JSON reader (MiniJson) instead of Newtonsoft.Json - the server browser failed with
  "Could not load System.Runtime.Serialization" once MSCLoader was gone
- Mouse cursor visible in admin menu/chat/console (PlayerInMenu)
- Intro "Press any key" screen replaced by an MSCO loading screen; hook PlayMakerFSM.Awake too
- Join links while the game runs: picked up from MSCO\join.txt (written by the launcher)
- Admin menu: TELEPORT tab (home, shop, repair shop, inspection, villages, events, Satsuma)
- Window title/icon "MSCO - My Summer Car Online", MSCO logo in the main menu
- In-game UI restyled like the keymaster website (rounded cards, pills, glow, slim scrollbars)

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

MultiplayerManager.cs

@@ -455,6 +455,20 @@ namespace MSCO
         }
 
         /// <summary>Admin: Satsuma neben sich holen (z.B. wenn er verschwunden oder im Boden ist).</summary>
+        /// <summary>Admin: sich selbst zu einem Ort teleportieren (Haus, Laden ... siehe Cheats.Places).</summary>
+        public void TeleportToPlace(string label, string objectName)
+        {
+            if (!CanCheat || localPlayer == null) return;
+            Vector3 pos;
+            if (!Cheats.FindPlace(objectName, out pos)) { overlays.Log(label + " not found (only works in the game)"); return; }
+            passenger.Exit(localPlayer, playerCamera);
+            if (Cheats.Teleport(localPlayer, pos))
+            {
+                overlays.Log("Teleported to " + label);
+                AnnounceCheat("teleported to " + label);
+            }
+        }
+
         public void BringCar()
         {
             if (!CanCheat || localPlayer == null) return;
@@ -611,6 +625,18 @@ namespace MSCO
             if (host != null) JoinServer(host, port);
         }
 
+        /// <summary>JOIN-Link aus dem Browser, während das Spiel schon läuft (über den Launcher, siehe JoinLinks).</summary>
+        void CheckJoinRequest()
+        {
+            string host;
+            int port;
+            if (!JoinLinks.TryTakeRequest(out host, out port)) return;
+            PendingJoinHost = host;
+            PendingJoinPort = port;
+            if (IsInSession || !MenuHelper.InMenu)
+                toasts.Add("Join link: " + host + ":" + port, "leave this game - then confirm JOIN in the main menu", UiTheme.Accent);
+        }
+
         public void CancelPendingJoin()
         {
             PendingJoinHost = null;
@@ -974,6 +1000,7 @@ namespace MSCO
         void Update()
         {
             CheckHitch();
+            CheckJoinRequest();
             MeasureFps();
             // Menü-Buttons des Spiels nicht durch unser Fenster hindurch auslösen (z.B. Changelog)
             // Solange das Multiplayer-Fenster offen ist, reagiert das Spielmenü (CONTINUE, QUIT ...) gar nicht;