Footer surfaces full LAN URL when control surface is LAN-reachable

When LAN-reachable mode is on, the footer's control-surface badge now shows the full http://<lan-ip>:<port> instead of just :<port>. Operators setting up a thin client can read the URL straight off the host PC's footer without having to open Settings → DISPLAY → Copy URL.

Reverts to the existing 'REST :9755 + OSC :9000' compact form when bound to localhost only — no point spelling out 127.0.0.1 since by definition only the host can reach it.

src/TeamsISO.App/ViewModels/MainViewModel.cs

@@ -545,8 +545,17 @@ public sealed class MainViewModel : ObservableObject, IDisposable
         var rest = app?.ControlSurface?.IsRunning ?? false;
         var osc = app?.OscBridge?.IsRunning ?? false;
         IsControlSurfaceRunning = rest || osc;
+        // When LAN-reachable mode is on, the footer text shows the routable
+        // URL instead of just the port — operators setting up a thin client
+        // shouldn't have to open Settings to find what to type into a
+        // browser. We trust the Settings VM's ControlSurfaceLanReachable
+        // boolean since that's where the toggle is persisted.
+        var lanMode = rest && (app?.ControlSurface?.BoundToLan ?? false);
+        var lanHost = lanMode ? Settings.ControlSurfaceUrl.Replace("/ui", "") : null;
         ControlSurfaceText = (rest, osc) switch
         {
+            (true, true) when lanMode => $"{lanHost} + OSC :{app!.OscBridge!.Port}",
+            (true, false) when lanMode => lanHost!,
             (true, true) => $"REST :{app!.ControlSurface!.Port} + OSC :{app.OscBridge!.Port}",
             (true, false) => $"REST :{app!.ControlSurface!.Port}",
             (false, true) => $"OSC :{app!.OscBridge!.Port}",