vPLASMA (standalone): restore config panel with the 7 JP1 jumpers

The standalone app gets its right-side config panel back, now built around
the real PD01D221's JP1 jumper block (from PlasmaNew/FIRMWARE.md): seven
toggles labelled with each strap's function and HC11 pin. The two baud
straps drive the open baud (4800/9600/19.2K/38.4K; jumper 2 = 9600 default,
the game's rate) via a new VPlasmaSerialService.Baud property; jumper 6
runs a demonstration loop, mirroring the firmware's jumper-6 demo. Plus the
Display controls (self test / clear), live counters, and the wire log.

The glass, auto-open COM12 + named-pipe transport, double-click self-test,
and right-click reset all stay. Only VPlasma.App is touched (plus the
additive Baud property) — the vPLASMA glass embedded in vRIO, which shares
PlasmaCanvas, is left exactly as it was.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/VPlasma.Core/Device/VPlasmaSerialService.cs

@@ -27,6 +27,14 @@ public sealed class VPlasmaSerialService : IDisposable
         _device = device ?? throw new ArgumentNullException(nameof(device));
     }
 
+    /// <summary>
+    /// Bit rate to open the port at (default 9600). On the real display this is
+    /// the baud the two JP1 jumpers select (4800/9600/19.2K/38.4K); over a
+    /// virtual null-modem it's cosmetic, but the standalone app exposes the
+    /// jumpers so it's honored on the next open. Set before <see cref="Open"/>.
+    /// </summary>
+    public int Baud { get; set; } = PlasmaProtocol.BaudRate;
+
     /// <summary>True while a COM port is open.</summary>
     public bool IsOpen => _port?.IsOpen == true;
 
@@ -47,7 +55,7 @@ public sealed class VPlasmaSerialService : IDisposable
 
         Close();
 
-        var port = new SerialPort(portName, PlasmaProtocol.BaudRate, Parity.None, 8, StopBits.One)
+        var port = new SerialPort(portName, Baud, Parity.None, 8, StopBits.One)
         {
             Handshake = Handshake.None,
             // Finite read timeout so the reader thread can notice shutdown.
@@ -65,7 +73,7 @@ public sealed class VPlasmaSerialService : IDisposable
         _reader = new Thread(ReadLoop) { IsBackground = true, Name = "vPLASMA serial reader" };
         _reader.Start();
 
-        Logged?.Invoke($"Opened {portName} @ {PlasmaProtocol.BaudRate} 8N1 — listening for the host");
+        Logged?.Invoke($"Opened {portName} @ {Baud} 8N1 — listening for the host");
         ConnectionChanged?.Invoke(true);
     }