GS_PH_VERSION command, per-printhead demo UI with --printheads CLI arg

Add getPhVersion(printheadId) to Xpl2Client with phVersionReceived signal
carrying all 8 response fields. Mock server echoes canned version data for
any requested printhead ID.

Demo app accepts --printheads N (default 10) to simulate N printheads.
The UI shows a scrollable per-PH list with individual and bulk version
query buttons, updating each row's version info on response.

1 files changed, 1 insertions, 0 deletions

diff --git a/mock-server/MockServer.h b/mock-server/MockServer.h
index 13bb2cd..ce76889 100644
--- a/mock-server/MockServer.h
+++ b/mock-server/MockServer.h
@@ -42,6 +42,7 @@ private:
   void sendReply (QTcpSocket *client, const QByteArray &data);
   void handleKaPing (QTcpSocket *client, const QByteArray &params);
   void handleGsJcVersion (QTcpSocket *client);
+  void handleGsPhVersion (QTcpSocket *client, const QByteArray &params);
 
   Port m_command;
   Port m_imaging;