[Client] Fix crash when local game commands are sent after shutdown (#7714)

* [Client] Fix crash when local game commands are sent after shutdown

* [Network] Fix formatting in local client debug log

* [CI] Keep the vcpkg submodule pointer on the manifest baseline

vcpkg.json asks for builtin-baseline 9eec002 (vcpkg 2026.10.16), but the
submodule gitlink was still at 9e593bb. The runners check submodules out
shallowly, so vcpkg-tool cannot read versions/baseline.json out of the baseline
commit and every vcpkg leg (Windows and all macOS) fails in CMake configure
with:

  failed to `git show` versions/baseline.json

git phrases that as "path ... exists on disk, but not in <sha>" even when the
commit is simply absent from the shallow clone, so it reads like a tooling or
network failure rather than a mismatched pointer. Point the submodule back at
9eec002, and add a cheap job that fails when the gitlink and builtin-baseline
disagree, before the five build legs pay for it.

---------

Co-authored-by: sentry[bot] <39604003+sentry[bot]@users.noreply.github.com>
Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

libcockatrice_network/libcockatrice/network/client/local/local_client.cpp

@@ -33,16 +33,18 @@ LocalClient::LocalClient(LocalServerInterface *_lsi,
     sendCommand(prepareSessionCommand(joinCmd));
 }
 
-LocalClient::~LocalClient()
-{
-}
-
 void LocalClient::sendCommandContainer(const CommandContainer &cont)
 {
     if (LocalClientLog().isDebugEnabled()) {
         qCDebug(LocalClientLog).noquote() << userName << "OUT" << getSafeDebugString(cont);
     }
 
+    if (lsi.isNull()) {
+        qCWarning(LocalClientLog).noquote()
+            << userName << "dropping command, local server interface no longer exists:" << getSafeDebugString(cont);
+        return;
+    }
+
     lsi->itemFromClient(cont);
 }
 

libcockatrice_network/libcockatrice/network/client/local/local_client.h

@@ -10,6 +10,7 @@
 #include "../abstract/abstract_client.h"
 
 #include <QLoggingCategory>
+#include <QPointer>
 #include <QString>
 #include <qtmetamacros.h>
 
@@ -24,14 +25,15 @@ class LocalClient : public AbstractClient
 {
     Q_OBJECT
 private:
-    LocalServerInterface *lsi;
+    // Guarded pointer: the LocalServer (and its interfaces) may be destroyed while this client
+    // still has pending commands queued on the event loop.
+    QPointer<LocalServerInterface> lsi;
 
 public:
     LocalClient(LocalServerInterface *_lsi,
                 const QString &_playerName,
                 const QString &_clientId,
                 QObject *parent = nullptr);
-    ~LocalClient() override;
 
     void sendCommandContainer(const CommandContainer &cont) override;
 private slots: