Defer heavy UI model loading for faster startup

- Address table and transaction table now load asynchronously via
  QTimer::singleShot after the event loop starts instead of blocking
  the constructor
- MessageModel (secure messaging) lazy-loaded 1s after wallet init
  or on-demand when navigating to message page
- Splash screen stays visible until window.show() completes
- Guard updateConfirmations() against empty transaction table

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/qt/addresstablemodel.cpp

@@ -7,6 +7,7 @@
 
 #include <QFont>
 #include <QColor>
+#include <QTimer>
 
 const QString AddressTableModel::Send = "S";
 const QString AddressTableModel::Receive = "R";
@@ -145,7 +146,7 @@ AddressTableModel::AddressTableModel(CWallet *wallet, WalletModel *parent) :
 {
     columns << tr("Label") << tr("Address");
     priv = new AddressTablePriv(wallet, this);
-    priv->refreshAddressTable();
+    QTimer::singleShot(0, this, SLOT(refreshAddressTable()));
 }
 
 AddressTableModel::~AddressTableModel()
@@ -326,6 +327,12 @@ void AddressTableModel::updateEntry(const QString &address, const QString &label
     priv->updateEntry(address, label, isMine, status);
 }
 
+void AddressTableModel::refreshAddressTable()
+{
+    priv->refreshAddressTable();
+    reset();
+}
+
 QString AddressTableModel::addRow(const QString &type, const QString &label, const QString &address, int addressType)
 {
     std::string strLabel = label.toStdString();

src/qt/addresstablemodel.h

@@ -89,6 +89,7 @@ signals:
     void defaultAddressChanged(const QString &address);
 
 public slots:
+    void refreshAddressTable();
     /* Update address list from core.
      */
     void updateEntry(const QString &address, const QString &label, bool isMine, int status);

src/qt/transactiontablemodel.cpp

@@ -225,8 +225,7 @@ TransactionTableModel::TransactionTableModel(CWallet* wallet, WalletModel *paren
         cachedNumBlocks(0)
 {
     columns << QString() << tr("Date") << tr("Type") << tr("Address") << tr("Amount");
-
-    priv->refreshWallet();
+    QTimer::singleShot(0, this, SLOT(refreshWallet()));
 
     QTimer *timer = new QTimer(this);
     connect(timer, SIGNAL(timeout()), this, SLOT(updateConfirmations()));
@@ -248,8 +247,17 @@ void TransactionTableModel::updateTransaction(const QString &hash, int status)
     priv->updateWallet(updated, status);
 }
 
+void TransactionTableModel::refreshWallet()
+{
+    priv->refreshWallet();
+    reset();
+}
+
 void TransactionTableModel::updateConfirmations()
 {
+    if(!priv->size())
+        return;
+
     if(nBestHeight != cachedNumBlocks)
     {
         cachedNumBlocks = nBestHeight;

src/qt/transactiontablemodel.h

@@ -77,6 +77,7 @@ private:
     QVariant txAddressDecoration(const TransactionRecord *wtx) const;
 
 public slots:
+    void refreshWallet();
     void updateTransaction(const QString &hash, int status);
     void updateConfirmations();
     void updateDisplayUnit();

src/qt/triangles.cpp

@@ -5,7 +5,6 @@
 #include "clientmodel.h"
 #include "walletmodel.h"
 #include "optionsmodel.h"
-#include "messagemodel.h"
 #include "guiutil.h"
 #include "guiconstants.h"
 
@@ -224,16 +223,11 @@ int main(int argc, char *argv[])
                 // Put this in a block, so that the Model objects are cleaned up before
                 // calling Shutdown().
 
-                if (splashref)
-                    splash.finish(&window);
-
                 ClientModel clientModel(&optionsModel);
                 WalletModel walletModel(pwalletMain, &optionsModel);
-                MessageModel messageModel(pwalletMain, &walletModel);
 
                 window.setClientModel(&clientModel);
                 window.setWalletModel(&walletModel);
-                window.setMessageModel(&messageModel);
 
                 // If -min option passed, start window minimized.
                 if(GetBoolArg("-min"))
@@ -245,6 +239,9 @@ int main(int argc, char *argv[])
                     window.show();
                 }
 
+                if (splashref)
+                    splash.finish(&window);
+
                 // Place this here as guiref has to be defined if we don't want to lose URIs
                 ipcInit(argc, argv);
 

src/qt/trianglesgui.cpp

@@ -95,6 +95,7 @@ TrianglesGUI::TrianglesGUI(bool fIsTestnet, QWidget *parent):
     ui(new Ui::MainWindow),
     clientModel(0),
     walletModel(0),
+    messageModel(0),
     encryptWalletAction(0),
     changePassphraseAction(0),
     unlockWalletAction(0),
@@ -594,6 +595,9 @@ void TrianglesGUI::setWalletModel(WalletModel *walletModel)
 
         // Ask for passphrase if needed
         connect(walletModel, SIGNAL(requireUnlock()), this, SLOT(unlockWallet()));
+
+        // Load secure messaging after the main window can render.
+        QTimer::singleShot(1000, this, SLOT(ensureMessageModel()));
     }
 }
 
@@ -614,6 +618,14 @@ void TrianglesGUI::setMessageModel(MessageModel *messageModel)
     }
 }
 
+void TrianglesGUI::ensureMessageModel()
+{
+    if(messageModel || !walletModel)
+        return;
+
+    setMessageModel(new MessageModel(pwalletMain, walletModel, this));
+}
+
 void TrianglesGUI::createTrayIcon()
 {
 #ifndef Q_OS_MAC
@@ -1025,6 +1037,8 @@ void TrianglesGUI::gotoSendCoinsPage()
 
 void TrianglesGUI::gotoMessagePage()
 {
+    ensureMessageModel();
+
     messageAction->setChecked(true);
     centralWidget->setCurrentWidget(messagePage);
 

src/qt/trianglesgui.h

@@ -180,6 +180,7 @@ public slots:
 
 
 private slots:
+    void ensureMessageModel();
 
     void menuFileRequested();
     void menuOperationsRequested();