feat(wallet): add reusable wallet modules

Add program-neutral wallet access, a stable account model, reusable QML controls, transaction confirmation, submitted-transaction presentation, and isolated contract tests.

apps/shared/wallet/src/WalletAccountModel.cpp

@@ -0,0 +1,61 @@
+#include "WalletAccountModel.h"
+
+WalletAccountModel::WalletAccountModel(QObject* parent)
+    : QAbstractListModel(parent)
+{
+}
+
+int WalletAccountModel::rowCount(const QModelIndex& parent) const
+{
+    return parent.isValid() ? 0 : m_accounts.size();
+}
+
+QVariant WalletAccountModel::data(const QModelIndex& index, int role) const
+{
+    if (!index.isValid() || index.row() < 0 || index.row() >= m_accounts.size())
+        return {};
+
+    const Entry& account = m_accounts.at(index.row());
+    switch (role) {
+    case NameRole:
+        return account.name;
+    case AddressRole:
+        return account.address;
+    case BalanceRole:
+        return account.balance;
+    case IsPublicRole:
+        return account.isPublic;
+    default:
+        return {};
+    }
+}
+
+QHash<int, QByteArray> WalletAccountModel::roleNames() const
+{
+    return {
+        { NameRole, "name" },
+        { AddressRole, "address" },
+        { BalanceRole, "balance" },
+        { IsPublicRole, "isPublic" },
+    };
+}
+
+void WalletAccountModel::replaceAccounts(const QVector<WalletAccount>& accounts)
+{
+    beginResetModel();
+    const qsizetype oldCount = m_accounts.size();
+    m_accounts.clear();
+    m_accounts.reserve(accounts.size());
+    for (qsizetype index = 0; index < accounts.size(); ++index) {
+        const WalletAccount& account = accounts.at(index);
+        m_accounts.append({
+            QStringLiteral("Account %1").arg(index + 1),
+            account.address,
+            account.balance,
+            account.isPublic,
+        });
+    }
+    endResetModel();
+    if (oldCount != m_accounts.size())
+        emit countChanged();
+}