restore rescan height dialog, use safe clear+resync approach

RELEASE_NOTES_v1.1.1.md

@@ -14,5 +14,5 @@
 
 | File | SHA-256 |
 |---|---|
-| `SilentDragonXLite` (Linux) | `9f60380b66bbe10366f216457273e648c50831ee8da3b8486ca87a21629a4b22` |
-| `SilentDragonXLite.exe` (Windows) | `26f05e534e4337fac48f6fd36ba17a7de80571e1e565944a7d104ef9419d5efb` |
+| `SilentDragonXLite` (Linux) | `ac44fbdfa343ffb550829827e3fbb95407e2ca3086d6bc34befdc7b5644763a7` |
+| `SilentDragonXLite.exe` (Windows) | `093b6830f23b1f1d407c47f2df90a2c1465b2882a0c3b375237a5b731e36362c` |

src/mainwindow.cpp

@@ -161,10 +161,29 @@ MainWindow::MainWindow(QWidget *parent) :
     QObject::connect(ui->actionRescan, &QAction::triggered, [=]() {
         DEBUG("rescan action triggered");
 
-        // Clear the wallet state and resync from the birthday height.
-        // This uses the existing LightClient — no need to reinitialize.
-        this->getRPC()->clearWallet([=] (auto) {
-            qDebug() << "Clearing wallet state for rescan...";
+        // Ask user for rescan height
+        bool ok;
+        QString heightStr = QInputDialog::getText(this, tr("Rescan Wallet"),
+            tr("Rescan from height (0 to rescan from the beginning):"),
+            QLineEdit::Normal, "0", &ok);
+
+        if (!ok) return;
+
+        QString height = heightStr.trimmed();
+        if (height.isEmpty()) height = "0";
+
+        // Validate it's a number
+        height.toULongLong(&ok);
+        if (!ok) {
+            QMessageBox::warning(this, tr("Invalid height"),
+                tr("Please enter a valid block height number."),
+                QMessageBox::Ok);
+            return;
+        }
+
+        // Clear wallet state from the specified height, then resync
+        rpc->getConnection()->doRPCWithDefaultErrorHandling("clear", height, [=] (auto) {
+            qDebug() << "Cleared wallet state to height" << height;
             this->getRPC()->saveWallet([=] (auto) {
                 qDebug() << "Saved cleared wallet, reloading connection to start rescan...";
                 auto cl = new ConnectionLoader(this, rpc);