Add English and Russian ChatGUI interface translations

tools/chatgui/src/imageviewer_window.cpp

@@ -1,3 +1,4 @@
+#include <QCoreApplication>
 #include "imageviewer_window.h"
 #include "../../lib/debug_config.h"
 #include <QPainter>
@@ -34,14 +35,14 @@ static QPointF wheelPos(const QWheelEvent* e) {
 ImageViewerWindow::ImageViewerWindow(QWidget *parent)
     : QWidget(parent)
 {
-    setWindowTitle(QStringLiteral("Фото"));
+    setWindowTitle(QCoreApplication::translate("ChatGui", "Photo"));
     setAttribute(Qt::WA_DeleteOnClose, false);
     setMinimumSize(320, 240);
     resize(800, 600);
     setMouseTracking(true);
 
     m_closeBtn = new QPushButton(QStringLiteral("✕"), this);
-    m_closeBtn->setToolTip(QStringLiteral("Закрыть"));
+    m_closeBtn->setToolTip(QCoreApplication::translate("ChatGui", "Close"));
     m_closeBtn->setCursor(Qt::ArrowCursor);
     m_closeBtn->setStyleSheet(
         "QPushButton { background: rgba(0,0,0,0.5); color: white; border: none; "
@@ -56,7 +57,7 @@ ImageViewerWindow::ImageViewerWindow(QWidget *parent)
     m_closeFade = new QPropertyAnimation(m_closeEffect, "opacity", this);
     m_closeFade->setEasingCurve(QEasingCurve::InOutQuad);
 
-    m_hintLabel = new QLabel(QStringLiteral("Ctrl+колесо — зум"), this);
+    m_hintLabel = new QLabel(QCoreApplication::translate("ChatGui", "Ctrl+wheel — zoom"), this);
     m_hintLabel->setAlignment(Qt::AlignCenter);
     m_hintLabel->setAttribute(Qt::WA_TransparentForMouseEvents);
     m_hintLabel->setStyleSheet(
@@ -126,7 +127,7 @@ void ImageViewerWindow::paintEvent(QPaintEvent*) {
 
     if (m_image.isNull()) {
         p.setPen(QColor(150, 150, 150));
-        p.drawText(rect(), Qt::AlignCenter, QStringLiteral("Не удалось загрузить фото"));
+        p.drawText(rect(), Qt::AlignCenter, QCoreApplication::translate("ChatGui", "Failed to load photo"));
         return;
     }