feat: dual time zones, autostart, tray icon, config relocation, tests

- Dual clock (primary/secondary time zone) with IANA picker, persisted in XML
- AutoStartManager: macOS LaunchAgent (com.clouck.clock, RunAtLoad)
- Tray icon: template image, light/dark adaptation, toggle + quit menu
- ConfigManager: default path moved to QStandardPaths::AppConfigLocation
- Qt Test suite (ConfigManager, AutoStartManager) wired into CTest
- GitHub origin renamed to upstream; private Gitea repo as origin

clock_widget.cpp

@@ -2,13 +2,14 @@
 #include "config_manager.h"
 #include "window_helper.h"
 #include <QVBoxLayout>
-#include <QTime>
+#include <QDateTime>
 #include <QColorDialog>
 #include <QFontDialog>
 #include <QInputDialog>
 #include <QMessageBox>
 #include <QApplication>
 #include <QScreen>
+#include <QTimeZone>
 
 ClockWidget::ClockWidget(QWidget *parent)
     : QWidget(parent), m_dragging(false), m_resizing(false), m_resizeBorder(5)
@@ -48,11 +49,14 @@ ClockWidget::~ClockWidget()
 
 void ClockWidget::setupUI()
 {
-    m_timeLabel = new QLabel(this);
-    m_timeLabel->setAlignment(Qt::AlignCenter);
+    m_primaryTimeLabel = new QLabel(this);
+    m_secondaryTimeLabel = new QLabel(this);
+    m_primaryTimeLabel->setAlignment(Qt::AlignCenter);
+    m_secondaryTimeLabel->setAlignment(Qt::AlignCenter);
 
     QVBoxLayout *layout = new QVBoxLayout(this);
-    layout->addWidget(m_timeLabel);
+    layout->addWidget(m_primaryTimeLabel);
+    layout->addWidget(m_secondaryTimeLabel);
     layout->setContentsMargins(10, 10, 10, 10);
 }
 
@@ -74,6 +78,12 @@ void ClockWidget::createMenu()
     QAction *fontSizeAction = new QAction("Set Font Size", this);
     connect(fontSizeAction, &QAction::triggered, this, &ClockWidget::changeFontSize);
 
+    QAction *primaryTimeZoneAction = new QAction("Set First Time Zone", this);
+    connect(primaryTimeZoneAction, &QAction::triggered, this, &ClockWidget::changePrimaryTimeZone);
+
+    QAction *secondaryTimeZoneAction = new QAction("Set Second Time Zone", this);
+    connect(secondaryTimeZoneAction, &QAction::triggered, this, &ClockWidget::changeSecondaryTimeZone);
+
     QAction *resetAction = new QAction("Reset Settings", this);
     connect(resetAction, &QAction::triggered, this, &ClockWidget::resetSettings);
 
@@ -86,6 +96,9 @@ void ClockWidget::createMenu()
     m_contextMenu->addAction(bgColorAction);
     m_contextMenu->addAction(fontSizeAction);
     m_contextMenu->addSeparator();
+    m_contextMenu->addAction(primaryTimeZoneAction);
+    m_contextMenu->addAction(secondaryTimeZoneAction);
+    m_contextMenu->addSeparator();
     m_contextMenu->addAction(resetAction);
     m_contextMenu->addAction(quitAction);
 }
@@ -179,8 +192,8 @@ void ClockWidget::contextMenuEvent(QContextMenuEvent *event)
 
 void ClockWidget::updateTime()
 {
-    QString currentTime = QTime::currentTime().toString("HH:mm:ss");
-    m_timeLabel->setText(currentTime);
+    m_primaryTimeLabel->setText(formattedTime(m_primaryTimeZoneId));
+    m_secondaryTimeLabel->setText(formattedTime(m_secondaryTimeZoneId));
 }
 
 void ClockWidget::toggleAlwaysOnTop()
@@ -240,6 +253,16 @@ void ClockWidget::changeFontSize()
     }
 }
 
+void ClockWidget::changePrimaryTimeZone()
+{
+    changeTimeZone(true);
+}
+
+void ClockWidget::changeSecondaryTimeZone()
+{
+    changeTimeZone(false);
+}
+
 void ClockWidget::resetSettings()
 {
     int ret = QMessageBox::question(this, "Reset Settings", "Are you sure you want to reset all settings?");
@@ -304,6 +327,8 @@ void ClockWidget::loadSettings()
     m_backgroundColor = m_configManager->backgroundColor();
     m_fontSize = m_configManager->fontSize();
     m_alwaysOnTop = m_configManager->alwaysOnTop();
+    m_primaryTimeZoneId = m_configManager->primaryTimeZoneId();
+    m_secondaryTimeZoneId = m_configManager->secondaryTimeZoneId();
 
     // Restore window position and size
     QPoint windowPos = m_configManager->windowPosition();
@@ -344,6 +369,8 @@ void ClockWidget::saveSettings()
     m_configManager->setAlwaysOnTop(m_alwaysOnTop);
     m_configManager->setWindowPosition(pos());
     m_configManager->setWindowSize(size());
+    m_configManager->setPrimaryTimeZoneId(m_primaryTimeZoneId);
+    m_configManager->setSecondaryTimeZoneId(m_secondaryTimeZoneId);
 
     // Save to XML file
     if (!m_configManager->saveSettings())
@@ -357,6 +384,7 @@ void ClockWidget::updateStyleSheet()
     QString styleSheet = QString(
                              "QLabel { "
                              "color: %1; "
+                             "font-family: 'SF Pro Rounded'; "
                              "font-size: %2pt; "
                              "font-weight: bold; "
                              "background-color: %3; "
@@ -367,6 +395,65 @@ void ClockWidget::updateStyleSheet()
                                   QString::number(m_fontSize),
                                   m_backgroundColor.name(QColor::HexArgb));
 
-    m_timeLabel->setStyleSheet(styleSheet);
+    m_primaryTimeLabel->setStyleSheet(styleSheet);
+    m_secondaryTimeLabel->setStyleSheet(styleSheet);
     setStyleSheet(QString("background-color: transparent;"));
 }
+
+void ClockWidget::changeTimeZone(bool primaryClock)
+{
+    QStringList timeZoneIds;
+    for (const QByteArray &timeZoneId : QTimeZone::availableTimeZoneIds())
+    {
+        timeZoneIds.append(QString::fromUtf8(timeZoneId));
+    }
+
+    const QString currentTimeZoneId = primaryClock ? m_primaryTimeZoneId : m_secondaryTimeZoneId;
+    const int currentIndex = timeZoneIds.indexOf(currentTimeZoneId);
+    bool accepted = false;
+    const QString selectedTimeZoneId = QInputDialog::getItem(
+        this,
+        primaryClock ? "Set First Time Zone" : "Set Second Time Zone",
+        "Time Zone:",
+        timeZoneIds,
+        currentIndex < 0 ? 0 : currentIndex,
+        false,
+        &accepted);
+
+    if (!accepted)
+    {
+        return;
+    }
+
+    if (primaryClock)
+    {
+        m_primaryTimeZoneId = selectedTimeZoneId;
+        m_configManager->setPrimaryTimeZoneId(selectedTimeZoneId);
+    }
+    else
+    {
+        m_secondaryTimeZoneId = selectedTimeZoneId;
+        m_configManager->setSecondaryTimeZoneId(selectedTimeZoneId);
+    }
+
+    if (!m_configManager->saveSettings())
+    {
+        qDebug() << "Failed to save time zone settings to config.xml";
+    }
+    updateTime();
+}
+
+QString ClockWidget::formattedTime(const QString &timeZoneId) const
+{
+    const QTimeZone timeZone(timeZoneId.toUtf8());
+    if (!timeZone.isValid())
+    {
+        qWarning() << "Invalid time zone configured:" << timeZoneId;
+        return QString("Invalid time zone\n%1").arg(timeZoneId);
+    }
+
+    const QDateTime timeInZone = QDateTime::currentDateTimeUtc().toTimeZone(timeZone);
+    const QString cityName = QString::fromUtf8(timeZone.id()).section('/', -1).replace('_', ' ');
+    return QString("%1\n%2")
+        .arg(timeInZone.time().toString("HH:mm"), cityName);
+}