feat: tray-first UX, text outline, start-at-login toggle, font max 200

- All settings move to flat tray menu; right-click on clock disabled
- ClockLabel: custom QPainterPath text rendering with configurable
  glyph outline (BorderColor) — verified pixel-level offscreen
- Fixed glyph positioning bug (baseline math) caught by isolated test
- Window auto-fits content (adjustSize) — no more oversized clock
- Start at Login: checkable tray item, persisted in QSettings,
  LaunchAgent enable/disable (TDD: roundTrip test caught disable()
  returning false when plist already absent)
- Color dialog: hex/HTML input + 'transparent' + native picker fallback;
  opaque colors stored as #RRGGBB
- Border: glyph outline instead of box border; background still painted
  in paintEvent (QSS doesn't render with WA_TranslucentBackground on macOS)
- Removed window shadow (setHasShadow:NO), no bold, SF Pro Rounded
- Font size dialogs allow up to 200 (was 72)
- macOS: icon template 16pt, light/dark auto-adapt; LaunchAgent points
  to /Applications install

clock_widget.h

@@ -8,9 +8,30 @@
 #include <QMenu>
 #include <QAction>
 #include <QColor>
+#include <optional>
 
 class ConfigManager;
 
+// QLabel that paints its text with an optional outline (border around the
+// glyphs, not a box). QSS cannot stroke text, so we use a QPainterPath.
+class ClockLabel : public QLabel
+{
+    Q_OBJECT
+
+public:
+    explicit ClockLabel(QWidget *parent = nullptr);
+
+    void setDisplayColors(const QColor &textColor, const QColor &outlineColor, qreal outlineWidth);
+
+protected:
+    void paintEvent(QPaintEvent *event) override;
+
+private:
+    QColor m_textColor;
+    QColor m_outlineColor;
+    qreal m_outlineWidth;
+};
+
 class ClockWidget : public QWidget
 {
     Q_OBJECT
@@ -19,18 +40,23 @@ public:
     explicit ClockWidget(QWidget *parent = nullptr);
     ~ClockWidget();
 
+    QMenu *menu() const { return m_contextMenu; }
+
 protected:
     void mousePressEvent(QMouseEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;
     void contextMenuEvent(QContextMenuEvent *event) override;
+    void paintEvent(QPaintEvent *event) override;
 
 private slots:
     void updateTime();
     void toggleAlwaysOnTop();
     void changeFontColor();
     void changeBackgroundColor();
+    void changeBorderColor();
     void changeFontSize();
+    void changeLocationFontSize();
     void changePrimaryTimeZone();
     void changeSecondaryTimeZone();
     void resetSettings();
@@ -44,9 +70,13 @@ private:
     void updateStyleSheet();
     void changeTimeZone(bool primaryClock);
     QString formattedTime(const QString &timeZoneId) const;
+    QString locationName(const QString &timeZoneId) const;
+    std::optional<QColor> pickColor(const QString &title, const QColor &current, QWidget *parent);
 
-    QLabel *m_primaryTimeLabel;
-    QLabel *m_secondaryTimeLabel;
+    ClockLabel *m_primaryTimeLabel;
+    ClockLabel *m_primaryLocationLabel;
+    ClockLabel *m_secondaryTimeLabel;
+    ClockLabel *m_secondaryLocationLabel;
     QTimer *m_timer;
     QMenu *m_contextMenu;
 
@@ -64,7 +94,9 @@ private:
     ConfigManager *m_configManager;
     QColor m_fontColor;
     QColor m_backgroundColor;
+    QColor m_borderColor;
     int m_fontSize;
+    int m_locationFontSize;
     bool m_alwaysOnTop;
     QString m_primaryTimeZoneId;
     QString m_secondaryTimeZoneId;