feat: initial commit for media tracking software

- Setup C++/Qt6 desktop application structure
- Added initial Go proxy backend for TMDB/IGDB integration

src/ui/StarRating.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <QWidget>
+
+namespace umt {
+
+// Interactive 0..10 rating widget rendered as 5 half-clickable stars.
+class StarRating : public QWidget {
+    Q_OBJECT
+public:
+    explicit StarRating(QWidget *parent = nullptr);
+
+    int rating() const { return m_rating; }          // 0..10 (in half-stars)
+    void setRating(int r);
+    void setReadOnly(bool ro) { m_readOnly = ro; }
+    void setStarSize(int px) { m_star = px; updateGeometry(); }
+
+    QSize sizeHint() const override;
+
+signals:
+    void ratingChanged(int rating);
+
+protected:
+    void paintEvent(QPaintEvent *) override;
+    void mouseMoveEvent(QMouseEvent *) override;
+    void mousePressEvent(QMouseEvent *) override;
+    void leaveEvent(QEvent *) override;
+
+private:
+    int ratingAt(const QPointF &pos) const;          // -> 0..10
+
+    int  m_rating = 0;
+    int  m_hover  = -1;
+    int  m_star   = 22;
+    bool m_readOnly = false;
+};
+
+} // namespace umt