give the selection cards their own parts instead of label blobs

src/ui/selection/ItemChip.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <QPixmap>
+#include <QString>
+#include <QWidget>
+
+class QLabel;
+
+// One buffered item: its icon, its count in a larger type, and a sub-line beneath the
+// count (REQ-UI-SINGLE-SELECTION). Boxed so a row of them reads as separate quantities
+// rather than as a run of text.
+class ItemChip : public QWidget
+{
+    Q_OBJECT
+
+public:
+    // An empty icon leaves the icon off and the chip laid out around the text alone.
+    ItemChip(const QPixmap& icon, QWidget* parent = nullptr);
+
+    void setCount(const QString& count);
+    // Left empty for an item with nothing to say beneath its count.
+    void setSubLine(const QString& subLine);
+
+private:
+    QLabel* m_iconLabel;
+    QLabel* m_countLabel;
+    QLabel* m_subLineLabel;
+};