feat(qt): Shift ranges in My QBZ collections

A collection keeps its selection in Rust by persisted position, and
detailToggleItemSelect only toggled. It now takes `shift`: a plain or Ctrl
click toggles and becomes the anchor, a Shift click adds every row between
the anchor and the clicked one in the order the rows are DRAWN (filtered and
sorted, not the position order), and the anchor is dropped wherever the
selection is cleared. The list rows, their checkbox and the grid cards pass
Shift through; the kiosk list passes false.

In select mode a row's artwork still started playback and its title and
subtitle still opened the item or the artist. They stand down now, so the
click selects.

cc

crates/qbz-qt/qml/views/myqbz/MyQbzDetailRow.qml

@@ -171,7 +171,9 @@ Rectangle {
         }
         onClicked: function (mouse) {
             if (mouse.button !== Qt.LeftButton) return
-            if (root.selectMode) QbzMyQbz.detailToggleItemSelect(root.itemPosition)
+            if (root.selectMode)
+                QbzMyQbz.detailToggleItemSelect(root.itemPosition,
+                                                (mouse.modifiers & Qt.ShiftModifier) !== 0)
             else root.openThis()
         }
     }
@@ -247,7 +249,10 @@ Rectangle {
                 visible: root.selectMode
                 anchors.centerIn: parent
                 on: root.selected
-                onToggled: QbzMyQbz.detailToggleItemSelect(root.itemPosition)
+                onToggled: function (mods) {
+                    QbzMyQbz.detailToggleItemSelect(root.itemPosition,
+                                                    (mods & Qt.ShiftModifier) !== 0)
+                }
             }
         }
 
@@ -295,6 +300,10 @@ Rectangle {
                 MouseArea {
                     id: artArea
                     anchors.fill: parent
+                    // In select mode the whole row selects (Shift / Ctrl
+                    // included): the artwork, title and artist stop playing
+                    // or navigating so the click reaches the row body.
+                    enabled: !root.selectMode
                     hoverEnabled: true
                     cursorShape: Qt.PointingHandCursor
                     onClicked: QbzMyQbz.playItem(root.sourceItemId)
@@ -321,6 +330,7 @@ Rectangle {
                     MouseArea {
                         id: titleArea
                         anchors.fill: parent
+                        enabled: !root.selectMode
                         hoverEnabled: true
                         cursorShape: Qt.PointingHandCursor
                         onClicked: root.openThis()
@@ -343,6 +353,7 @@ Rectangle {
                     MouseArea {
                         id: subArea
                         anchors.fill: parent
+                        enabled: !root.selectMode
                         hoverEnabled: true
                         cursorShape: root.subtitleIsLink ? Qt.PointingHandCursor : Qt.ArrowCursor
                         onClicked: {

crates/qbz-qt/qml/views/myqbz/MyQbzDetailView.qml

@@ -1193,7 +1193,10 @@ Rectangle {
                             // selection checkbox rather than bolt one on.
                             selectMode: root.selectMode
                             selected: gcell.cSelected
-                            onSelectToggled: QbzMyQbz.detailToggleItemSelect(gcell.cPosition)
+                            onSelectToggled: function (mods) {
+                                QbzMyQbz.detailToggleItemSelect(gcell.cPosition,
+                                    (mods & Qt.ShiftModifier) !== 0)
+                            }
                             // Card body click, non-select mode only (the card
                             // routes a select-mode click to `selectToggled`).
                             onOpenRequested: QbzMyQbz.openItem(gcell.cSource,