[Client] Expose custom zone management in the deck editor (#7205)

* [Client] Expose custom zone management in the deck editor

Wires the state layer into every editor surface that shows deck zones.

- Deck dock: context menu on zones gains New/Rename/Delete/Change
  board actions, with per-zone submenus for adding cards.
- Card database dock and visual database display gain an add-to-zone
  submenu listing custom zones per board plus a create-zone entry.
- All prompt call sites pass validateNewZoneName so duplicates and
  reserved names are rejected inline before Ok unlocks.
- Rename reuses the same dialog in name-only mode, keeping one
  validation contract for every zone-name entry point.
- Change board marks the current board instead of offering a no-op,
  and the state layer refuses moves onto boards holding a same-named
  zone from imported decks.

* [DeckEditor] Address custom-zone menu and export review feedback

* [DeckLoader] Keep the sideboard marker and block ordering when exporting nested zones

- saveToStream_DeckZone threads the owning board zone name down to the card
  writer, so cards in a custom zone under the sideboard keep their SB:
  prefix instead of being re-imported into the maindeck
- nested sub-zones are collected during the loop and written after the
  parent zone's own header and cards, so they no longer read as part of the
  zone printed before them

* [DeckEditor] Fix move-to-zone menu use-after-free and per-zone enabled state

- resolve the card name/provider/collector number before createNewCustomZone
  rebuilds the model tree, then re-find the refreshed index via findCard and
  move it (mirrors the decrementCard re-find pattern)
- the enabled test now compares the card's own zone (nearest custom-zone
  ancestor, else its board), matching moveCardToZone's lookup, so moving a
  card out of a custom zone back to the board root is offered and the card's
  own zone is disabled

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_widget.cpp

@@ -21,6 +21,7 @@
 #include <libcockatrice/card/card_info_comparator.h>
 #include <libcockatrice/card/database/card_database.h>
 #include <libcockatrice/card/database/card_database_manager.h>
+#include <libcockatrice/deck_list/tree/inner_deck_list_node.h>
 #include <libcockatrice/settings/cards_display_settings.h>
 #include <utility>
 
@@ -89,6 +90,19 @@ VisualDatabaseDisplayWidget::VisualDatabaseDisplayWidget(QWidget *parent,
     databaseView->setItemDelegate(nullptr);
     databaseView->setVisible(false);
 
+    // Without a deck model there is nothing to add cards to, so the zone menu stays hidden.
+    if (deckListModel) {
+        databaseView->setZoneMenuProvider(
+            [deckListModel]() -> QList<QPair<QString, QStringList>> {
+                QList<QPair<QString, QStringList>> result;
+                for (const QString &boardName : InnerDecklistNode::boardZoneNames()) {
+                    result.append({boardName, deckListModel->getCustomZoneNames(boardName)});
+                }
+                return result;
+            },
+            [this] { return newZoneCreator ? newZoneCreator() : QString(); });
+    }
+
     searchEdit->setTreeView(databaseView);
     searchEdit->installEventFilter(databaseView->getKeySignals());
 
@@ -195,6 +209,11 @@ void VisualDatabaseDisplayWidget::showEvent(QShowEvent *event)
     initializeFilters();
 }
 
+void VisualDatabaseDisplayWidget::setNewZoneCreator(const std::function<QString()> &creator)
+{
+    newZoneCreator = creator;
+}
+
 void VisualDatabaseDisplayWidget::retranslateUi()
 {
     databaseLoadIndicator->setText(tr("Loading database ..."));

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_widget.h

@@ -22,6 +22,7 @@
 #include <QVBoxLayout>
 #include <QWheelEvent>
 #include <QWidget>
+#include <functional>
 #include <libcockatrice/models/database/card_database_model.h>
 #include <libcockatrice/models/deck_list/deck_list_model.h>
 #include <qscrollarea.h>
@@ -46,6 +47,12 @@ public:
     void sortCardList(const QStringList &properties, Qt::SortOrder order) const;
     void setDeckList(const DeckList &new_deck_list_model);
 
+    /**
+     * @brief Sets the callback used to create a custom zone from the add-to-zone menu.
+     * The callback returns the name of the created zone, or an empty string if creation was cancelled.
+     */
+    void setNewZoneCreator(const std::function<QString()> &creator);
+
     CardDatabaseDisplayModel *getDatabaseDisplayModel()
     {
         return databaseDisplayModel;
@@ -106,6 +113,7 @@ private:
     VisualDatabaseDisplayFilterToolbarWidget *filterContainer;
     CardDatabaseDisplayModel *databaseDisplayModel;
     CardDatabaseView *databaseView;
+    std::function<QString()> newZoneCreator;
     QList<ExactCard> *cards;
     QVBoxLayout *mainLayout;
     QScrollArea *scrollArea;