[Client] Add zone management to the deck state manager

State-layer operations for custom deck zones, plus the shared prompt
dialog that later editor menus will call into.

- moveCardToZone relocates every copy of a card row into any zone,
  refusing non-card rows and tokens so miswired selections can never
  shred a group or turn tokens into deck cards. The current zone is
  found by walking ancestors, which also handles legacy top-level
  zones.
- createCustomZone, renameCustomZone, moveCustomZone and
  removeCustomZone wrap the tree API with memento history, model
  rebuilds and deck hash refreshes via modifyTree.
- Same-board zone moves return success without minting a history
  entry, keeping the undo log honest.
- promptForNewZone asks for a name and the parent zone, keeps Ok
  disabled until the trimmed name passes a caller-supplied validator
  (shown inline as an error), and reports its own translation context.

Took 14 minutes

# Commit time for manual adjustment:
# Took 6 minutes

# Commit time for manual adjustment:
# Took 33 seconds

libcockatrice_deck_list/libcockatrice/deck_list/tree/inner_deck_list_node.cpp

@@ -43,6 +43,13 @@ void InnerDecklistNode::setSortMethod(DeckSortMethod method)
     }
 }
 
+const QList<QString> &InnerDecklistNode::boardZoneNames()
+{
+    static const QList<QString> names = {QString(DECK_ZONE_MAIN), QString(DECK_ZONE_SIDE),
+                                         QString(DECK_ZONE_MAYBEBOARD)};
+    return names;
+}
+
 QString InnerDecklistNode::getVisibleName() const
 {
     return visibleNameFromName(name);

libcockatrice_deck_list/libcockatrice/deck_list/tree/inner_deck_list_node.h

@@ -18,6 +18,9 @@
 
 #include "abstract_deck_list_node.h"
 
+#include <QList>
+#include <QString>
+
 /** @brief Constant for the "main" deck zone name. */
 #define DECK_ZONE_MAIN "main"
 /** @brief Constant for the "sideboard" zone name. */
@@ -118,6 +121,13 @@ public:
      */
     static QString visibleNameFromName(const QString &_name);
 
+    /**
+     * @brief The standard board zone names, in display order.
+     *
+     * @return main, side and maybeboard.
+     */
+    static const QList<QString> &boardZoneNames();
+
     /**
      * @brief Get this node’s display-friendly name.
      * @return Human-readable name (zone/group name).