Code cleanup

- Add missing isCommandZoneCounterBlocked check to cmdSetCounterActive
  - Revert accidental deck view layout change from b4057a86
  - Fix duplicate @param in playSelectedCardsImpl doc
  - Add null check for PlayerLogic in CommandZoneMenu constructor
  - Add index bounds check in CommandZone handleDropEvent
  - Add index bounds check in StackZone handleDropEvent
  - Add ownership comment for tax counter widget creation
  - Add command zone to zoneGraphicsItems map
  - Conditionally show command zone menu item based on server support
  - Remove layer-violating includes from player_logic.cpp
  - Fix tax counter increment (1 per cast, not 2)
  - Add getTaxCounterIfActive() helper to PlayerGraphicsItem

cockatrice/src/game_graphics/player/player_graphics_item.h

@@ -125,6 +125,8 @@ public:
     }
     /** @brief Returns all tax counter widgets (commander tax and partner tax). */
     [[nodiscard]] QList<AbstractCounter *> getTaxCounterWidgets() const;
+    /** @brief Returns the tax counter if it exists and is active, or nullptr otherwise. */
+    [[nodiscard]] AbstractCounter *getTaxCounterIfActive(int counterId) const;
 
 public slots:
     void onPlayerActiveChanged(bool _active);