[Game] Animate life counter manipulation (#7100)

* Add animations toggles for the life counter and battlefield

Per-effect toggles plus Enable/Disable-all buttons: a life-counter
flash on loss and a crimson battlefield shimmer on damage.


Took 24 seconds

* Animate life changes with a counter flash and battlefield shimmer

- Life loss/gain pulses the player life counter with a brief flash
- The battlefield table zone shimmers crimson on damage
- Respects the per-effect animation toggles

Both effects drive their decay from GameScene's shared animation timer
through the IAnimatedItem interface (QElapsedTimer based), instead of
owning per-item QTimers.

Took 8 minutes

* Revert unintentional cherry picks

Took 2 minutes

* Lambda to re-use path calculation.

Took 8 minutes

---------

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

cockatrice/src/game_graphics/zones/table_zone.h

@@ -8,16 +8,19 @@
 #define TABLEZONE_H
 
 #include "../../game/zones/table_zone_logic.h"
+#include "../animated_item.h"
 #include "../board/abstract_card_item.h"
 #include "select_zone.h"
 
+#include <QElapsedTimer>
+
 /**
  * @brief TableZone is the grid based rect where CardItems may be placed.
  *
  * It is the main play zone and can be customized with background images.
  */
 //! \todo Refactor methods to make more readable, extract logic to private methods (especially reorganizeCards()).
-class TableZone : public SelectZone
+class TableZone : public SelectZone, public IAnimatedItem
 {
     Q_OBJECT
 
@@ -121,6 +124,16 @@ public:
      */
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
 
+    /**
+       Flashes the table surface after a player loses life.
+
+       Wired up through the life counter so the battlefield glows when life drops.
+     */
+    void triggerDamageShimmer();
+
+    /** @brief Decays the damage shimmer by one timer tick. */
+    bool animationEvent() override;
+
     /**
        Toggles the selected items as tapped.
      */
@@ -185,6 +198,11 @@ public:
     }
 
 private:
+    static constexpr qreal shimmerDurationMs = 450.0;
+
+    QElapsedTimer shimmerClock;
+    qreal damageShimmerAlpha = 0.0;
+
     void paintZoneOutline(QPainter *painter);
     void paintLandDivider(QPainter *painter);