Merge a card refresh (#59)

- **Refactored Card Placement Flow**
  - Separated card presentation from orchestration logic
  - Extracted `CornerCardManager` for pending card lifecycle (spawn, shuffle, rebuild)
  - Extracted `AlbumNavigationService` for book page navigation and zone mapping
  - Extracted `CardEnlargeController` for backdrop management and card reparenting
  - Implemented controller pattern (non-MonoBehaviour) for complex logic
  - Cards now unparent from slots before rebuild to prevent premature destruction

- **Improved Corner Card Display**
  - Fixed cards spawning on top of each other during rebuild
  - Implemented shuffle-to-front logic (remaining cards occupy slots 0→1→2)
  - Added smart card selection (prioritizes cards matching current album page)
  - Pending cards now removed from queue immediately on drag start
  - Corner cards rebuild after each placement with proper slot reassignment

- **Enhanced Album Card Viewing**
  - Added dramatic scale increase when viewing cards from album slots
  - Implemented shrink animation when dismissing enlarged cards
  - Cards transition: `PlacedInSlotState` → `AlbumEnlargedState` → `PlacedInSlotState`
  - Backdrop shows/hides with card enlarge/shrink cycle
  - Cards reparent to enlarged container while viewing, return to slot after

- **State Machine Improvements**
  - Added `CardStateNames` constants for type-safe state transitions
  - Implemented `ICardClickHandler` and `ICardStateDragHandler` interfaces
  - State transitions now use cached property indices
  - `BoosterCardContext` separated from `CardContext` for single responsibility

- **Code Cleanup**
  - Identified unused `SlotContainerHelper.cs` (superseded by `CornerCardManager`)
  - Identified unused `BoosterPackDraggable.canOpenOnDrop` field
  - Identified unused `AlbumViewPage._previousInputMode` (hardcoded value)
  - Identified unused `Card.OnPlacedInAlbumSlot` event (no subscribers)

Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Co-authored-by: Michal Pikulski <michal@foolhardyhorizons.com>
Reviewed-on: #59

Assets/Scripts/CardSystem/StateMachine/States/CardRevealedState.cs

@@ -0,0 +1,76 @@
+using AppleHills.Data.CardSystem;
+using Core.SaveLoad;
+using UnityEngine;
+
+namespace UI.CardSystem.StateMachine.States
+{
+    /// <summary>
+    /// Revealed state - card is flipped and visible at normal size.
+    /// This is the "waiting" state:
+    /// - In booster flow: waiting for all cards to finish before animating to album
+    /// - In album placement flow: waiting to be dragged to a slot
+    /// Shows small idle badges for NEW or REPEAT cards.
+    /// </summary>
+    public class CardRevealedState : AppleState
+    {
+        [Header("State-Owned Visuals")]
+        [SerializeField] private UnityEngine.GameObject newCardIdleBadge;
+        [SerializeField] private UnityEngine.GameObject repeatCardIdleBadge;
+        
+        private CardContext _context;
+        
+        private void Awake()
+        {
+            _context = GetComponentInParent<CardContext>();
+        }
+        
+        public override void OnEnterState()
+        {
+            // Ensure card front is visible and facing camera
+            if (_context.CardDisplay != null)
+            {
+                _context.CardDisplay.gameObject.SetActive(true);
+                _context.CardDisplay.transform.localRotation = Quaternion.Euler(0, 0, 0);
+            }
+            
+            // Show appropriate idle badge unless suppressed
+            if (_context.BoosterContext.SuppressRevealBadges)
+            {
+                if (newCardIdleBadge != null) newCardIdleBadge.SetActive(false);
+                if (repeatCardIdleBadge != null) repeatCardIdleBadge.SetActive(false);
+            }
+            else
+            {
+                bool isNew = Data.CardSystem.CardSystemManager.Instance.IsCardNew(_context.CardData, out CardData existingCard);
+                int currentOwnedCount = (existingCard != null) ? existingCard.CopiesOwned : 0;
+                if (isNew)
+                {
+                    if (newCardIdleBadge != null) newCardIdleBadge.SetActive(true);
+                    if (repeatCardIdleBadge != null) repeatCardIdleBadge.SetActive(false);
+                }
+                else if (currentOwnedCount > 0)
+                {
+                    if (newCardIdleBadge != null) newCardIdleBadge.SetActive(false);
+                    if (repeatCardIdleBadge != null) repeatCardIdleBadge.SetActive(true);
+                }
+                else
+                {
+                    if (newCardIdleBadge != null) newCardIdleBadge.SetActive(false);
+                    if (repeatCardIdleBadge != null) repeatCardIdleBadge.SetActive(false);
+                }
+            }
+            
+            // Fire reveal flow complete event (signals booster page that this card is done)
+            _context.BoosterContext.NotifyRevealComplete();
+        }
+        
+        private void OnDisable()
+        {
+            // Hide badges when leaving state
+            if (newCardIdleBadge != null)
+                newCardIdleBadge.SetActive(false);
+            if (repeatCardIdleBadge != null)
+                repeatCardIdleBadge.SetActive(false);
+        }
+    }
+}