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  - Identified unused `SlotContainerHelper.cs` (superseded by `CornerCardManager`)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/Controllers/AlbumNavigationService.cs

@@ -0,0 +1,172 @@
+using System.Collections.Generic;
+using AppleHills.Data.CardSystem;
+using Core;
+using UnityEngine;
+
+namespace UI.CardSystem
+{
+    /// <summary>
+    /// Manages album page navigation, zone mapping, and page flip tracking.
+    /// Created and owned by AlbumViewPage (not a Unity component).
+    /// </summary>
+    public class AlbumNavigationService
+    {
+        private readonly BookCurlPro.BookPro _book;
+        private readonly BookTabButton[] _zoneTabs;
+        
+        private bool _isPageFlipping = false;
+        
+        /// <summary>
+        /// Is the book currently flipping to a page?
+        /// </summary>
+        public bool IsPageFlipping => _isPageFlipping;
+        
+        /// <summary>
+        /// Constructor - called by AlbumViewPage's lazy property
+        /// </summary>
+        public AlbumNavigationService(BookCurlPro.BookPro book, BookTabButton[] zoneTabs)
+        {
+            _book = book;
+            _zoneTabs = zoneTabs;
+        }
+        
+        /// <summary>
+        /// Check if we're currently viewing the album proper (not the menu page)
+        /// </summary>
+        public bool IsInAlbumProper()
+        {
+            if (_book == null)
+            {
+                Logging.Warning("[AlbumNavigationService] Book reference is null");
+                return false;
+            }
+            
+            // Page 1 is the menu/cover, page 2+ are album pages with card slots
+            return _book.CurrentPaper > 1;
+        }
+        
+        /// <summary>
+        /// Navigate to the page where a specific card belongs
+        /// </summary>
+        public void NavigateToCardPage(CardData cardData, System.Action onComplete)
+        {
+            if (cardData == null || _book == null)
+            {
+                onComplete?.Invoke();
+                return;
+            }
+            
+            // Find target page based on card's zone
+            int targetPage = FindPageForZone(cardData.Zone);
+            
+            if (targetPage < 0)
+            {
+                Logging.Warning($"[AlbumNavigationService] No page found for zone {cardData.Zone}");
+                onComplete?.Invoke();
+                return;
+            }
+            
+            // Mark as flipping
+            _isPageFlipping = true;
+            Logging.Debug($"[AlbumNavigationService] Starting page flip to page {targetPage}");
+            
+            // Get or add AutoFlip component
+            BookCurlPro.AutoFlip autoFlip = _book.GetComponent<BookCurlPro.AutoFlip>();
+            if (autoFlip == null)
+            {
+                autoFlip = _book.gameObject.AddComponent<BookCurlPro.AutoFlip>();
+            }
+            
+            // Start flipping with callback
+            autoFlip.enabled = true;
+            autoFlip.StartFlipping(targetPage, () => 
+            {
+                // Mark as complete
+                _isPageFlipping = false;
+                Logging.Debug($"[AlbumNavigationService] Page flip to {targetPage} completed");
+                
+                // Call original callback if provided
+                onComplete?.Invoke();
+            });
+        }
+        
+        /// <summary>
+        /// Get list of card definition IDs on the current page
+        /// </summary>
+        public List<string> GetDefinitionsOnCurrentPage()
+        {
+            var result = new List<string>();
+            if (_book == null) return result;
+            
+            int currentPage = _book.CurrentPaper;
+            
+            // Find all AlbumCardSlot in scene
+            var allSlots = Object.FindObjectsByType<AlbumCardSlot>(FindObjectsSortMode.None);
+            
+            foreach (var slot in allSlots)
+            {
+                if (IsSlotOnPage(slot.transform, currentPage))
+                {
+                    if (slot.TargetCardDefinition != null && !string.IsNullOrEmpty(slot.TargetCardDefinition.Id))
+                    {
+                        result.Add(slot.TargetCardDefinition.Id);
+                    }
+                }
+            }
+            
+            return result;
+        }
+        
+        #region Private Helpers
+        
+        /// <summary>
+        /// Find the target page for a card zone using BookTabButtons
+        /// </summary>
+        private int FindPageForZone(CardZone zone)
+        {
+            if (_zoneTabs == null || _zoneTabs.Length == 0)
+            {
+                Logging.Warning("[AlbumNavigationService] No zone tabs available!");
+                return -1;
+            }
+            
+            foreach (var tab in _zoneTabs)
+            {
+                if (tab.Zone == zone)
+                {
+                    return tab.TargetPage;
+                }
+            }
+            
+            Logging.Warning($"[AlbumNavigationService] No BookTabButton found for zone {zone}");
+            return -1;
+        }
+        
+        /// <summary>
+        /// Check if a slot's transform is on a specific book page
+        /// </summary>
+        private bool IsSlotOnPage(Transform slotTransform, int pageIndex)
+        {
+            if (_book == null || _book.papers == null || pageIndex < 0 || pageIndex >= _book.papers.Length)
+                return false;
+            
+            var paper = _book.papers[pageIndex];
+            if (paper == null) return false;
+            
+            // Check if slotTransform parent hierarchy contains paper.Front or paper.Back
+            Transform current = slotTransform;
+            while (current != null)
+            {
+                if ((paper.Front != null && current.gameObject == paper.Front) || 
+                    (paper.Back != null && current.gameObject == paper.Back))
+                    return true;
+                current = current.parent;
+            }
+            
+            return false;
+        }
+        
+        #endregion
+    }
+}
+

Assets/Scripts/CardSystem/Controllers/AlbumNavigationService.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 5dce94e276b8456996d9ddacef25c744
+timeCreated: 1763425777

Assets/Scripts/CardSystem/Controllers/CardEnlargeController.cs

@@ -0,0 +1,128 @@
+using Core;
+using UI.CardSystem.StateMachine;
+using UnityEngine;
+
+namespace UI.CardSystem
+{
+    /// <summary>
+    /// Manages card enlarge system: backdrop display and card reparenting.
+    /// Created and owned by AlbumViewPage (not a Unity component).
+    /// </summary>
+    public class CardEnlargeController
+    {
+        private readonly GameObject _backdrop;
+        private readonly Transform _enlargedContainer;
+        
+        /// <summary>
+        /// Constructor - called by AlbumViewPage's lazy property
+        /// </summary>
+        public CardEnlargeController(GameObject backdrop, Transform enlargedContainer)
+        {
+            _backdrop = backdrop;
+            _enlargedContainer = enlargedContainer;
+        }
+        
+        /// <summary>
+        /// Subscribe to a placed card's enlarged state events
+        /// </summary>
+        public void RegisterCard(StateMachine.Card card)
+        {
+            if (card == null) return;
+            
+            var enlargeState = card.GetStateComponent<StateMachine.States.CardAlbumEnlargedState>(CardStateNames.AlbumEnlarged);
+            if (enlargeState != null)
+            {
+                enlargeState.OnEnlargeRequested += OnCardEnlargeRequested;
+                enlargeState.OnShrinkRequested += OnCardShrinkRequested;
+            }
+        }
+        
+        /// <summary>
+        /// Unsubscribe from a card's enlarged state events
+        /// </summary>
+        public void UnregisterCard(StateMachine.Card card)
+        {
+            if (card == null) return;
+            
+            var enlargeState = card.GetStateComponent<StateMachine.States.CardAlbumEnlargedState>(CardStateNames.AlbumEnlarged);
+            if (enlargeState != null)
+            {
+                enlargeState.OnEnlargeRequested -= OnCardEnlargeRequested;
+                enlargeState.OnShrinkRequested -= OnCardShrinkRequested;
+            }
+        }
+        
+        /// <summary>
+        /// Clean up enlarged card state (on page close)
+        /// </summary>
+        public void CleanupEnlargedState()
+        {
+            // Hide backdrop if visible
+            if (_backdrop != null && _backdrop.activeSelf)
+            {
+                _backdrop.SetActive(false);
+            }
+            
+            // If there's an enlarged card in the container, return it to its slot
+            if (_enlargedContainer != null && _enlargedContainer.childCount > 0)
+            {
+                for (int i = _enlargedContainer.childCount - 1; i >= 0; i--)
+                {
+                    Transform cardTransform = _enlargedContainer.GetChild(i);
+                    var card = cardTransform.GetComponent<StateMachine.Card>();
+                    var state = cardTransform.GetComponentInChildren<StateMachine.States.CardAlbumEnlargedState>(true);
+                    if (card != null && state != null)
+                    {
+                        Transform originalParent = state.GetOriginalParent();
+                        if (originalParent != null)
+                        {
+                            cardTransform.SetParent(originalParent, true);
+                            cardTransform.localPosition = state.GetOriginalLocalPosition();
+                            cardTransform.localRotation = state.GetOriginalLocalRotation();
+                        }
+                    }
+                }
+            }
+        }
+        
+        #region Event Handlers
+        
+        private void OnCardEnlargeRequested(StateMachine.States.CardAlbumEnlargedState state)
+        {
+            if (state == null) return;
+            
+            // Show backdrop
+            if (_backdrop != null)
+            {
+                _backdrop.SetActive(true);
+            }
+            
+            // Reparent card root to enlarged container preserving world transform
+            if (_enlargedContainer != null)
+            {
+                var ctx = state.GetComponentInParent<StateMachine.CardContext>();
+                if (ctx != null)
+                {
+                    ctx.RootTransform.SetParent(_enlargedContainer, true);
+                    ctx.RootTransform.SetAsLastSibling();
+                }
+            }
+        }
+        
+        private void OnCardShrinkRequested(StateMachine.States.CardAlbumEnlargedState state)
+        {
+            if (state == null) return;
+            
+            // Hide backdrop; state will animate back to slot and reparent on completion
+            if (_backdrop != null)
+            {
+                _backdrop.SetActive(false);
+            }
+            
+            // Do not reparent here; reverse animation is orchestrated by the state
+        }
+        
+        #endregion
+    }
+}
+

Assets/Scripts/CardSystem/Controllers/CardEnlargeController.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: f0c2c6c12ee64ccabe778e848ac9c822
+timeCreated: 1763425800

Assets/Scripts/CardSystem/Controllers/CornerCardManager.cs

@@ -0,0 +1,392 @@
+using System.Collections.Generic;
+using System.Linq;
+using AppleHills.Data.CardSystem;
+using Core;
+using Data.CardSystem;
+using UI.DragAndDrop.Core;
+using UnityEngine;
+
+namespace UI.CardSystem
+{
+    /// <summary>
+    /// Manages corner card spawning, selection, shuffling, and rebuilding.
+    /// Created and owned by AlbumViewPage (not a Unity component).
+    /// </summary>
+    public class CornerCardManager
+    {
+        private readonly SlotContainer _slots;
+        private readonly GameObject _cardPrefab;
+        private readonly AlbumViewPage _owner;
+        
+        private List<StateMachine.Card> _pendingCards = new List<StateMachine.Card>();
+        private const int MaxVisible = 3;
+        
+        /// <summary>
+        /// Constructor - called by AlbumViewPage's lazy property
+        /// </summary>
+        public CornerCardManager(SlotContainer slots, GameObject cardPrefab, AlbumViewPage owner)
+        {
+            _slots = slots;
+            _cardPrefab = cardPrefab;
+            _owner = owner;
+        }
+        
+        /// <summary>
+        /// Get the list of currently spawned corner cards
+        /// </summary>
+        public List<StateMachine.Card> PendingCards => _pendingCards;
+        
+        /// <summary>
+        /// Spawn pending corner cards with initial setup
+        /// </summary>
+        public void SpawnCards()
+        {
+            RebuildCards();
+        }
+        
+        /// <summary>
+        /// Rebuild corner card display incrementally.
+        /// Flow: 1) Shuffle remaining cards to front slots (0→1→2)
+        ///       2) Spawn new card in last slot if needed
+        /// Called on initial spawn and after card is removed.
+        /// </summary>
+        public void RebuildCards()
+        {
+            if (_cardPrefab == null || _slots == null) return;
+            
+            // Step 1: Determine how many cards should be displayed
+            var uniquePending = GetUniquePendingCards();
+            int totalPendingCards = uniquePending.Count;
+            int cardsToDisplay = Mathf.Min(totalPendingCards, MaxVisible);
+            
+            int currentCardCount = _pendingCards.Count;
+            
+            Logging.Debug($"[CornerCardManager] RebuildCards: current={currentCardCount}, target={cardsToDisplay}");
+            
+            // Step 2: Remove excess cards if we have too many
+            while (_pendingCards.Count > cardsToDisplay)
+            {
+                int lastIndex = _pendingCards.Count - 1;
+                var cardToRemove = _pendingCards[lastIndex];
+                
+                if (cardToRemove != null)
+                {
+                    if (cardToRemove.Context != null)
+                    {
+                        cardToRemove.Context.OnDragStarted -= OnCardDragStarted;
+                    }
+                    Object.Destroy(cardToRemove.gameObject);
+                }
+                
+                _pendingCards.RemoveAt(lastIndex);
+                Logging.Debug($"[CornerCardManager] Removed excess card, now have {_pendingCards.Count}");
+            }
+            
+            // Step 3: Shuffle remaining cards to occupy first slots (0, 1, 2)
+            ShuffleCardsToFrontSlots();
+            
+            // Step 4: Spawn new cards in remaining slots if needed
+            while (_pendingCards.Count < cardsToDisplay)
+            {
+                int slotIndex = _pendingCards.Count; // Next available slot
+                var slot = FindSlotByIndex(slotIndex);
+                
+                if (slot == null)
+                {
+                    Logging.Warning($"[CornerCardManager] Slot {slotIndex} not found, stopping spawn");
+                    break;
+                }
+                
+                SpawnCardInSlot(slot);
+                Logging.Debug($"[CornerCardManager] Added new card in slot {slotIndex}, now have {_pendingCards.Count}");
+            }
+            
+            if (cardsToDisplay == 0)
+            {
+                Logging.Debug("[CornerCardManager] No pending cards to display in corner");
+            }
+        }
+        
+        /// <summary>
+        /// Smart card selection from pending queue.
+        /// Prioritizes cards that belong on current album page, falls back to random.
+        /// Removes selected card from pending and rebuilds corner.
+        /// </summary>
+        public CardData GetSmartSelection()
+        {
+            if (CardSystemManager.Instance == null) return null;
+            var pending = CardSystemManager.Instance.GetPendingRevealCards();
+            if (pending.Count == 0) return null;
+            
+            // Try current page match
+            var pageDefs = _owner.GetDefinitionsOnCurrentPage();
+            var match = pending.Find(c => pageDefs.Contains(c.DefinitionId));
+            
+            // If no match, use random
+            if (match == null)
+            {
+                int idx = Random.Range(0, pending.Count);
+                match = pending[idx];
+            }
+            
+            // IMPORTANT: Remove from pending list immediately
+            // Card is now in "reveal flow" and will be added to collection when placed
+            if (match != null)
+            {
+                // Remove from pending using the manager (fires OnPendingCardRemoved event)
+                CardSystemManager.Instance.RemoveFromPending(match);
+                Logging.Debug($"[CornerCardManager] Removed '{match.Name}' from pending cards, starting reveal flow");
+                
+                // Rebuild corner cards AFTER removing from pending list
+                // This ensures the removed card doesn't get re-spawned
+                RebuildCards();
+            }
+            
+            return match;
+        }
+        
+        /// <summary>
+        /// Cleanup all corner cards (on page close)
+        /// </summary>
+        public void CleanupAllCards()
+        {
+            // First, unsubscribe and destroy tracked cards
+            foreach (var c in _pendingCards)
+            {
+                if (c != null)
+                {
+                    if (c.Context != null)
+                    {
+                        c.Context.OnDragStarted -= OnCardDragStarted;
+                    }
+                    Object.Destroy(c.gameObject);
+                }
+            }
+            _pendingCards.Clear();
+            
+            // IMPORTANT: Also clear ALL children from corner slots
+            // This catches cards that were removed from tracking but not destroyed
+            // (e.g., cards being dragged to album)
+            if (_slots != null)
+            {
+                foreach (var slot in _slots.Slots)
+                {
+                    if (slot == null || slot.transform == null) continue;
+                    
+                    // Destroy all card children in this slot
+                    for (int i = slot.transform.childCount - 1; i >= 0; i--)
+                    {
+                        var child = slot.transform.GetChild(i);
+                        var card = child.GetComponent<StateMachine.Card>();
+                        if (card != null)
+                        {
+                            // Unsubscribe if somehow still subscribed
+                            if (card.Context != null)
+                            {
+                                card.Context.OnDragStarted -= OnCardDragStarted;
+                            }
+                            Object.Destroy(child.gameObject);
+                            Logging.Debug($"[CornerCardManager] Cleaned up orphaned card from slot {slot.SlotIndex}");
+                        }
+                    }
+                }
+            }
+        }
+        
+        /// <summary>
+        /// Notify that a card has been placed in album (remove from tracking)
+        /// </summary>
+        public void NotifyCardPlaced(StateMachine.Card card)
+        {
+            if (card != null)
+            {
+                // Remove from tracking list
+                _pendingCards.Remove(card);
+                
+                // IMPORTANT: Unsubscribe from drag events
+                // Placed cards should never respond to corner drag events
+                if (card.Context != null)
+                {
+                    card.Context.OnDragStarted -= OnCardDragStarted;
+                }
+                
+                Logging.Debug($"[CornerCardManager] Card placed and unsubscribed from corner events: {card.CardData?.Name}");
+            }
+        }
+        
+        #region Private Helpers
+        
+        /// <summary>
+        /// Shuffle remaining cards to occupy the first available slots (0 → 1 → 2).
+        /// Example: If we have 2 cards in slots 0 and 2, move the card from slot 2 to slot 1.
+        /// </summary>
+        private void ShuffleCardsToFrontSlots()
+        {
+            if (_pendingCards.Count == 0) return;
+            
+            Logging.Debug($"[CornerCardManager] Shuffling {_pendingCards.Count} cards to front slots");
+            
+            // Reassign each card to the first N slots (0, 1, 2...)
+            for (int i = 0; i < _pendingCards.Count; i++)
+            {
+                var card = _pendingCards[i];
+                var targetSlot = FindSlotByIndex(i);
+                
+                if (targetSlot == null)
+                {
+                    Logging.Warning($"[CornerCardManager] Could not find slot with index {i} during shuffle");
+                    continue;
+                }
+                
+                // Check if card is already in the correct slot
+                if (card.CurrentSlot == targetSlot)
+                {
+                    // Already in correct slot, skip
+                    continue;
+                }
+                
+                // Vacate current slot if occupied
+                if (card.CurrentSlot != null)
+                {
+                    card.CurrentSlot.Vacate();
+                }
+                
+                // Assign to target slot with animation
+                card.AssignToSlot(targetSlot, true); // true = animate
+                Logging.Debug($"[CornerCardManager] Shuffled card {i} to slot {targetSlot.SlotIndex}");
+            }
+        }
+        
+        /// <summary>
+        /// Spawn a single card in the specified slot.
+        /// Card will be in PendingFaceDownState and match slot transform.
+        /// </summary>
+        private void SpawnCardInSlot(DraggableSlot slot)
+        {
+            if (slot == null || _cardPrefab == null) return;
+            
+            // Instantiate card as child of slot (not container)
+            GameObject cardObj = Object.Instantiate(_cardPrefab, slot.transform);
+            var card = cardObj.GetComponent<StateMachine.Card>();
+            
+            if (card == null)
+            {
+                Logging.Warning("[CornerCardManager] Card prefab missing Card component!");
+                Object.Destroy(cardObj);
+                return;
+            }
+            
+            // IMPORTANT: Assign to slot FIRST (establishes correct transform)
+            card.AssignToSlot(slot, false); // false = instant, no animation
+            
+            // Inject AlbumViewPage dependency
+            card.Context.SetAlbumViewPage(_owner);
+            
+            // THEN setup card for pending state (transitions to PendingFaceDownState)
+            // This ensures OriginalScale is captured AFTER slot assignment
+            card.SetupForAlbumPending();
+            
+            // Subscribe to drag events for reorganization
+            card.Context.OnDragStarted += OnCardDragStarted;
+            
+            // Track in list
+            _pendingCards.Add(card);
+            
+            Logging.Debug($"[CornerCardManager] Spawned card in slot {slot.SlotIndex}, state: {card.GetCurrentStateName()}");
+        }
+        
+        /// <summary>
+        /// Handle card drag started - cleanup and unparent from corner slot
+        /// Rebuild happens in GetSmartSelection after pending list is updated
+        /// </summary>
+        private void OnCardDragStarted(StateMachine.CardContext context)
+        {
+            if (context == null) return;
+            
+            var card = context.GetComponent<StateMachine.Card>();
+            if (card == null) return;
+            
+            // Only handle pending corner cards
+            if (!_pendingCards.Contains(card)) return;
+            
+            Logging.Debug($"[CornerCardManager] Card drag started, removing from corner");
+            
+            // 1. Remove from tracking (card is transitioning to placement flow)
+            _pendingCards.Remove(card);
+            
+            // 2. Unsubscribe from this card's events
+            if (card.Context != null)
+            {
+                card.Context.OnDragStarted -= OnCardDragStarted;
+            }
+            
+            // 3. CRITICAL: Unparent from corner slot BEFORE rebuild happens
+            // This prevents the card from being destroyed when CleanupAllCards runs
+            // Reparent to page's transform to keep it alive during drag
+            if (card.transform.parent != null)
+            {
+                card.transform.SetParent(_owner.transform, true); // Keep world position
+                Logging.Debug($"[CornerCardManager] Card unparented from corner slot - safe for rebuild");
+            }
+            
+            // Note: RebuildCards() is called in GetSmartSelection()
+            // after the card is removed from CardSystemManager's pending list
+            // The card is now safe from being destroyed since it's no longer a child of corner slots
+        }
+        
+        /// <summary>
+        /// Get unique pending cards (one per definition+rarity combo)
+        /// </summary>
+        private List<CardData> GetUniquePendingCards()
+        {
+            if (CardSystemManager.Instance == null) return new List<CardData>();
+            
+            var pending = CardSystemManager.Instance.GetPendingRevealCards();
+            
+            // Group by definition+rarity, take first of each group
+            var uniqueDict = new Dictionary<string, CardData>();
+            int duplicateCount = 0;
+            
+            foreach (var card in pending)
+            {
+                string key = $"{card.DefinitionId}_{card.Rarity}";
+                if (!uniqueDict.ContainsKey(key))
+                {
+                    uniqueDict[key] = card;
+                }
+                else
+                {
+                    duplicateCount++;
+                }
+            }
+            
+            if (duplicateCount > 0)
+            {
+                Logging.Warning($"[CornerCardManager] Found {duplicateCount} duplicate pending cards (same definition+rarity combo)");
+            }
+            
+            return new List<CardData>(uniqueDict.Values);
+        }
+        
+        /// <summary>
+        /// Find a slot by its SlotIndex property
+        /// </summary>
+        private DraggableSlot FindSlotByIndex(int slotIndex)
+        {
+            if (_slots == null)
+                return null;
+            
+            foreach (var slot in _slots.Slots)
+            {
+                if (slot.SlotIndex == slotIndex)
+                {
+                    return slot;
+                }
+            }
+            return null;
+        }
+        
+        #endregion
+    }
+}
+

Assets/Scripts/CardSystem/Controllers/CornerCardManager.cs.meta

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+fileFormatVersion: 2
+guid: c7c68770a6974aa4a22c645fe0517fe2
+timeCreated: 1763425113

Assets/Scripts/CardSystem/Controllers/ProgressBarController.cs

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+using System.Collections;
+using Core;
+using UnityEngine;
+using UnityEngine.UI;
+using AppleHills.Core.Settings;
+
+namespace UI.CardSystem
+{
+    /// <summary>
+    /// Controls a vertical progress bar made of individual Image elements.
+    /// Fills from bottom to top and animates the newest element with a blink effect.
+    /// 
+    /// Setup: Place on GameObject with VerticalLayoutGroup (Reverse Arrangement enabled).
+    /// First child = first progress element (1/5), last child = last progress element (5/5).
+    /// </summary>
+    public class ProgressBarController : MonoBehaviour
+    {
+        [Header("Progress Elements")]
+        [Tooltip("The individual Image components representing progress segments (auto-detected from children)")]
+        private Image[] _progressElements;
+        
+        private ICardSystemSettings _settings;
+        private Coroutine _currentBlinkCoroutine;
+        
+        private void Awake()
+        {
+            _settings = GameManager.GetSettingsObject<ICardSystemSettings>();
+            
+            // Auto-detect all child Image components
+            _progressElements = GetComponentsInChildren<Image>(true);
+            
+            if (_progressElements.Length == 0)
+            {
+                Logging.Warning("[ProgressBarController] No child Image components found! Add Image children to this GridLayout.");
+            }
+        }
+        
+        /// <summary>
+        /// Show progress and animate the newest element with a blink effect.
+        /// </summary>
+        /// <param name="currentCount">Current progress (1 to maxCount)</param>
+        /// <param name="maxCount">Maximum progress value (typically 5)</param>
+        /// <param name="onComplete">Callback invoked after blink animation completes</param>
+        public void ShowProgress(int currentCount, int maxCount, System.Action onComplete)
+        {
+            // Validate input
+            if (currentCount < 0 || currentCount > maxCount)
+            {
+                Logging.Warning($"[ProgressBarController] Invalid progress: {currentCount}/{maxCount}");
+                onComplete?.Invoke();
+                return;
+            }
+            
+            // Validate element count
+            if (_progressElements.Length < maxCount)
+            {
+                Logging.Warning($"[ProgressBarController] Not enough progress elements! Expected {maxCount}, found {_progressElements.Length}");
+                onComplete?.Invoke();
+                return;
+            }
+            
+            // Stop any existing blink animation
+            if (_currentBlinkCoroutine != null)
+            {
+                StopCoroutine(_currentBlinkCoroutine);
+                _currentBlinkCoroutine = null;
+            }
+            
+            // Disable all elements first
+            foreach (var element in _progressElements)
+            {
+                element.enabled = false;
+            }
+            
+            // Enable first N elements (since first child = 1/5, last child = 5/5)
+            // If currentCount = 3, enable elements [0], [1], [2] (first 3 elements)
+            for (int i = 0; i < currentCount && i < _progressElements.Length; i++)
+            {
+                _progressElements[i].enabled = true;
+            }
+            
+            Logging.Debug($"[ProgressBarController] Showing progress {currentCount}/{maxCount}");
+            
+            // Blink the NEWEST element (the last one we just enabled)
+            // Newest element is at index (currentCount - 1)
+            int newestIndex = currentCount - 1;
+            if (newestIndex >= 0 && newestIndex < _progressElements.Length && currentCount > 0)
+            {
+                _currentBlinkCoroutine = StartCoroutine(BlinkElement(newestIndex, onComplete));
+            }
+            else
+            {
+                // No element to blink (e.g., currentCount = 0)
+                onComplete?.Invoke();
+            }
+        }
+        
+        /// <summary>
+        /// Show progress without blink animation (instant display).
+        /// </summary>
+        /// <param name="currentCount">Current progress (1 to maxCount)</param>
+        /// <param name="maxCount">Maximum progress value</param>
+        public void ShowProgressInstant(int currentCount, int maxCount)
+        {
+            // Validate
+            if (currentCount < 0 || currentCount > maxCount || _progressElements.Length < maxCount)
+            {
+                return;
+            }
+            
+            // Disable all
+            foreach (var element in _progressElements)
+            {
+                element.enabled = false;
+            }
+            
+            // Enable first N elements
+            for (int i = 0; i < currentCount && i < _progressElements.Length; i++)
+            {
+                _progressElements[i].enabled = true;
+            }
+        }
+        
+        /// <summary>
+        /// Hide all progress elements.
+        /// </summary>
+        public void HideProgress()
+        {
+            foreach (var element in _progressElements)
+            {
+                element.enabled = false;
+            }
+        }
+        
+        /// <summary>
+        /// Blink a specific element by toggling enabled/disabled.
+        /// </summary>
+        private IEnumerator BlinkElement(int index, System.Action onComplete)
+        {
+            if (index < 0 || index >= _progressElements.Length)
+            {
+                onComplete?.Invoke();
+                yield break;
+            }
+            
+            Image element = _progressElements[index];
+            
+            // Get blink settings (or use defaults if not available)
+            float blinkDuration = 0.15f; // Duration for each on/off toggle
+            int blinkCount = 3; // Number of full blinks (on->off->on = 1 blink)
+            
+            // Try to get settings if available
+            if (_settings != null)
+            {
+                // Settings could expose these if needed:
+                // blinkDuration = _settings.ProgressBlinkDuration;
+                // blinkCount = _settings.ProgressBlinkCount;
+            }
+            
+            Logging.Debug($"[ProgressBarController] Blinking element {index} ({blinkCount} times)");
+            
+            // Wait a brief moment before starting blink
+            yield return new WaitForSeconds(0.3f);
+            
+            // Perform blinks (on->off->on = 1 full blink)
+            for (int i = 0; i < blinkCount; i++)
+            {
+                // Off
+                element.enabled = false;
+                yield return new WaitForSeconds(blinkDuration);
+                
+                // On
+                element.enabled = true;
+                yield return new WaitForSeconds(blinkDuration);
+            }
+            
+            // Ensure element is enabled at the end
+            element.enabled = true;
+            
+            Logging.Debug($"[ProgressBarController] Blink complete for element {index}");
+            
+            _currentBlinkCoroutine = null;
+            onComplete?.Invoke();
+        }
+        
+        /// <summary>
+        /// Get the total number of progress elements available.
+        /// </summary>
+        public int GetElementCount()
+        {
+            return _progressElements?.Length ?? 0;
+        }
+        
+        private void OnDestroy()
+        {
+            // Clean up any running coroutines
+            if (_currentBlinkCoroutine != null)
+            {
+                StopCoroutine(_currentBlinkCoroutine);
+                _currentBlinkCoroutine = null;
+            }
+        }
+    }
+}
+

Assets/Scripts/CardSystem/Controllers/ProgressBarController.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: e91de41001c14101b8fa4216d6c7888b
+timeCreated: 1762939781