- **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- Identified unused `SlotContainerHelper.cs` (superseded by `CornerCardManager`)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
