Implement CollectionController for managing card collection UI, including search, filter, sort, paginImplements all tasks in #50:
- Infinite scroll card grid using CardPrefab instances with object pooling
- Async Scryfall card image loading via ImageCache.GetSprite()
- Search bar wired to GET /api/collection?search=...
- Filter sidebar: color, type, set, rarity, owned/missing dropdowns
- Sort dropdown: name, CMC, color, type, price
- Card detail panel with flip animation trigger and full card view
- "Add to Deck" button routes to DeckBuilder with card stored in PlayerPrefs
- Pagination / load-more button with page info label
- Mobile: filter drawer auto-hides on narrow screens, collapsible via toggle buttonation, and card detail display.
This file defines the DeckGenResponse class and its associated GeneratedDeckCard class, which map to the response structure from the /api/deckgen/v3 endpoint.
KoalaTrapLord