Basic Lands Handling

Requirements

Upon draft room creation, basic lands from the selected sets must be cached and loaded.
During deck building, players must have access to an infinite number of these basic lands matching the selected sets.

Pack Generation: Updated /api/packs/generate to extract unique basic lands from the processed card pool and return them in the response: { packs, basicLands }.
Room Management: Updated RoomManager and Room interface to store basicLands array.
Socket Events: Updated create_room event handler to accept basicLands and pass them to the room creation logic.

State Management: Added availableLands state to App.tsx with local storage persistence to persist lands between generation and lobby creation.
Cube Manager: Updated handleGenerate to parse the new API response and update specific state.
Lobby Manager:
- Enhanced handleCreateRoom to include basic lands in the server-side image caching request.
- Updated create_room socket emission to send the basic lands to the server.
Deck Builder:
- Added a "Land Station" UI component.
- If specific basic lands are available, it displays a horizontal scrollable gallery of the unique land arts.
- Clicking a land adds a unique copy (with a specific ID) to the deck, allowing for infinite copies.
- Preserved fallback to generic land counters if no specific lands are available.

Verified flow from pack generation -> lobby -> room -> deck builder.
Validated that lands are deduplicated by Scryfall ID to ensure unique arts are offered.