feat: Implement deck builder magnified card view, land advice, basic land integration, and unlimited time for deck construction.

docs/development/devlog/2025-12-17-153300_basic_lands_handling.md

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+# 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.
+
+## Implementation Details
+
+### Server-Side
+- **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.
+
+### Client-Side
+- **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.
+
+## Verification
+- Verified flow from pack generation -> lobby -> room -> deck builder.
+- Validated that lands are deduplicated by Scryfall ID to ensure unique arts are offered.