feat: Implement new pack generation algorithm, enhance card metadata, and add IndexedDB persistence.

docs/development/devlog/2025-12-16-224000_pack_generation_update.md

@@ -0,0 +1,30 @@
+# Pack Generation Algorithm Update
+
+## Objective
+Update the pack generation logic to match a new 15-slot "Play Booster" structure.
+The new structure includes:
+- **Slots 1-6:** Commons (Color Balanced).
+- **Slot 7:** Common (87%), List (C/U 10%, R/M 2%), or Special Guest (1%).
+- **Slots 8-10:** Uncommons (3).
+- **Slot 11:** Rare (7/8) or Mythic (1/8).
+- **Slot 12:** Basic Land or Common Dual Land (20% Foil).
+- **Slot 13:** Wildcard (Non-Foil) - Weighted Rarity.
+- **Slot 14:** Wildcard (Foil) - Weighted Rarity.
+- **Slot 15:** Marketing Token / Art Card.
+
+## Implementation Details
+1.  **Updated `PackGeneratorService.ts`**:
+    -   Modified `processedPools` to explicitly categorize `lands` (Basic + Common Dual) and `tokens`.
+    -   Updated `processCards` to sort cards into these new pools (instead of filtering them out completely).
+    -   Rewrote `buildSinglePack` (for `standard` rarity mode) to implement the 15-slot sequencing.
+    -   Implemented logic for:
+        -   Color balancing commons (naive attempt).
+        -   "The List" simulation (using Wildcard logic from pools).
+        -   Slots 13/14 Wildcards with weighted probabilities.
+        -   Foil application (cloning card and setting `finish`).
+        -   Slot 12 Land selection (preferring separate land pool).
+    -   Added interfaces for `typeLine` and `layout` to `DraftCard`.
+
+## Status
+-   Implemented and Verified via static check (TS linting was fixed).
+-   Ready for testing in the client.