refactor: remove legacy store.ts and crafting-slice.ts, complete modular store migration

- Delete store.ts (355 LOC monolithic store, zero imports)
- Delete crafting-slice.ts (379 LOC legacy crafting module)
- Inline createStartingEquipment() into craftingStore.ts
- Remove legacy equipment/inventory fields from GameState
- Remove EquipmentDef from game.ts imports (unused)
- Fix duplicate EquipmentSpellState export in types.ts
- Fix bluePrintId typo in craftingStore.ts
- Update stores/index.ts to import CraftingState/CraftingActions from craftingStore.types
- Update EquipmentTab.test.ts to test store state instead of deleted module
- Clean up stale comments referencing crafting-slice.ts
- Reduce TS errors from 83 to 72 by removing conflicting legacy types

docs/circular-deps.txt

@@ -1,10 +1,8 @@
 # Circular Dependencies
-Generated: 2026-05-20T07:28:09.937Z
-Found: 3 circular chain(s) — these MUST be fixed before modifying involved files.
+Generated: 2026-05-20T10:00:51.281Z
+Found: 1 circular chain(s) — these MUST be fixed before modifying involved files.
 
-1. Processed 125 files (1.3s) (4 warnings)
-2. 1) data/equipment/index.ts > data/equipment/utils.ts
-3. 2) data/golems/index.ts > data/golems/utils.ts
+1. Processed 127 files (1.4s) (4 warnings)
 
 ## How to fix
 1. Identify which import in the chain can be extracted to a shared types/utils file.