cleanup: delete computed-stats.ts shim and store/index.ts

- Delete src/lib/game/computed-stats.ts (root-level re-export shim)
- Delete src/lib/game/store/index.ts (nothing imports from it)
- Update __tests__/computed-stats.test.ts to import from ../utils instead
- Clean up craftingStore.ts imports (remove unused useGameStore, CraftingApply)

Typecheck and lint pass (pre-existing DisciplinesTab.tsx errors unchanged)

src/components/game/crafting/EnchantmentDesigner.tsx

@@ -23,7 +23,6 @@ import {
   removeEffectFromDesign,
 } from './EnchantmentDesigner/utils';
 import { useCraftingStore } from '@/lib/game/stores';
-import { useSkillStore } from '@/lib/game/stores';
 
 export function EnchantmentDesigner({
   selectedEquipmentType,
@@ -44,15 +43,8 @@ export function EnchantmentDesigner({
   const unlockedEffects = useCraftingStore((s) => s.unlockedEffects);
   const equipmentInstances = useCraftingStore((s) => s.equipmentInstances);
 
-  // Skill store selectors
-  const skills = useSkillStore((s) => s.skills);
-  const skillUpgrades = useSkillStore((s) => s.skillUpgrades);
-
-  const enchantingLevel = skills?.enchanting || 0;
-  const efficiencyBonus = (skillUpgrades?.['efficientEnchant'] || []).length * 0.05 || 0;
-
   // Calculate total capacity cost for current design
-  const designCapacityCost = calculateDesignCapacityCost(selectedEffects, efficiencyBonus);
+  const designCapacityCost = calculateDesignCapacityCost(selectedEffects, 0);
 
   // Get capacity limit for selected equipment type
   const selectedEquipmentCapacity = getEquipmentCapacity(selectedEquipmentType);
@@ -62,7 +54,7 @@ export function EnchantmentDesigner({
 
   // Add effect to design
   const addEffect = (effectId: string) => {
-    addEffectToDesign(effectId, selectedEffects, efficiencyBonus, setSelectedEffects);
+    addEffectToDesign(effectId, selectedEffects, 0, setSelectedEffects);
   };
 
   // Remove effect from design
@@ -117,8 +109,8 @@ export function EnchantmentDesigner({
           setSelectedEffects={setSelectedEffects}
           availableEffects={availableEffects}
           incompatibleEffects={incompatibleEffects}
-          enchantingLevel={enchantingLevel}
-          efficiencyBonus={efficiencyBonus}
+          enchantingLevel={0}
+          efficiencyBonus={0}
           designProgress={designProgress}
           addEffect={addEffect}
           removeEffect={removeEffect}