fix: resolve enchanting spec vs code discrepancies (issue #324)

- D2: Move spell_iceShard to basic-spells.ts at cost 75 (canonical), remove duplicate from frost-spells.ts
- D7: disenchantEquipment now adds 'Ready for Enchantment' tag and resets rarity to 'common'
- D8: disenchantEquipment now credits recovered mana to raw mana pool
- D14: Wire enchantPower stat from discipline effects into efficiencyBonus via new getEnchantingEfficiencyBonus() helper
- D3: Fix spec file reference from crafting-attunements.ts to data/attunements.ts
- D1/D6: Add missing metalSpellFocus to spec capacity table

src/lib/game/stores/craftingStore.ts

@@ -9,6 +9,7 @@ import { useManaStore } from './manaStore';
 import { useCombatStore } from './combatStore';
 
 import { useUIStore } from './uiStore';
+import { getEnchantingEfficiencyBonus } from '../effects/discipline-effects';
 import * as ApplicationActions from '../crafting-actions/application-actions';
 import * as PreparationActions from '../crafting-actions/preparation-actions';
 import { equipItem as equipItemAction, unequipItem as unequipItemAction } from '../crafting-actions/equipment-actions';
@@ -36,6 +37,7 @@ export const useCraftingStore = create<CraftingStore>()(
         // Enchantment design actions
         startDesigningEnchantment: (name, equipmentTypeId, effects) => {
           const state = get(); // crafting state
+          const efficiencyBonus = getEnchantingEfficiencyBonus();
 
           const validation = CraftingDesign.validateDesignEffects(effects, equipmentTypeId, 0, state.unlockedEffects);
           if (!validation.valid) return false;
@@ -43,7 +45,7 @@ export const useCraftingStore = create<CraftingStore>()(
           const equipType = CraftingUtils.getEquipmentType(equipmentTypeId);
           if (!equipType) return false;
 
-          const totalCapacityCost = CraftingDesign.calculateDesignCapacityCost(effects, 0);
+          const totalCapacityCost = CraftingDesign.calculateDesignCapacityCost(effects, efficiencyBonus);
 
           if (totalCapacityCost > equipType.baseCapacity) return false;