fix: resolve 7 medium-priority bugs from audit #372

- #371: Replace Math.random() with seeded PRNG in getSpireEnemyArmor/Barrier
- #370: Add mana refund when cancelling pact ritual in cancelPactRitual
- #367: Add ENCHANT_MASTERY check for design slot 2 in crafting store
- #364: Fix useGameDerived to read crafting data from useCraftingStore
- #363: Clamp recovery room regen delta to prevent negative mana loss
- #365: Add shield/barrier/healthRegen fields to all procedural guardians
- #362: Refactor enchanting tick pipeline to return writes instead of direct store calls

Extracted procedural guardian generators into guardian-procedural.ts to stay under 400-line limit.

All 1158 tests pass.

src/lib/game/hooks/useGameDerived.ts

@@ -3,6 +3,7 @@
 
 import { useMemo } from 'react';
 import { useGameStore } from '../stores/gameStore';
+import { useCraftingStore } from '../stores/craftingStore';
 import { useManaStore } from '../stores/manaStore';
 import { useCombatStore } from '../stores/combatStore';
 import { usePrestigeStore } from '../stores/prestigeStore';
@@ -122,8 +123,8 @@ export function useCombatStats() {
   const currentFloor = useCombatStore((s) => s.currentFloor);
   const activeSpell = useCombatStore((s) => s.activeSpell);
   const { upgradeEffects } = useManaStats();
-  const equipmentInstances = useGameStore((s) => s.crafting.equipmentInstances);
-  const equippedInstances = useGameStore((s) => s.crafting.equippedInstances);
+  const equipmentInstances = useCraftingStore((s) => s.equipmentInstances);
+  const equippedInstances = useCraftingStore((s) => s.equippedInstances);
 
   const floorElem = useMemo(
     () => getFloorElement(currentFloor),