Fix Spire Mode floor rendering and swarm floors (Tasks 5 & 6)

- Added enemy naming system with getEnemyName() function
- Updated EnemyState type to include name field
- Updated generateSwarmEnemies() and generateFloorState() to assign enemy names
- Fixed SpireTab.tsx (both versions) to display:
  - Floor type (Combat/Swarm/Speed/Guardian/Puzzle) with icons
  - Named enemies based on element and floor tier
  - Special floor properties (armor %, dodge chance)
  - Multiple enemies for swarm floors with individual HP bars
- Added ROOM_TYPE_LABELS to constants for display
- Verified floor type generation logic works correctly
- Build succeeds with npm run build

src/components/game/tabs/SpellsTab.tsx

@@ -32,7 +32,7 @@ export function SpellsTab({ store }: SpellsTabProps) {
     if (!instance) continue;
     
     for (const ench of instance.enchantments) {
-      const effectDef = ENCHANTMENT_EFFECTS[ench.effectId];
+      const effectDef = ENCHANTMENT_EFFECTS?.[ench.effectId];
       if (effectDef?.effect.type === 'spell' && effectDef.effect.spellId) {
         const spellId = effectDef.effect.spellId;
         if (!equipmentSpellIds.includes(spellId)) {
@@ -48,7 +48,7 @@ export function SpellsTab({ store }: SpellsTabProps) {
   
   const canCastSpell = (spellId: string): boolean => {
     const spell = SPELLS_DEF[spellId];
-    if (!spell) return false;
+    if (!spell || !spell.cost) return false;
     return canAffordSpellCost(spell.cost, store.rawMana, store.elements);
   };