Fix Task6: Add missing calcDamage import to SpireTab.tsx

- Added missing calcDamage import from @/lib/game/store
- Fixed TypeScript error in SpireTab.tsx related to calcDamage

src/app/page.tsx

@@ -272,7 +272,7 @@ export default function ManaLoopGame() {
                       disabled={store.isDescending}
                     >
                       <ChevronDown className="w-4 h-4 mr-2" />
-                      {store.isDescending ? 'Descending' : 
+                      {store.isDescending ? 'Descending…' : 
                        store.climbDirection === 'up' ? 'Climbing' : 
                        'Begin Descent'}
                     </Button>

src/components/game/tabs/SpireTab.tsx

@@ -12,7 +12,7 @@ import type { ActivityLogEntry } from '@/lib/game/types';
 import type { GameStore } from '@/lib/game/store';
 import { ELEMENTS, GUARDIANS, SPELLS_DEF, SKILLS_DEF, ROOM_TYPE_LABELS } from '@/lib/game/constants';
 import { GOLEMS_DEF, getGolemDamage, getGolemAttackSpeed } from '@/lib/game/data/golems';
-import { fmt, fmtDec, getFloorElement, canAffordSpellCost, getEnemyName } from '@/lib/game/store';
+import { fmt, fmtDec, getFloorElement, canAffordSpellCost, getEnemyName, calcDamage } from '@/lib/game/store';
 import { getActiveEquipmentSpells, getTotalDPS } from '@/lib/game/computed-stats';
 import { formatSpellCost, getSpellCostColor, formatStudyTime } from '@/lib/game/formatting';
 import { CraftingProgress, StudyProgress } from '@/components/game';