fix: add Critical Chance display to Stats tab Combat Stats section

src/components/game/tabs/StatsTab.tsx

@@ -37,6 +37,8 @@ export function StatsTab() {
       <CombatStatsSection
         activeSpellDef={combatStats.activeSpellDef}
         pactMultiplier={combatStats.pactMultiplier}
+        critChance={combatStats.critChance}
+        critDamage={combatStats.critDamage}
       />
       <PactStatusSection
         pactMultiplier={combatStats.pactMultiplier}

src/components/game/tabs/StatsTab/CombatStatsSection.tsx

@@ -9,9 +9,11 @@ import type { SpellDef } from '@/lib/game/types';
 interface CombatStatsSectionProps {
   activeSpellDef: SpellDef | null;
   pactMultiplier: number;
+  critChance: number;
+  critDamage: number;
 }
 
-export function CombatStatsSection({ activeSpellDef, pactMultiplier }: CombatStatsSectionProps) {
+export function CombatStatsSection({ activeSpellDef, pactMultiplier, critChance, critDamage }: CombatStatsSectionProps) {
   return (
     <DebugName name="CombatStatsSection">
     <Card className="bg-[var(--bg-panel)] border-[var(--border-subtle)]">
@@ -38,9 +40,13 @@ export function CombatStatsSection({ activeSpellDef, pactMultiplier }: CombatSta
             </div>
           </div>
           <div className="space-y-2">
+            <div className="flex justify-between text-sm">
+              <span style={{ color: 'var(--text-muted)' }}>Critical Chance:</span>
+              <span style={{ color: 'var(--mana-light)' }}>{fmtDec(critChance * 100, 1)}%</span>
+            </div>
             <div className="flex justify-between text-sm">
               <span style={{ color: 'var(--text-muted)' }}>Critical Multiplier:</span>
-              <span style={{ color: 'var(--mana-light)' }}>1.5x</span>
+              <span style={{ color: 'var(--mana-light)' }}>{fmtDec(critDamage, 2)}x</span>
             </div>
           </div>
         </div>

src/lib/game/hooks/useGameDerived.ts

@@ -17,7 +17,9 @@ import {
   getFloorElement,
   calcDamage,
   getElementalBonus,
+  getBoonBonuses,
 } from '../utils';
+import { computeEquipmentEffects } from '../effects';
 import { computePactMultiplier, computePactInsightMultiplier } from '../utils/pact-utils';
 
 import { ELEMENTS, SPELLS_DEF, getStudySpeedMultiplier, getStudyCostMultiplier, HOURS_PER_TICK, TICK_MS } from '../constants';
@@ -120,6 +122,8 @@ 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 floorElem = useMemo(
     () => getFloorElement(currentFloor),
@@ -209,6 +213,22 @@ export function useCombatStats() {
     };
   }, [activeSpellDef, signedPacts, activeSpell, floorElem, isGuardianFloor, pactMultiplier]);
 
+  // Crit chance: sum equipment bonus (decimal) + pact boon bonus (percentage points) + upgrade bonus (decimal)
+  const critChance = useMemo(() => {
+    const equipEffects = computeEquipmentEffects(equipmentInstances, equippedInstances);
+    const equipCritBonus = equipEffects.bonuses.critChance || 0;
+    const boons = getBoonBonuses(signedPacts);
+    const boonCritChance = boons.critChance / 100; // Convert percentage points to decimal
+    const upgradeCritBonus = upgradeEffects.critChanceBonus || 0;
+    return equipCritBonus + boonCritChance + upgradeCritBonus;
+  }, [equipmentInstances, equippedInstances, signedPacts, upgradeEffects.critChanceBonus]);
+
+  // Crit damage: base multiplier (1.5) + pact boon bonus (percentage points)
+  const critDamage = useMemo(() => {
+    const boons = getBoonBonuses(signedPacts);
+    return (upgradeEffects.critDamageMultiplier || 1.5) + boons.critDamage / 100;
+  }, [signedPacts, upgradeEffects.critDamageMultiplier]);
+
   return {
     floorElem,
     floorElemDef,
@@ -219,6 +239,8 @@ export function useCombatStats() {
     pactInsightMultiplier,
     dps,
     damageBreakdown,
+    critChance,
+    critDamage,
   };
 }