fix: use computePartyCombatPower in quest panel for consistent CP display

The quest panel was computing party combat power with a simplified
hand-rolled loop (base combatPower × count only) that did not account for
upgrade multipliers, prestige bonus, equipment set bonuses, echo or
crafted multipliers, or the active companion bonus.

This meant the displayed "you have X combat power" value diverged from
the value used by the auto-quest engine (computePartyCombatPower), which
could show the player an incorrect picture of whether a quest was
startable — particularly after upgrades or equipment began boosting
combat power.

Replacing the loop with computePartyCombatPower(state) makes the quest
card display fully consistent with the auto-quest eligibility check.

Closes #157

apps/web/src/components/game/questPanel.tsx

@@ -11,7 +11,10 @@
 /* eslint-disable max-statements -- Many local variables needed for quest state */
 import { useState, type JSX } from "react";
 import { useGame } from "../../context/gameContext.js";
-import { zoneFailureChance } from "../../engine/tick.js";
+import {
+  computePartyCombatPower,
+  zoneFailureChance,
+} from "../../engine/tick.js";
 import { cdnImage } from "../../utils/cdn.js";
 import { LockToggle } from "../ui/lockToggle.js";
 import { ZoneSelector } from "./zoneSelector.js";
@@ -208,7 +211,7 @@ const QuestPanel = (): JSX.Element => {
     );
   }
 
-  const { adventurers, autoQuest, bosses, quests, zones } = state;
+  const { autoQuest, bosses, quests, zones } = state;
 
   const activeZone = zones.find((zone) => {
     return zone.id === activeZoneId;
@@ -226,11 +229,7 @@ const QuestPanel = (): JSX.Element => {
     : quests.find((quest) => {
       return quest.id === activeZone.unlockQuestId;
     });
-  let partyCombatPower = 0;
-  for (const adventurer of adventurers) {
-    const contribution = adventurer.combatPower * adventurer.count;
-    partyCombatPower = partyCombatPower + contribution;
-  }
+  const partyCombatPower = computePartyCombatPower(state);
   const zoneQuests = quests.filter(({ zoneId }) => {
     return zoneId === activeZoneId;
   });