fix: resolve auto-boss signature mismatch, expose full CP, cap auto-buy, show unlock hints

Closes #148: clear stale signature after each boss fight so subsequent
auto-boss pre-saves don't send a mismatched HMAC.

Closes #151: auto-buy skips non-max-tier adventurers once they reach 100,
keeping gold flowing to the highest-unlocked tier.

Closes #152: introduce computePartyCombatPower() in tick.ts mirroring the
server-side formula (global upgrades, prestige, equipment, set bonuses,
echo, crafted, companion). Resource bar, auto-quest gate, and boss panel
all now use the same multiplier-accurate value.

Closes #146: tick engine auto-unlocks adventurer-specific upgrades when
their adventurer is first recruited; upgrade panel shows a recruit hint
for locked entries with no boss/quest source.

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

@@ -11,10 +11,11 @@
 /* eslint-disable max-lines -- Boss panel with sub-component and helper function */
 import { type JSX, useState } from "react";
 import { useGame } from "../../context/gameContext.js";
+import { computePartyCombatPower } from "../../engine/tick.js";
 import { cdnImage } from "../../utils/cdn.js";
 import { LockToggle } from "../ui/lockToggle.js";
 import { ZoneSelector } from "./zoneSelector.js";
-import type { Boss, GameState } from "@elysium/types";
+import type { Boss } from "@elysium/types";
 
 interface BossCardProperties {
   readonly boss:          Boss;
@@ -157,72 +158,6 @@ const BossCard = ({
   );
 };
 
-/**
- * Computes party DPS and HP from the current game state.
- * @param state - The full game state.
- * @returns The computed party DPS and HP values.
- */
-const computePartyStats = (
-  state: GameState,
-): {
-  partyDps: number;
-  partyHp:  number;
-} => {
-  const { upgrades, adventurers, equipment, prestige } = state;
-  let globalMultiplier = 1;
-  for (const upgrade of upgrades) {
-    const { purchased, target, multiplier } = upgrade;
-    if (purchased && target === "global") {
-      globalMultiplier = globalMultiplier * multiplier;
-    }
-  }
-  const prestigeBonus = prestige.count * 0.1;
-  const prestigeMultiplier = 1 + prestigeBonus;
-  const equipmentCombatMultiplier = equipment.
-    filter((item) => {
-      return item.equipped && item.bonus.combatMultiplier !== undefined;
-    }).
-    reduce((multiplier, item) => {
-      return multiplier * (item.bonus.combatMultiplier ?? 1);
-    }, 1);
-
-  let partyDps = 0;
-  let partyHp = 0;
-  for (const adventurer of adventurers) {
-    const { count, id: adventurerId, combatPower, level } = adventurer;
-    if (count === 0) {
-      continue;
-    }
-    let adventurerMultiplier = 1;
-    for (const upgrade of upgrades) {
-      const {
-        purchased,
-        target,
-        multiplier,
-        adventurerId: upgradeAdventurerId,
-      } = upgrade;
-      if (
-        purchased
-        && target === "adventurer"
-        && upgradeAdventurerId === adventurerId
-      ) {
-        adventurerMultiplier = adventurerMultiplier * multiplier;
-      }
-    }
-    const dps
-      = combatPower
-      * count
-      * adventurerMultiplier
-      * globalMultiplier
-      * prestigeMultiplier;
-    partyDps = partyDps + dps;
-    const hp = level * 50 * count;
-    partyHp = partyHp + hp;
-  }
-  partyDps = partyDps * equipmentCombatMultiplier;
-  return { partyDps, partyHp };
-};
-
 /**
  * Renders the boss panel with zone selection and boss list.
  * @returns The JSX element.
@@ -266,7 +201,14 @@ const BossPanel = (): JSX.Element => {
     void handleChallenge(bossId);
   }
 
-  const { zones, bosses, quests, autoBoss, prestige: playerPrestige } = state;
+  const {
+    adventurers,
+    autoBoss,
+    bosses,
+    prestige: playerPrestige,
+    quests,
+    zones,
+  } = state;
 
   const activeZone = zones.find((zone) => {
     return zone.id === activeZoneId;
@@ -349,7 +291,12 @@ const BossPanel = (): JSX.Element => {
   }
 
   const autoBossOn = autoBoss === true;
-  const { partyDps, partyHp } = computePartyStats(state);
+  const partyDps = computePartyCombatPower(state);
+  let partyHp = 0;
+  for (const { level, count } of adventurers) {
+    // eslint-disable-next-line stylistic/no-mixed-operators -- level * 50 * count is clear
+    partyHp = partyHp + level * 50 * count;
+  }
   const { count: prestigeCount } = playerPrestige;
 
   return (

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

@@ -7,6 +7,8 @@
 /* eslint-disable react/no-multi-comp -- Sub-component is tightly coupled to the panel */
 /* eslint-disable max-lines-per-function -- Complex component with many render paths */
 /* eslint-disable complexity -- UpgradeCard has many conditional render paths for states */
+/* eslint-disable max-statements -- UpgradePanel builds hints from three sources */
+/* eslint-disable max-lines -- Upgrade panel with sub-component exceeds line limit */
 import { type JSX, useState } from "react";
 import { useGame } from "../../context/gameContext.js";
 import { cdnImage } from "../../utils/cdn.js";
@@ -238,6 +240,22 @@ const UpgradePanel = (): JSX.Element => {
       }
     }
   }
+  for (const upgrade of locked) {
+    if (
+      !upgradeUnlockHints.has(upgrade.id)
+      && upgrade.adventurerId !== undefined
+    ) {
+      const adventurerForHint = adventurers.find((a) => {
+        return a.id === upgrade.adventurerId;
+      });
+      if (adventurerForHint !== undefined) {
+        upgradeUnlockHints.set(
+          upgrade.id,
+          `🗡️ Recruit: ${adventurerForHint.name}`,
+        );
+      }
+    }
+  }
 
   function handleToggle(): void {
     setShowLocked((current) => {

apps/web/src/components/ui/resourceBar.tsx

@@ -14,6 +14,7 @@ import {
   RESOURCE_CAP,
   computeEssencePerSecond,
   computeGoldPerSecond,
+  computePartyCombatPower,
 } from "../../engine/tick.js";
 import type { Resource } from "@elysium/types";
 
@@ -89,10 +90,7 @@ const ResourceBar = ({
   let goldPerSecond = 0;
   let essencePerSecond = 0;
   if (state !== null) {
-    for (const adventurer of state.adventurers) {
+    partyCombatPower = computePartyCombatPower(state);
-      const contribution = adventurer.combatPower * adventurer.count;
-      partyCombatPower = partyCombatPower + contribution;
-    }
     goldPerSecond = computeGoldPerSecond(state);
     essencePerSecond = computeEssencePerSecond(state);
   }

apps/web/src/context/gameContext.tsx

@@ -58,6 +58,7 @@ import {
   RESOURCE_CAP,
   applyTick,
   calculateClickPower,
+  computePartyCombatPower,
 } from "../engine/tick.js";
 import { updateChallengeProgress } from "../utils/dailyChallenges.js";
 import { formatNumber as formatNumberUtil } from "../utils/format.js";
@@ -1078,11 +1079,7 @@ export const GameProvider = ({
             return q.status === "active";
           });
           if (!hasActiveQuest) {
-            // eslint-disable-next-line unicorn/no-array-reduce -- Need the total!
+            const partyCombatPower = computePartyCombatPower(next);
-            const partyCombatPower = next.adventurers.reduce((total, a) => {
-              const power = total + a.combatPower;
-              return power * a.count;
-            }, 0);
             const zoneOrder = new Map(
               next.zones.map((z, index) => {
                 return [ z.id, index ];
@@ -1120,11 +1117,28 @@ export const GameProvider = ({
           next.autoAdventurer === true
           && next.prestige.purchasedUpgradeIds.includes("auto_adventurer")
         ) {
+          const maxAdventurerLevel = Math.max(
+            ...next.adventurers.
+              filter((a) => {
+                return a.unlocked;
+              }).
+              map((a) => {
+                return a.level;
+              }),
+          );
+          const autoBuyCap = 100;
           const [ bestAdventurer ] = next.adventurers.
             filter((adventurer) => {
               const cost
                 = adventurer.baseCost * Math.pow(1.15, adventurer.count);
-              return adventurer.unlocked && next.resources.gold >= cost;
+              const isMaxTier = adventurer.level === maxAdventurerLevel;
+              const withinCap
+                = isMaxTier || adventurer.count < autoBuyCap;
+              return (
+                adventurer.unlocked
+                && next.resources.gold >= cost
+                && withinCap
+              );
             }).
             sort((adventurerA, adventurerB) => {
               return adventurerB.level - adventurerA.level;
@@ -1346,6 +1360,13 @@ export const GameProvider = ({
                 }
                 return afterBoss;
               });
+
+              /*
+               * Boss fight modifies server state; clear stale signature so
+               * the next pre-save or auto-save does not send a mismatched one.
+               */
+              signatureReference.current = null;
+              localStorage.removeItem("elysium_save_signature");
               setAutoBossLastResult({
                 at:       Date.now(),
                 bossName: bossName,

apps/web/src/engine/tick.ts

@@ -243,6 +243,90 @@ export const computeEssencePerSecond = (state: GameState): number => {
   return essencePerSecond;
 };
 
+/**
+ * Computes the party's total combat power, applying all active multipliers
+ * (upgrades, prestige, equipment, set bonuses, echo, crafted, companion).
+ * This mirrors the server-side calculatePartyStats in boss.ts.
+ * @param state - The current game state.
+ * @returns The total party combat power.
+ */
+export const computePartyCombatPower = (state: GameState): number => {
+  let globalMultiplier = 1;
+  for (const upgrade of state.upgrades) {
+    if (upgrade.purchased && upgrade.target === "global") {
+      globalMultiplier = globalMultiplier * upgrade.multiplier;
+    }
+  }
+
+  // eslint-disable-next-line stylistic/no-mixed-operators -- prestige count * factor is clear
+  const prestigeMultiplier = 1 + state.prestige.count * 0.1;
+
+  const equipmentCombatMultiplier = state.equipment.
+    filter((item) => {
+      return item.equipped && item.bonus.combatMultiplier !== undefined;
+    }).
+    reduce((mult, item) => {
+      return mult * (item.bonus.combatMultiplier ?? 1);
+    }, 1);
+
+  const equippedItemIds = state.equipment.
+    filter((item) => {
+      return item.equipped;
+    }).
+    map((item) => {
+      return item.id;
+    });
+  const { combatMultiplier: setCombatMultiplier } = computeSetBonuses(
+    equippedItemIds,
+    EQUIPMENT_SETS,
+  );
+
+  const echoCombatMultiplier
+    = state.transcendence?.echoCombatMultiplier ?? 1;
+  const craftedCombatMultiplier
+    = state.exploration?.craftedCombatMultiplier ?? 1;
+
+  const companionBonus = getActiveCompanionBonus(
+    state.companions?.activeCompanionId,
+    state.companions?.unlockedCompanionIds ?? [],
+  );
+  const companionCombatMult
+    = companionBonus?.type === "bossDamage"
+      ? 1 + companionBonus.value
+      : 1;
+
+  let partyCombatPower = 0;
+  for (const adventurer of state.adventurers) {
+    if (adventurer.count === 0) {
+      continue;
+    }
+    let adventurerMultiplier = 1;
+    for (const upgrade of state.upgrades) {
+      if (
+        upgrade.purchased
+        && upgrade.target === "adventurer"
+        && upgrade.adventurerId === adventurer.id
+      ) {
+        adventurerMultiplier = adventurerMultiplier * upgrade.multiplier;
+      }
+    }
+    const contribution
+      = adventurer.combatPower
+        * adventurer.count
+        * adventurerMultiplier
+        * globalMultiplier
+        * prestigeMultiplier;
+    partyCombatPower = partyCombatPower + contribution;
+  }
+
+  return partyCombatPower
+    * equipmentCombatMultiplier
+    * setCombatMultiplier
+    * echoCombatMultiplier
+    * craftedCombatMultiplier
+    * companionCombatMult;
+};
+
 /**
  * Pure function — applies one game tick to the state.
  * DeltaSeconds: time elapsed since last tick.
@@ -517,6 +601,19 @@ export const applyTick = (
     challengeCrystals = result.crystalsAwarded;
   }
 
+  // Auto-unlock adventurer-specific upgrades when their adventurer is recruited
+  updatedUpgrades = updatedUpgrades.map((upgrade) => {
+    if (upgrade.unlocked || upgrade.adventurerId === undefined) {
+      return upgrade;
+    }
+    const adventurer = updatedAdventurers.find((a) => {
+      return a.id === upgrade.adventurerId;
+    });
+    return adventurer !== undefined && adventurer.count > 0
+      ? { ...upgrade, unlocked: true }
+      : upgrade;
+  });
+
   const goldValue = capResource(state.resources.gold + goldGained + questGold);
   const essenceValue = capResource(
     state.resources.essence + essenceGained + questEssence,