도구 일러스트 에셋 7종 추가 및 건물 아이콘 적용

- public/assets/tools/: 낚싯대·도끼·곡괭이·약초바구니·냄비·톱·빗 (적성 키 이름)
- 원본 파일명 axe/pickaxe가 서로 뒤바뀌어 있어 교정
- VillageView 건물 스프라이트를 일러스트로 교체 (로드 전 이모지 폴백)
- BuildingCard 헤더 아이콘도 일러스트 사용

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/components/game/Game.tsx

@@ -4,7 +4,7 @@ import { useState } from "react";
 import { useGame } from "@/hooks/useGame";
 import VillageView from "@/components/game/VillageView";
 import { engine, catRate } from "@/lib/game/engine";
-import { APTITUDE_LABEL, PASSIVES } from "@/lib/game/data";
+import { APTITUDE_LABEL, PASSIVES, TOOL_IMG } from "@/lib/game/data";
 import type { Building, Cat, GameState } from "@/lib/game/types";
 
 export default function Game() {
@@ -129,9 +129,15 @@ function BuildingCard({
 
   return (
     <div className="rounded-xl border border-gray-200 p-5 dark:border-gray-800">
-      <div className="mb-1 flex items-baseline justify-between">
-        <h3 className="font-semibold">
-          {building.emoji} {building.name} Lv{building.level}
+      <div className="mb-1 flex items-center justify-between">
+        <h3 className="flex items-center gap-2 font-semibold">
+          {/* eslint-disable-next-line @next/next/no-img-element */}
+          <img
+            src={TOOL_IMG[building.aptitude]}
+            alt={building.name}
+            className="h-8 w-8 object-contain"
+          />
+          {building.name} Lv{building.level}
         </h3>
         <span className="text-xs text-gray-400">
           필요 적성: {APTITUDE_LABEL[building.aptitude]}