심볼 레벨 메소 BIGINT 확장

그랜드 어센틱심볼 상위 레벨 메소가 INT(2.1B) 범위를 초과하므로
SymbolLevel.meso_cost를 BIGINT로 변경.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/models/symbol/SymbolLevel.js

@@ -6,7 +6,7 @@ export const SymbolLevel = sequelize.define('SymbolLevel', {
   symbol_id: { type: DataTypes.INTEGER, allowNull: false },
   level: { type: DataTypes.TINYINT, allowNull: false },
   required_count: { type: DataTypes.SMALLINT, allowNull: false },
-  meso_cost: { type: DataTypes.INTEGER, allowNull: false },
+  meso_cost: { type: DataTypes.BIGINT, allowNull: false },
 }, {
   tableName: 'sym_levels',
   underscored: true,

frontend/src/features/symbol/Symbol.jsx

@@ -123,7 +123,10 @@ function SymbolCard({ symbol, equipped }) {
       </div>
 
       {/* 획득량 입력 */}
-      <div className="grid gap-2 mb-4" style={{ gridTemplateColumns: '0.7fr 1.3fr 1fr' }}>
+      <div
+        className="grid gap-2 mb-4"
+        style={{ gridTemplateColumns: symbol.weekly_default > 0 ? '0.7fr 1.3fr 1fr' : '1fr 1fr' }}
+      >
         <div className="space-y-1">
           <label className="block text-xs text-gray-400">일퀘 획득</label>
           <input
@@ -134,6 +137,7 @@ function SymbolCard({ symbol, equipped }) {
             className="w-full h-10 rounded-md border border-white/10 bg-gray-950 px-3 text-base text-right tabular-nums outline-none focus:border-emerald-500/50 hover:border-white/20 disabled:opacity-50 transition"
           />
         </div>
+        {symbol.weekly_default > 0 && (
           <div className="space-y-1">
             <label className="block text-xs text-gray-400">주간퀘 획득</label>
             <Select
@@ -141,11 +145,12 @@ function SymbolCard({ symbol, equipped }) {
               onChange={setWeeklyCount}
               options={[1, 2, 3].map((n) => ({
                 value: n,
-              label: `${n * (symbol.weekly_default || 0)}개`,
+                label: `${n * symbol.weekly_default}개`,
               }))}
               disabled={!equipped}
             />
           </div>
+        )}
         <div className="space-y-1">
           <label className="block text-xs text-gray-400">추가 심볼</label>
           <input