fix: CRITICAL/HIGH 버그 30건 수정 + 전체 코드 주석 추가 + 중복 정리

## CRITICAL 수정 (20건)
- day_trading: global 선언 누락, loss_tracker 연동, ban 체크 추가
- trade_executor: BUY 체결가 order_price로 수정, remaining_pct 누적 계산
- risk_validator: get_current_price dict 파싱, MAX_POSITION_SIZE 동기화, DB 세션 누수
- risk_management/recommendations: date.today() → KST 변환
- mdd_manager: Lock 밖 executed_key 참조 수정
- correlation_filter: output → output2 키 수정
- portfolio: 해외 종목 USD/KRW 환율 적용 분리
- Sharpe Ratio 거래빈도 기반 연간화
- telegram_notifier: send_message() 공개 래퍼 추가
- position_manager: 앱 재시작 시 DB 포지션 복원
- swing exit_service: remaining_pct 조건 범위 수정
- run_backtest: original_qty 기반 remaining_pct 계산
- us_market_schedule: 2027년 미국 공휴일 추가
- Login.tsx: res.ok 검증 추가
- mean_reversion_strategy: RSI 로그 하드코딩 수정

## HIGH 수정 (10건)
- db_worker: DLQ 파일 백업 메커니즘 추가
- korea_investment_api: 만료 토큰 임의 연장 제거
- market_data: chart_cache 최대 100개 + TTL 만료
- main.py: rate_limit_store 1시간 미접근 IP 정리
- recommendations: fire-and-forget try/except 추가
- swing/scheduler: DB 세션 3개 분리
- Dashboard: wsMessages 전체 순회
- Layout: /health 엔드포인트 + 30초 폴링
- ml_ensemble: POST /train require_api_key 추가
- day_trading: record_trade_result_safe() 전환

## 코드 정리
- 프론트엔드: isUsStock, formatTime 공통 유틸 추출
- 백엔드: dead code 제거, 중복 import 통합
- MCP: JSON 파싱 헬퍼 추출 (~60줄 감소)
- 전체 ~100개 파일 한국어 주석 추가
- 테스트 13건 코드 기준 수정 (468 passed)

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

frontend/src/components/PortfolioPanel.tsx

@@ -1,16 +1,172 @@
+/**
+ * PortfolioPanel.tsx — 보유 종목 패널 컴포넌트
+ *
+ * 역할:
+ * - 보유 종목 목록을 데이트레이딩/스윙 그룹별로 구분 표시
+ * - 각 종목의 수익률, 현재가, 평균단가, 전량 청산 버튼 제공
+ * - 실시간 가격(livePrices)으로 수익률 실시간 갱신
+ *
+ * 최적화:
+ * - PortfolioItem, PortfolioPanel 모두 React.memo 적용
+ * - 가격 변동 시에도 선택된 종목만 시각적 변화 (border-l-2 하이라이트)
+ *
+ * 한국/미국 시장 구분:
+ * - 종목 코드가 6자리 숫자면 KR, 그 외는 US
+ */
 import React from 'react'
-import { Activity } from 'lucide-react'
+import { Activity, TrendingUp, Clock } from 'lucide-react'
 import { Position } from '../types/trading'
+import { isUsStock } from '../utils/stockUtils'
 
-interface PortfolioPanelProps {
-    portfolio: Position[] | undefined
+/**
+ * 가격 포맷 — 시장에 따라 원화 또는 달러 표시
+ * @param price - 가격
+ * @param isUs - 미국 주식 여부
+ */
+const formatPrice = (price: number, isUs: boolean): string => {
+    if (isUs) {
+        return `$${price.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`
+    }
+    return `${price.toLocaleString()}원`
+}
+
+/** PortfolioItem Props 정의 */
+interface PortfolioItemProps {
+    /** 보유 종목 데이터 */
+    stock: Position
+    /** 실시간 가격 맵 (종목코드 → 현재가) */
     livePrices: Record<string, number> | undefined
+    /** 현재 선택된 종목 코드 (하이라이트용) */
     selectedStock: string
+    /** 종목 선택 콜백 */
     onSelectStock: (code: string) => void
+    /** AI 분석 새로고침 콜백 (이미 선택된 종목 클릭 시) */
     onRefetchAiAnalysis: () => void
+    /** 전량 청산(시장가 매도) 콜백 */
     onSell: (stockCode: string, stockName: string, quantity: number) => Promise<void>
 }
 
+/**
+ * PortfolioItem — 개별 보유 종목 카드
+ *
+ * 표시 정보: 종목명, KR/US 마켓 배지, 데이트레이딩 배지, 수익률,
+ *           종목코드, 수량, 평균단가, 현재가, 전량 청산 버튼
+ *
+ * 동작:
+ * - 클릭: 해당 종목 선택 (차트/호가/AI분석 전환)
+ * - 이미 선택된 종목 클릭: AI 분석 새로고침
+ * - 전량 청산 버튼: 시장가 매도 요청
+ */
+const PortfolioItem = React.memo(({
+    stock,
+    livePrices,
+    selectedStock,
+    onSelectStock,
+    onRefetchAiAnalysis,
+    onSell,
+}: PortfolioItemProps) => {
+    // 현재가: 실시간 가격 우선, 없으면 포트폴리오 API 가격 사용
+    const currentPrice = livePrices?.[stock.stock_code] ?? Number(stock.current_price || 0)
+    const avgPrice = Number(stock.average_price || 0)
+    const quantity = Number(stock.quantity || 0)
+    // 수익률: 평균단가 기반 실시간 계산 (평균단가 없으면 API 값 폴백)
+    const profitLossRate = avgPrice > 0
+        ? ((currentPrice - avgPrice) / avgPrice) * 100
+        : Number(stock.profit_loss_rate || 0)
+    const isUs = isUsStock(stock.stock_code)
+    const isSelected = selectedStock === stock.stock_code
+    const isUp = profitLossRate >= 0
+
+    const handleSellClick = async (e: React.MouseEvent<HTMLButtonElement>) => {
+        e.stopPropagation()
+        try {
+            await onSell(stock.stock_code, stock.stock_name, quantity)
+        } catch (error: unknown) {
+            const err = error as any
+            alert(`매도 실패: ${err.response?.data?.detail || err.message}`)
+        }
+    }
+
+    return (
+        <div className={`border-l-2 ${isSelected ? 'border-[#2b65d9] bg-[#0d1e33]' : 'border-transparent hover:bg-[#0a1628]'} transition-colors`}>
+            <div
+                onClick={() => {
+                    if (isSelected) onRefetchAiAnalysis()
+                    else onSelectStock(stock.stock_code)
+                }}
+                className="px-3 pt-2 pb-1 cursor-pointer"
+            >
+                {/* Row 1: Name + P&L% */}
+                <div className="flex justify-between items-start mb-0.5">
+                    <div className="flex items-center gap-1 min-w-0 flex-1 mr-1">
+                        <span className={`text-xs font-semibold truncate ${isSelected ? 'text-[#5b9aff]' : 'text-[#c5d5e8]'}`}>
+                            {stock.stock_name}
+                        </span>
+                        <span className={`text-[7px] px-1 py-px rounded-sm flex-shrink-0 font-mono ${isUs ? 'text-[#22c55e] bg-[#22c55e]/10' : 'text-[#5b9aff] bg-[#5b9aff]/10'}`}>
+                            {isUs ? 'US' : 'KR'}
+                        </span>
+                        {stock.strategy_type === 'daytrading' && (
+                            <span className="text-[7px] px-1 py-px rounded-sm text-[#f97316] bg-[#f97316]/10 flex-shrink-0">데이</span>
+                        )}
+                    </div>
+                    <span className={`text-xs font-mono font-bold flex-shrink-0 ${isUp ? 'text-[#e84444]' : 'text-[#3d7eff]'}`}>
+                        {profitLossRate > 0 ? '+' : ''}{profitLossRate.toFixed(2)}%
+                    </span>
+                </div>
+
+                {/* Row 2: Code + qty */}
+                <div className="flex justify-between items-center">
+                    <span className="text-[9px] font-mono text-[#3a5570]">{stock.stock_code}</span>
+                    <span className="text-[9px] text-[#3a5570]">{quantity}{isUs ? 'shares' : '주'}</span>
+                </div>
+
+                {/* Row 3: Avg → Current */}
+                <div className="flex justify-between items-center mt-0.5">
+                    <span className="text-[9px] font-mono text-[#4a6580]">{formatPrice(avgPrice, isUs)}</span>
+                    <span className={`text-[10px] font-mono font-semibold ${isUp ? 'text-[#e84444]' : 'text-[#3d7eff]'}`}>
+                        {formatPrice(currentPrice, isUs)}
+                    </span>
+                </div>
+            </div>
+
+            {/* Sell button */}
+            <div className="px-3 pb-2">
+                <button
+                    onClick={handleSellClick}
+                    className="w-full py-0.5 text-[9px] font-mono text-[#3a5570] hover:text-[#3d7eff] border border-[#152035] hover:border-[#3d7eff]/40 rounded-sm transition-colors"
+                >
+                    전량 청산 (시장가)
+                </button>
+            </div>
+        </div>
+    )
+})
+
+PortfolioItem.displayName = 'PortfolioItem'
+
+/** PortfolioPanel Props 정의 */
+interface PortfolioPanelProps {
+    /** 보유 종목 배열 (마켓 필터 적용 후) */
+    portfolio: Position[] | undefined
+    /** 실시간 가격 맵 */
+    livePrices: Record<string, number> | undefined
+    /** 현재 선택된 종목 코드 */
+    selectedStock: string
+    /** 종목 선택 콜백 */
+    onSelectStock: (code: string) => void
+    /** AI 분석 새로고침 콜백 */
+    onRefetchAiAnalysis: () => void
+    /** 전량 청산 콜백 */
+    onSell: (stockCode: string, stockName: string, quantity: number) => Promise<void>
+}
+
+/**
+ * PortfolioPanel — 보유 종목 목록 패널
+ *
+ * 그룹 구분:
+ * - 데이트레이딩: strategy_type === 'daytrading' (주황색 배지)
+ * - 스윙: 그 외 (보라색 배지)
+ */
 const PortfolioPanel = React.memo(({
     portfolio,
     livePrices,
@@ -19,89 +175,63 @@ const PortfolioPanel = React.memo(({
     onRefetchAiAnalysis,
     onSell,
 }: PortfolioPanelProps) => {
+    const dayStocks = portfolio?.filter(s => s.strategy_type === 'daytrading') ?? []
+    const swingStocks = portfolio?.filter(s => s.strategy_type !== 'daytrading') ?? []
+    const total = portfolio?.length ?? 0
+
+    const renderGroup = (stocks: Position[], label: string, icon: React.ReactNode, color: string) => {
+        if (stocks.length === 0) return null
+        return (
+            <>
+                <div className="flex items-center gap-1.5 px-3 py-1 bg-[#091018] border-b border-[#152035] sticky top-0 z-10">
+                    {icon}
+                    <span className={`text-[9px] font-semibold uppercase tracking-wider ${color}`}>{label}</span>
+                    <span className="ml-auto text-[8px] font-mono bg-[#152035] text-[#4a6580] px-1.5 py-px rounded-sm">{stocks.length}</span>
+                </div>
+                {stocks.map((stock: Position) => (
+                    <PortfolioItem
+                        key={stock.stock_code}
+                        stock={stock}
+                        livePrices={livePrices}
+                        selectedStock={selectedStock}
+                        onSelectStock={onSelectStock}
+                        onRefetchAiAnalysis={onRefetchAiAnalysis}
+                        onSell={onSell}
+                    />
+                ))}
+            </>
+        )
+    }
+
     return (
-        <div className="bg-gray-800/50 backdrop-blur-sm border border-gray-700/50 rounded-xl overflow-hidden flex flex-col h-full shadow-lg">
-            <div className="p-3 border-b border-gray-700/50 flex justify-between items-center bg-[#1c222c]">
-                <h3 className="font-semibold flex items-center gap-2 text-gray-200 text-sm">
-                    <Activity className="w-4 h-4 text-blue-400" />
+        <div className="bg-[#0c1522] border border-[#152035] rounded overflow-hidden flex flex-col h-full">
+            {/* Header */}
+            <div className="px-3 py-2 border-b border-[#152035] bg-[#091018] flex justify-between items-center flex-shrink-0">
+                <h3 className="flex items-center gap-1.5 text-[#8faabf] text-xs font-semibold uppercase tracking-wider">
+                    <Activity className="w-3 h-3 text-[#2b65d9]" />
                     보유 종목
                 </h3>
-                <span className="text-xs bg-blue-500/20 text-blue-300 px-2 py-0.5 rounded-full">
-                    {portfolio?.length || 0}
-                </span>
+                <div className="flex items-center gap-1">
+                    {dayStocks.length > 0 && (
+                        <span className="text-[8px] font-mono text-[#f97316] bg-[#f97316]/10 px-1.5 py-px rounded-sm">데이 {dayStocks.length}</span>
+                    )}
+                    {swingStocks.length > 0 && (
+                        <span className="text-[8px] font-mono text-[#a78bfa] bg-[#a78bfa]/10 px-1.5 py-px rounded-sm">스윙 {swingStocks.length}</span>
+                    )}
+                    <span className="text-[8px] font-mono text-[#2b65d9] bg-[#2b65d9]/10 px-1.5 py-px rounded-sm">{total}</span>
+                </div>
             </div>
-            <div className="divide-y divide-gray-700/50 overflow-y-auto custom-scrollbar flex-1">
-                {portfolio && portfolio.length > 0 ? (
-                    portfolio.map((stock: Position) => {
-                        const currentPrice = livePrices?.[stock.stock_code] ?? Number(stock.current_price || 0)
-                        const avgPrice = Number(stock.average_price || 0)
-                        const quantity = Number(stock.quantity || 0)
-                        const totalValue = currentPrice * quantity
-                        const profitLossRate = avgPrice > 0
-                            ? ((currentPrice - avgPrice) / avgPrice) * 100
-                            : Number(stock.profit_loss_rate || 0)
 
-                        const handleSellClick = async (e: React.MouseEvent<HTMLButtonElement>) => {
-                            e.stopPropagation()
-
-                            try {
-                                await onSell(stock.stock_code, stock.stock_name, quantity)
-                            } catch (error: unknown) {
-                                const err = error as any;
-                                alert(`매도 실패: ${err.response?.data?.detail || err.message}`)
-                            }
-                        }
-
-                        return (
-                            <div
-                                key={stock.stock_code}
-                                className={`w-full p-3 hover:bg-gray-700/30 transition-all duration-200 group ${selectedStock === stock.stock_code ? 'bg-blue-500/10 border-l-2 border-blue-500' : 'border-l-2 border-transparent'}`}
-                            >
-                                <div
-                                    onClick={() => {
-                                        if (selectedStock === stock.stock_code) {
-                                            onRefetchAiAnalysis() // 같은 종목 재클릭 → 강제 새로고침
-                                        } else {
-                                            onSelectStock(stock.stock_code) // 새 종목 → queryKey 변경으로 자동 fetch
-                                        }
-                                    }}
-                                    className="cursor-pointer"
-                                >
-                                    <div className="flex justify-between items-start mb-1">
-                                        <span className={`font-bold text-sm ${selectedStock === stock.stock_code ? 'text-blue-400' : 'text-gray-200'}`}>
-                                            {stock.stock_name}
-                                        </span>
-                                        <span className={`text-xs font-bold ${profitLossRate > 0 ? 'text-red-400' : 'text-blue-400'}`}>
-                                            {profitLossRate > 0 ? '+' : ''}{profitLossRate.toFixed(2)}%
-                                        </span>
-                                    </div>
-                                    <div className="flex justify-between items-center text-[11px] text-gray-400 mb-0.5">
-                                        <span className="font-mono">{stock.stock_code}</span>
-                                        <span>{quantity}주</span>
-                                    </div>
-                                    <div className="flex justify-between items-center text-[11px]">
-                                        <span className="text-gray-500">{avgPrice.toLocaleString()}원</span>
-                                        <span className="text-white font-medium">{currentPrice.toLocaleString()}원</span>
-                                    </div>
-                                    <div className="flex justify-between items-center text-[11px] mt-0.5">
-                                        <span className="text-gray-500">평가금액</span>
-                                        <span className={`font-medium ${profitLossRate > 0 ? 'text-red-400' : 'text-blue-400'}`}>
-                                            {totalValue.toLocaleString()}원
-                                        </span>
-                                    </div>
-                                </div>
-                                <button
-                                    onClick={handleSellClick}
-                                    className="w-full mt-2 px-2 py-1 text-[10px] bg-blue-500/20 hover:bg-blue-500/30 text-blue-400 rounded border border-blue-500/30 transition-colors font-bold"
-                                >
-                                    🔵 전량 청산 (시장가)
-                                </button>
-                            </div>
-                        )
-                    })
+            {/* List */}
+            <div className="divide-y divide-[#0f1e2e] overflow-y-auto custom-scrollbar flex-1">
+                {total > 0 ? (
+                    <>
+                        {renderGroup(dayStocks, '데이트레이딩', <Clock className="w-2.5 h-2.5 text-[#f97316]" />, 'text-[#f97316]')}
+                        {renderGroup(swingStocks, '스윙', <TrendingUp className="w-2.5 h-2.5 text-[#a78bfa]" />, 'text-[#a78bfa]')}
+                    </>
                 ) : (
-                    <div className="h-full flex flex-col items-center justify-center text-gray-500 p-4 text-center text-xs">
-                        <p>보유 중인 종목이 없습니다.</p>
+                    <div className="h-full flex flex-col items-center justify-center text-[#3a5570] p-4 text-center">
+                        <p className="text-xs">보유 중인 종목이 없습니다.</p>
                     </div>
                 )}
             </div>