fix: add KJB strategy to frontend strategy list and backtest form

- Add KJB card to strategy page with Zap icon
- Create /strategy/kjb detail page with ranking table and rules reference
- Add KJB option to backtest strategy dropdown
- Add KJB-specific params UI (max positions, cash reserve, stop-loss, targets)
- Hide rebalance period selector when KJB is selected (uses daily simulation)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/app/backtest/page.tsx

@@ -60,6 +60,7 @@ const strategyOptions = [
   { value: 'multi_factor', label: '멀티 팩터' },
   { value: 'quality', label: '슈퍼 퀄리티' },
   { value: 'value_momentum', label: '밸류 모멘텀' },
+  { value: 'kjb', label: '김종봉 단기매매' },
 ];
 
 const periodOptions = [
@@ -98,6 +99,13 @@ export default function BacktestPage() {
   const [vmValueWeight, setVmValueWeight] = useState(0.5);
   const [vmMomentumWeight, setVmMomentumWeight] = useState(0.5);
 
+  // KJB params
+  const [kjbMaxPositions, setKjbMaxPositions] = useState(10);
+  const [kjbCashReserve, setKjbCashReserve] = useState(0.3);
+  const [kjbStopLoss, setKjbStopLoss] = useState(0.03);
+  const [kjbTarget1, setKjbTarget1] = useState(0.05);
+  const [kjbTarget2, setKjbTarget2] = useState(0.10);
+
   useEffect(() => {
     const init = async () => {
       try {
@@ -167,6 +175,14 @@ export default function BacktestPage() {
           value_weight: vmValueWeight,
           momentum_weight: vmMomentumWeight,
         };
+      } else if (strategyType === 'kjb') {
+        strategyParams = {
+          max_positions: kjbMaxPositions,
+          cash_reserve_ratio: kjbCashReserve,
+          stop_loss_pct: kjbStopLoss,
+          target1_pct: kjbTarget1,
+          target2_pct: kjbTarget2,
+        };
       }
 
       const response = await api.post<{ id: number }>('/api/backtest', {
@@ -379,7 +395,8 @@ export default function BacktestPage() {
                     </div>
                   </div>
 
-                  {/* Rebalancing Period */}
+                  {/* Rebalancing Period (not for KJB) */}
+                  {strategyType !== 'kjb' && (
                   <div className="space-y-2">
                     <Label htmlFor="period">리밸런싱 주기</Label>
                     <Select value={rebalancePeriod} onValueChange={setRebalancePeriod}>
@@ -395,6 +412,7 @@ export default function BacktestPage() {
                       </SelectContent>
                     </Select>
                   </div>
+                  )}
 
                   {/* Initial Capital & Top N */}
                   <div className="grid grid-cols-2 gap-3">
@@ -514,6 +532,80 @@ export default function BacktestPage() {
                     </div>
                   )}
 
+                  {strategyType === 'kjb' && (
+                    <div className="space-y-3 p-3 bg-muted/50 rounded-lg">
+                      <Label className="text-sm font-medium">KJB 매매 설정</Label>
+                      <div className="grid grid-cols-2 gap-3">
+                        <div className="space-y-1">
+                          <Label htmlFor="kjb-max-pos" className="text-xs">최대 종목 수</Label>
+                          <Input
+                            id="kjb-max-pos"
+                            type="number"
+                            min="1"
+                            max="30"
+                            value={kjbMaxPositions}
+                            onChange={(e) => setKjbMaxPositions(parseInt(e.target.value))}
+                            className="h-8"
+                          />
+                        </div>
+                        <div className="space-y-1">
+                          <Label htmlFor="kjb-cash" className="text-xs">현금 비중</Label>
+                          <Input
+                            id="kjb-cash"
+                            type="number"
+                            step="0.05"
+                            min="0"
+                            max="0.9"
+                            value={kjbCashReserve}
+                            onChange={(e) => setKjbCashReserve(parseFloat(e.target.value))}
+                            className="h-8"
+                          />
+                        </div>
+                      </div>
+                      <div className="grid grid-cols-3 gap-2">
+                        <div className="space-y-1">
+                          <Label htmlFor="kjb-sl" className="text-xs">손절 %</Label>
+                          <Input
+                            id="kjb-sl"
+                            type="number"
+                            step="0.01"
+                            min="0.01"
+                            max="0.2"
+                            value={kjbStopLoss}
+                            onChange={(e) => setKjbStopLoss(parseFloat(e.target.value))}
+                            className="h-8"
+                          />
+                        </div>
+                        <div className="space-y-1">
+                          <Label htmlFor="kjb-t1" className="text-xs">1차 익절 %</Label>
+                          <Input
+                            id="kjb-t1"
+                            type="number"
+                            step="0.01"
+                            min="0.01"
+                            max="0.5"
+                            value={kjbTarget1}
+                            onChange={(e) => setKjbTarget1(parseFloat(e.target.value))}
+                            className="h-8"
+                          />
+                        </div>
+                        <div className="space-y-1">
+                          <Label htmlFor="kjb-t2" className="text-xs">2차 익절 %</Label>
+                          <Input
+                            id="kjb-t2"
+                            type="number"
+                            step="0.01"
+                            min="0.01"
+                            max="1"
+                            value={kjbTarget2}
+                            onChange={(e) => setKjbTarget2(parseFloat(e.target.value))}
+                            className="h-8"
+                          />
+                        </div>
+                      </div>
+                    </div>
+                  )}
+
                   {/* Advanced options toggle */}
                   <button
                     type="button"

frontend/src/app/strategy/kjb/page.tsx

@@ -0,0 +1,198 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { useRouter } from 'next/navigation';
+import { DashboardLayout } from '@/components/layout/dashboard-layout';
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { Skeleton } from '@/components/ui/skeleton';
+import { api } from '@/lib/api';
+
+interface StockFactor {
+  ticker: string;
+  name: string;
+  market: string;
+  sector_name: string | null;
+  market_cap: number | null;
+  close_price: number | null;
+  per: number | null;
+  pbr: number | null;
+  dividend_yield: number | null;
+  value_score: number | null;
+  momentum_score: number | null;
+  total_score: number | null;
+  rank: number | null;
+}
+
+interface StrategyResult {
+  strategy_name: string;
+  base_date: string;
+  universe_count: number;
+  result_count: number;
+  stocks: StockFactor[];
+}
+
+export default function KJBStrategyPage() {
+  const router = useRouter();
+  const [loading, setLoading] = useState(false);
+  const [initialLoading, setInitialLoading] = useState(true);
+  const [result, setResult] = useState<StrategyResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  const [topN, setTopN] = useState(30);
+
+  useEffect(() => {
+    const init = async () => {
+      try {
+        await api.getCurrentUser();
+      } catch {
+        router.push('/login');
+      } finally {
+        setInitialLoading(false);
+      }
+    };
+    init();
+  }, [router]);
+
+  const runStrategy = async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await api.post<StrategyResult>('/api/strategy/kjb', {
+        universe: {
+          markets: ['KOSPI'],
+        },
+        top_n: topN,
+      });
+      setResult(data);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Strategy execution failed');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const formatNumber = (value: number | null, decimals: number = 2) => {
+    if (value === null) return '-';
+    return value.toFixed(decimals);
+  };
+
+  const formatCurrency = (value: number | null) => {
+    if (value === null) return '-';
+    return new Intl.NumberFormat('ko-KR').format(value);
+  };
+
+  if (initialLoading) {
+    return (
+      <DashboardLayout>
+        <Skeleton className="h-8 w-48 mb-6" />
+        <Skeleton className="h-48 rounded-xl" />
+      </DashboardLayout>
+    );
+  }
+
+  return (
+    <DashboardLayout>
+      <h1 className="text-2xl font-bold text-foreground mb-6">김종봉 단기매매 전략</h1>
+
+      {error && (
+        <div className="bg-destructive/10 border border-destructive text-destructive px-4 py-3 rounded mb-4">
+          {error}
+        </div>
+      )}
+
+      {/* Settings */}
+      <Card className="mb-6">
+        <CardHeader>
+          <CardTitle>전략 설정</CardTitle>
+        </CardHeader>
+        <CardContent>
+          <div className="grid grid-cols-1 md:grid-cols-2 gap-4 mb-4">
+            <div className="space-y-2">
+              <Label htmlFor="top-n">상위 종목 수</Label>
+              <Input
+                id="top-n"
+                type="number"
+                min="1"
+                max="30"
+                value={topN}
+                onChange={(e) => setTopN(parseInt(e.target.value))}
+              />
+            </div>
+            <div className="space-y-2">
+              <Label className="text-muted-foreground text-sm">유니버스</Label>
+              <p className="text-sm">KOSPI 시가총액 상위 30 종목</p>
+            </div>
+          </div>
+          <Button onClick={runStrategy} disabled={loading}>
+            {loading ? '실행 중...' : '전략 실행'}
+          </Button>
+        </CardContent>
+      </Card>
+
+      {/* Rules Reference */}
+      <Card className="mb-6">
+        <CardHeader>
+          <CardTitle className="text-base">매매 규칙</CardTitle>
+        </CardHeader>
+        <CardContent className="text-sm text-muted-foreground space-y-1">
+          <p><strong>매수:</strong> RS {'>'} 100 (KOSPI 대비) AND (20일 박스 돌파 OR 장대양봉)</p>
+          <p><strong>손절:</strong> 진입가 -3%</p>
+          <p><strong>1차 익절:</strong> +5% → 50% 매도, 손절선 본전 상향</p>
+          <p><strong>2차 익절:</strong> +10% → 나머지 전량 매도</p>
+          <p><strong>현금 비중:</strong> 30% 유지, 최대 10종목</p>
+        </CardContent>
+      </Card>
+
+      {/* Results */}
+      {result && (
+        <Card>
+          <CardHeader>
+            <CardTitle>
+              결과 ({result.result_count}/{result.universe_count} 종목)
+            </CardTitle>
+            <p className="text-sm text-muted-foreground">기준일: {result.base_date}</p>
+          </CardHeader>
+          <CardContent className="p-0">
+            <div className="overflow-x-auto">
+              <table className="w-full">
+                <thead className="bg-muted">
+                  <tr>
+                    <th scope="col" className="px-4 py-3 text-left text-sm font-medium text-muted-foreground">순위</th>
+                    <th scope="col" className="px-4 py-3 text-left text-sm font-medium text-muted-foreground">종목</th>
+                    <th scope="col" className="px-4 py-3 text-left text-sm font-medium text-muted-foreground">섹터</th>
+                    <th scope="col" className="px-4 py-3 text-right text-sm font-medium text-muted-foreground">시가총액(억)</th>
+                    <th scope="col" className="px-4 py-3 text-right text-sm font-medium text-muted-foreground">현재가</th>
+                    <th scope="col" className="px-4 py-3 text-right text-sm font-medium text-muted-foreground">PER</th>
+                    <th scope="col" className="px-4 py-3 text-right text-sm font-medium text-muted-foreground">PBR</th>
+                    <th scope="col" className="px-4 py-3 text-right text-sm font-medium text-muted-foreground">모멘텀</th>
+                    <th scope="col" className="px-4 py-3 text-right text-sm font-medium text-muted-foreground">종합</th>
+                  </tr>
+                </thead>
+                <tbody className="divide-y divide-border">
+                  {result.stocks.map((stock) => (
+                    <tr key={stock.ticker} className="hover:bg-muted/50">
+                      <td className="px-4 py-3 text-sm font-medium">{stock.rank}</td>
+                      <td className="px-4 py-3">
+                        <span className="font-medium" title={stock.ticker}>{stock.name || stock.ticker}</span>
+                      </td>
+                      <td className="px-4 py-3 text-sm">{stock.sector_name || '-'}</td>
+                      <td className="px-4 py-3 text-sm text-right">{formatCurrency(stock.market_cap)}</td>
+                      <td className="px-4 py-3 text-sm text-right">{formatCurrency(stock.close_price)}</td>
+                      <td className="px-4 py-3 text-sm text-right">{formatNumber(stock.per)}</td>
+                      <td className="px-4 py-3 text-sm text-right">{formatNumber(stock.pbr)}</td>
+                      <td className="px-4 py-3 text-sm text-right">{formatNumber(stock.momentum_score)}</td>
+                      <td className="px-4 py-3 text-sm text-right font-medium">{formatNumber(stock.total_score)}</td>
+                    </tr>
+                  ))}
+                </tbody>
+              </table>
+            </div>
+          </CardContent>
+        </Card>
+      )}
+    </DashboardLayout>
+  );
+}

frontend/src/app/strategy/page.tsx

@@ -6,7 +6,7 @@ import { DashboardLayout } from '@/components/layout/dashboard-layout';
 import { StrategyCard } from '@/components/strategy/strategy-card';
 import { api } from '@/lib/api';
 import { Skeleton } from '@/components/ui/skeleton';
-import { BarChart3, Star, TrendingUp } from 'lucide-react';
+import { BarChart3, Star, TrendingUp, Zap } from 'lucide-react';
 
 const strategies = [
   {
@@ -36,6 +36,15 @@ const strategies = [
     risk: 'high' as const,
     stockCount: 25,
   },
+  {
+    id: 'kjb',
+    title: '김종봉 단기매매',
+    description: 'KOSPI 대비 상대강도 + 박스권 돌파/장대양봉 기반 단기 트레이딩 전략입니다. 손절 -3%, 익절 +5%/+10%.',
+    icon: Zap,
+    expectedCagr: '20-30%',
+    risk: 'high' as const,
+    stockCount: 30,
+  },
 ];
 
 export default function StrategyListPage() {