React + FastAPI 풀 마이그레이션 — Streamlit 제거

- backend/ — FastAPI + JWT + 모든 REST 엔드포인트
- frontend/ — Next.js 14 + Tailwind + 7페이지 (대시보드/트레이드/거래소/자동매매/설정/내정보/로그인)
- core_logic.py — 신호계산/알림 로직 분리 (기존 app_streamlit.py 에서 추출)
- users_db.py + bcrypt 인증, exchange_keys.py + Fernet 암호화
- trades_db.py — 진입/청산 lifecycle 추적, signal_events raw 로그
- settings_db.py — 모든 운영 파라미터 DB 영속 저장 (RSI/거래량/펀딩비 임계값 포함)
- docker-compose: frontend / backend / postgres + Traefik 라우팅
- assets/logo.svg — JUNGGOMOA 그라디언트 로고

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

assets/logo.svg

@@ -0,0 +1,26 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 220 60" width="220" height="60">
+  <defs>
+    <linearGradient id="brand" x1="0" y1="0" x2="1" y2="0">
+      <stop offset="0%" stop-color="#3b82f6"/>
+      <stop offset="100%" stop-color="#60a5fa"/>
+    </linearGradient>
+  </defs>
+  <!-- 캔들차트 모티프 -->
+  <g transform="translate(6, 10)">
+    <!-- 첫 캔들 (양봉) -->
+    <line x1="4" y1="6" x2="4" y2="40" stroke="#26a69a" stroke-width="1.4"/>
+    <rect x="1" y="20" width="6" height="14" fill="#26a69a" rx="1"/>
+    <!-- 둘째 캔들 (음봉) -->
+    <line x1="14" y1="2" x2="14" y2="34" stroke="#ef5350" stroke-width="1.4"/>
+    <rect x="11" y="8" width="6" height="18" fill="#ef5350" rx="1"/>
+    <!-- 셋째 캔들 (양봉) -->
+    <line x1="24" y1="10" x2="24" y2="42" stroke="#26a69a" stroke-width="1.4"/>
+    <rect x="21" y="14" width="6" height="22" fill="#26a69a" rx="1"/>
+    <!-- 추세선 -->
+    <polyline points="2,28 14,18 24,10" fill="none" stroke="url(#brand)" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round"/>
+    <circle cx="24" cy="10" r="2.2" fill="#60a5fa"/>
+  </g>
+  <!-- 텍스트 -->
+  <text x="46" y="28" font-family="'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif" font-weight="800" font-size="18" fill="url(#brand)" letter-spacing="1.2">JUNGGOMOA</text>
+  <text x="46" y="44" font-family="'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif" font-weight="500" font-size="10" fill="#9ca3af" letter-spacing="0.5">트레이딩 시스템</text>
+</svg>