주식 매도 히스토리 API 추가 (/api/portfolio/sell-history)

- sell_history 테이블 신규 생성 (db.py init_db)
- CRUD 함수 추가: add_sell_history, get_sell_history, delete_sell_history
- GET /api/portfolio/sell-history (broker, days 필터)
- POST /api/portfolio/sell-history (id 포함 저장된 레코드 반환)
- DELETE /api/portfolio/sell-history/{record_id}

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

stock-lab/app/main.py

@@ -15,6 +15,7 @@ from .db import (
     update_portfolio_item, delete_portfolio_item,
     upsert_broker_cash, get_all_broker_cash, get_broker_cash, delete_broker_cash,
     upsert_asset_snapshot, get_asset_snapshots,
+    add_sell_history, get_sell_history, delete_sell_history,
 )
 from .scraper import fetch_market_news, fetch_major_indices, fetch_overseas_news
 from .price_fetcher import get_current_prices
@@ -361,3 +362,41 @@ def get_snapshot_history(days: int = Query(30, ge=0)):
     return {"snapshots": snapshots}
 
 
+# --- Sell History API ---
+
+class SellHistoryRequest(BaseModel):
+    broker: str
+    ticker: str
+    name: str
+    quantity: int
+    avg_price: float
+    sell_price: float
+    buy_amount: float
+    sell_amount: float
+    realized_profit: float
+    realized_rate: float
+    sold_at: str
+
+
+@app.get("/api/portfolio/sell-history")
+def list_sell_history(broker: Optional[str] = None, days: Optional[int] = None):
+    """매도 내역 조회 (broker, days 필터 선택)"""
+    records = get_sell_history(broker=broker, days=days)
+    return {"records": records}
+
+
+@app.post("/api/portfolio/sell-history")
+def create_sell_history(req: SellHistoryRequest):
+    """매도 기록 저장"""
+    record = add_sell_history(req.model_dump())
+    return record
+
+
+@app.delete("/api/portfolio/sell-history/{record_id}")
+def remove_sell_history(record_id: int):
+    """매도 기록 삭제"""
+    if not delete_sell_history(record_id):
+        return JSONResponse(status_code=404, content={"error": "not found"})
+    return {"ok": True}
+
+