매도 히스토리 수정 API 추가 (PUT /api/portfolio/sell-history/:id)

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

stock-lab/app/db.py

@@ -242,6 +242,19 @@ def get_sell_history(broker: str = None, days: int = None) -> List[Dict[str, Any
         return [dict(r) for r in rows]
 
 
+def update_sell_history(record_id: int, data: Dict[str, Any]) -> Dict[str, Any] | None:
+    fields = ["broker", "ticker", "name", "quantity", "avg_price", "sell_price",
+              "buy_amount", "sell_amount", "realized_profit", "realized_rate", "sold_at"]
+    set_clause = ", ".join(f"{f} = ?" for f in fields)
+    values = [data[f] for f in fields] + [record_id]
+    with _conn() as conn:
+        cur = conn.execute(f"UPDATE sell_history SET {set_clause} WHERE id = ?", values)
+        if cur.rowcount == 0:
+            return None
+        row = conn.execute("SELECT * FROM sell_history WHERE id = ?", (record_id,)).fetchone()
+        return dict(row)
+
+
 def delete_sell_history(record_id: int) -> bool:
     with _conn() as conn:
         cur = conn.execute("DELETE FROM sell_history WHERE id = ?", (record_id,))