Dedupe duplicate ticket closes so stats match MT5 today PnL.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/routes.py

@@ -782,20 +782,32 @@ def register_routes(app: Flask) -> None:
                 )
                 tid = int(conn.execute("SELECT last_insert_rowid()").fetchone()[0])
 
-            # 同一账户+单号只保留一条「持仓中」，其余重复未平仓直接关掉（不计盈亏）
-            if ticket and close_time in (None, ""):
+            # 同一账户+单号只保留一条有效记录：
+            # - 上报持仓：关掉其它未平仓副本
+            # - 上报平仓：其它同单号副本盈亏清空（防 history 重复插入双计）
+            if ticket:
                 dup_snap = json.dumps(
                     {"event": "dedupe_closed", "kept_id": tid}, ensure_ascii=False
                 )
-                conn.execute(
-                    """
-                    UPDATE trades
-                    SET close_time=?, profit=NULL, snapshot_json=?
-                    WHERE account_id=? AND ticket=? AND id!=?
-                      AND (close_time IS NULL OR close_time='')
-                    """,
-                    (database.now(), dup_snap, act["account_id"], ticket, tid),
-                )
+                if close_time in (None, ""):
+                    conn.execute(
+                        """
+                        UPDATE trades
+                        SET close_time=?, profit=NULL, snapshot_json=?
+                        WHERE account_id=? AND ticket=? AND id!=?
+                          AND (close_time IS NULL OR close_time='')
+                        """,
+                        (database.now(), dup_snap, act["account_id"], ticket, tid),
+                    )
+                else:
+                    conn.execute(
+                        """
+                        UPDATE trades
+                        SET profit=NULL, snapshot_json=?
+                        WHERE account_id=? AND ticket=? AND id!=?
+                        """,
+                        (dup_snap, act["account_id"], ticket, tid),
+                    )
         return jsonify({"ok": True, "id": tid})
 
     @app.post("/api/v1/trades/reconcile")
@@ -932,8 +944,9 @@ def register_routes(app: Flask) -> None:
         account_id = None if u["role"] == "admin" else u.get("account_id")
         machines, machine_id = _resolve_machine_filter(u, machine_raw)
         with database.get_db() as conn:
-            # 清掉历史假平仓上误写的盈亏
+            # 清掉假平仓盈亏 + 同单号重复平仓双计
             database.scrub_synthetic_trade_profits(conn)
+            database.scrub_duplicate_ticket_profits(conn)
             stats = database.trade_stats(
                 conn,
                 account_id=account_id,