fix: 持仓卡片布局优化、闭盘禁用平仓、固定金额step修复

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

install_trading.py

@@ -644,6 +644,7 @@ def install_trading(app, *, login_required, require_nav, get_db, get_setting, se
             "est_fee_open": fee_info["open_fee"],
             "est_fee_close": fee_info["close_fee"],
             "est_fee_close_type": fee_info["close_type"],
+            "fee_source": fee_info.get("fee_source") or "local",
             "est_pnl_net": est_net,
             "sl_order_active": order_st.get("sl_monitoring"),
             "tp_order_active": order_st.get("tp_monitoring"),
@@ -654,6 +655,7 @@ def install_trading(app, *, login_required, require_nav, get_db, get_setting, se
             "price_precision": tick.get("price_precision"),
             "tick_size": tick.get("tick_size"),
             "can_close": True,
+            "close_allowed": is_trading_session(),
             "pending_orders": pending_for_row,
             "trailing_be": bool(mon.get("trailing_be")) if mon else False,
             "trailing_r_locked": int(mon.get("trailing_r_locked") or 0) if mon else 0,