Use 100k equity for recommend list when CTP is offline.

When SimNow or live CTP is disconnected, the tradable-products section shows four whitelisted symbols and calculates max lots from a fixed 100,000 capital instead of reference capital in settings.

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

app.py

@@ -811,16 +811,16 @@ def api_symbols_recommended():
     """品种下拉：仅展示当前资金下可开仓品种（与下方可开仓品种表一致）。"""
     from recommend_store import recommend_payload
     from trading_context import (
-        get_account_capital,
         get_fixed_lots,
         get_max_margin_pct,
+        get_recommend_capital,
         get_sizing_mode,
         get_trading_mode,
     )
 
     conn = get_db()
     try:
-        capital = get_account_capital(conn, get_setting)
+        capital = get_recommend_capital(conn, get_setting)
         payload = recommend_payload(
             conn,
             live_capital=capital,