Apply 200k scope when CTP offline; trailing breakeven order UX.

When SimNow or live CTP is disconnected, default to the four-product whitelist regardless of reference capital. Trailing breakeven defaults off; when enabled hide take-profit and risk-reward, monitor exits via trailing stop only. Document both behaviors in TRADING.md and FEATURES.md.

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

app.py

@@ -791,11 +791,12 @@ def api_symbol_search():
     q = request.args.get("q", "")
     conn = get_db()
     try:
-        from trading_context import get_account_capital
+        from trading_context import get_account_capital, is_ctp_connected
         capital = get_account_capital(conn, get_setting)
+        ctp_connected = is_ctp_connected(get_setting)
     finally:
         conn.close()
-    return jsonify(search_symbols(q, capital=capital))
+    return jsonify(search_symbols(q, capital=capital, ctp_connected=ctp_connected))
 
 
 @app.route("/api/symbols/mains")