Limit tradable products to four varieties for accounts at or below 100k.

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

install_trading.py

@@ -28,10 +28,7 @@ from position_sizing import (
     calc_order_tick_metrics,
     normalize_sizing_mode,
 )
-from recommend_store import (
-    recommend_payload,
-    refresh_recommend_cache,
-)
+from product_recommend import assert_product_allowed_for_capital, is_small_account, SMALL_ACCOUNT_SCOPE_LABEL
 from recommend_stream import recommend_hub, schedule_recommend_refresh, start_recommend_worker
 from position_stream import position_hub, start_position_worker
 from ctp_settings import is_ctp_auto_connect_enabled
@@ -1645,6 +1642,8 @@ def install_trading(app, *, login_required, require_nav, get_db, get_setting, se
                 recommend_rows=rec_cache.get("rows") or [],
                 recommend_updated_at=rec_cache.get("updated_at"),
                 night_session=is_night_trading_session(),
+                small_account_scope=is_small_account(capital),
+                small_account_scope_label=SMALL_ACCOUNT_SCOPE_LABEL,
                 product_categories=PRODUCT_CATEGORIES,
             )
         finally:
@@ -2148,6 +2147,10 @@ def install_trading(app, *, login_required, require_nav, get_db, get_setting, se
             if err:
                 conn.close()
                 return jsonify({"ok": False, "error": err}), 403
+            scope_err = assert_product_allowed_for_capital(sym, _capital(conn))
+            if scope_err:
+                conn.close()
+                return jsonify({"ok": False, "error": scope_err}), 403
         ctp_st = ctp_status(mode)
         if not ctp_st.get("connected"):
             conn.close()
@@ -2503,6 +2506,10 @@ def install_trading(app, *, login_required, require_nav, get_db, get_setting, se
             conn.close()
             return jsonify({"ok": False, "error": err}), 403
         capital = _capital(conn)
+        scope_err = assert_product_allowed_for_capital(sym, capital)
+        if scope_err:
+            conn.close()
+            return jsonify({"ok": False, "error": scope_err}), 403
         codes = ths_to_codes(sym)
         price = fetch_price(sym, codes.get("market_code", "") if codes else "", codes.get("sina_code", "") if codes else "")
         plan, perr = compute_trend_plan_futures(