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

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

symbols.py

@@ -461,20 +461,25 @@ def _match_score(product: dict, q_lower: str) -> int:
     return 10
 
 
-def search_symbols(query: str) -> list:
+def search_symbols(query: str, *, capital: float | None = None) -> list:
     q = query.strip()
     if not q:
         return []
 
     q_lower = q.lower()
     from market_sessions import is_night_trading_session
+    from product_recommend import filter_products_for_capital, is_small_account
+
     night_only = is_night_trading_session()
+    product_pool = PRODUCTS
+    if capital is not None and is_small_account(capital):
+        product_pool = filter_products_for_capital(PRODUCTS, capital)
     with _main_index_lock:
         index = dict(_main_index)
     index_ready = bool(index)
 
     scored: list[tuple[int, dict]] = []
-    for p in PRODUCTS:
+    for p in product_pool:
         if night_only and not product_has_night_session(p):
             continue
         if not _product_matches(p, q_lower):
@@ -492,6 +497,11 @@ def search_symbols(query: str) -> list:
     if not results and len(q) >= 3:
         codes = ths_to_codes(q)
         if codes:
+            product = _product_for_contract_code(codes["ths_code"])
+            if capital is not None and is_small_account(capital):
+                from product_recommend import is_small_account, product_in_small_account_whitelist
+                if not product or not product_in_small_account_whitelist(product):
+                    return results
             raw = fetch_raw_for_volume(codes["sina_code"])
             name = raw["name"] if raw else q
             results.append(_enrich_item({