fix: TradingView K线图表并修复品种推荐为空。

- 行情页改用 Lightweight Charts 标准蜡烛图（红跌绿涨）
- 修复 fee_rates 缺 source 列导致推荐刷新失败
- 空缓存自动重试，持仓页实时兜底计算推荐列表

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

product_recommend.py

@@ -1,6 +1,7 @@
 """按账户资金推荐可交易品种（期货核心筛选）。"""
 from __future__ import annotations
 
+import logging
 import math
 from concurrent.futures import ThreadPoolExecutor
 from typing import Callable, Optional
@@ -9,6 +10,8 @@ from contract_specs import get_contract_spec
 from fee_specs import calc_fee_breakdown
 from symbols import PRODUCTS
 
+logger = logging.getLogger(__name__)
+
 
 def _letters_from_ths(ths_code: str) -> str:
     import re
@@ -61,9 +64,13 @@ def assess_product_for_capital(
     ref_sl = round(p - stop_dist, 4)
     ref_tp = round(p + stop_dist * reward_risk_ratio, 4)
     fee_ths = ths + "8888"
-    fee_info = calc_fee_breakdown(
-        fee_ths, p, p, 1.0, open_time="", close_time="", trading_mode=trading_mode,
-    )
+    try:
+        fee_info = calc_fee_breakdown(
+            fee_ths, p, p, 1.0, open_time="", close_time="", trading_mode=trading_mode,
+        )
+    except Exception as exc:
+        logger.debug("recommend fee calc failed %s: %s", ths, exc)
+        fee_info = {"open_fee": 0.0, "total_fee": 0.0}
 
     can_margin = max_lots >= 1
     can_risk = cap > 0 and risk_one_lot <= cap * 0.01
@@ -109,16 +116,28 @@ def list_product_recommendations(
 
     def _one(product: dict) -> dict:
         ths = product["ths"]
-        quote = quote_fn(ths) or {}
-        price = quote.get("price")
-        row = assess_product_for_capital(
-            product, capital, price,
-            max_margin_pct=max_margin_pct,
-            trading_mode=trading_mode,
-        )
-        main_code = (quote.get("ths_code") or "").strip()
-        row["main_code"] = main_code
-        return row
+        try:
+            quote = quote_fn(ths) or {}
+            price = quote.get("price")
+            row = assess_product_for_capital(
+                product, capital, price,
+                max_margin_pct=max_margin_pct,
+                trading_mode=trading_mode,
+            )
+            main_code = (quote.get("ths_code") or "").strip()
+            row["main_code"] = main_code
+            return row
+        except Exception as exc:
+            logger.warning("recommend product failed %s: %s", ths, exc)
+            return {
+                "ths": ths,
+                "name": product.get("name") or ths,
+                "exchange": product.get("exchange") or "",
+                "status": "no_price",
+                "status_label": "计算失败",
+                "main_code": "",
+                "max_lots": 0,
+            }
 
     with ThreadPoolExecutor(max_workers=10) as pool:
         rows = list(pool.map(_one, PRODUCTS))