fix: exchange-specific volume rank APIs for OKX and full top20

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

manual_trading_hub/hub.py

@@ -381,14 +381,18 @@ def _refresh_volume_ranks(*, force: bool = False) -> dict:
         if not ex_key or not ex.get("enabled"):
             continue
         resp = _fetch_instance_volume_rank_sync(ex, top_n=TOP_N_DEFAULT)
-        if resp.get("ok"):
+        if resp.get("ok") and resp.get("items"):
             cache = merge_exchange_rank(cache, ex_key, resp)
         else:
             msg = str(resp.get("msg") or resp.get("error") or "拉取失败")
+            if resp.get("ok") and not resp.get("items"):
+                msg = msg if msg != "拉取失败" else "无有效成交额数据"
             errors.append(f"{ex_key}:{msg}")
             exchanges = dict(cache.get("exchanges") or {})
             prev = dict(exchanges.get(ex_key) or {})
             prev["error"] = msg
+            if not prev.get("items"):
+                prev["items"] = []
             exchanges[ex_key] = prev
             cache["exchanges"] = exchanges
     cache["rank_date"] = expected

manual_trading_hub/static/chart.js

@@ -2621,14 +2621,23 @@
     elVolRankList.innerHTML = "";
     if (!data || !data.ok || !data.items || !data.items.length) {
       elVolRankMeta.textContent =
-        (data && data.msg) || "暂无排名数据（请稍后或检查实例 /api/hub/volume-rank）";
+        (data && data.msg) ||
+        "暂无排名数据（请 pm2 restart 四实例与 manual-trading-hub 后重试）";
       return;
     }
     const resetHour = data.reset_hour != null ? data.reset_hour : 8;
     const rankDate = data.rank_date || "—";
     const updated = data.updated_at || "—";
+    const total = data.total_symbols != null ? data.total_symbols : "";
     elVolRankMeta.textContent =
-      "昨日成交 Top20 · 交易日 " + rankDate + " · 每早 " + resetHour + ":00 更新 · " + updated;
+      "昨日成交 Top20 · 交易日 " +
+      rankDate +
+      " · 每早 " +
+      resetHour +
+      ":00 更新" +
+      (total ? " · 全市场 " + total + " 个" : "") +
+      " · " +
+      updated;
     const curSym = (elSymbol && elSymbol.value.trim().toUpperCase()) || "";
     data.items.forEach(function (row) {
       const li = document.createElement("li");