fix: invalidate stale 12-item volume rank cache and force full top20 refresh

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

manual_trading_hub/static/chart.js

@@ -2629,15 +2629,24 @@
     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 " +
+    const count = data.items.length;
+    const expect = data.expected_count != null ? data.expected_count : 20;
+    let meta =
+      "昨日成交 Top" +
+      expect +
+      " · 交易日 " +
       rankDate +
       " · 每早 " +
       resetHour +
-      ":00 更新" +
-      (total ? " · 全市场 " + total + " 个" : "") +
-      " · " +
-      updated;
+      ":00 更新 · 显示 " +
+      count +
+      "/" +
+      expect +
+      " 条";
+    if (total) meta += " · 全市场 " + total + " 个";
+    if (data.stale) meta += " · 数据不完整，正在重拉…";
+    meta += " · " + updated;
+    elVolRankMeta.textContent = meta;
     const curSym = (elSymbol && elSymbol.value.trim().toUpperCase()) || "";
     data.items.forEach(function (row) {
       const li = document.createElement("li");
@@ -2667,21 +2676,24 @@
     });
   }
 
-  async function loadVolumeRank() {
+  async function loadVolumeRank(forceRefresh) {
     const exKey = (elExchange && elExchange.value) || "";
     if (!exKey || !elVolRankMeta) return;
     elVolRankMeta.textContent = "加载排名…";
     if (elVolRankList) elVolRankList.innerHTML = "";
     try {
-      const r = await fetch(
-        "/api/chart/volume-rank?exchange_key=" + encodeURIComponent(exKey),
-        { credentials: "same-origin" }
-      );
+      let url = "/api/chart/volume-rank?exchange_key=" + encodeURIComponent(exKey);
+      if (forceRefresh) url += "&refresh=1";
+      const r = await fetch(url, { credentials: "same-origin" });
       const data = await r.json();
       if (!r.ok) {
         throw new Error((data && data.detail) || (data && data.msg) || "加载失败");
       }
       renderVolumeRank(data);
+      const expect = data.expected_count != null ? data.expected_count : 20;
+      if (!forceRefresh && data.ok && data.items && data.items.length < expect) {
+        void loadVolumeRank(true);
+      }
     } catch (e) {
       renderVolumeRank({ ok: false, msg: String(e.message || e) });
     }