fix(hub): restore pre-WS quote path and relieve Gate/account contention

Two audit rounds after WS rollback: lighten hub options snapshot, cache hub balances without extra fetch_balance, soft-poll single-flight, and document fixes in R1/R2 reports.

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

lib/common/static/options_panel.js

@@ -40,6 +40,7 @@
   let chainSoftTimer = null;
   let lastChainSoftAt = 0;
   let chainQuotedAt = 0;
+  let chainLoadInFlight = false;
   let pendingTtlSeconds = 600;
   const POSITIONS_STALE_MS = 45000;
   const PENDING_POLL_MS = 8000;
@@ -669,6 +670,7 @@
   function softRefreshChainThrottled(force) {
     if (document.hidden) return;
     if (!document.getElementById("options-root")) return;
+    if (chainLoadInFlight) return;
     const now = Date.now();
     if (!force && now - lastChainSoftAt < CHAIN_SOFT_POLL_MS) return;
     lastChainSoftAt = now;
@@ -1239,11 +1241,16 @@
 
   async function loadChain(opts) {
     const soft = !!(opts && opts.soft);
+    // soft 门禁必须在 seq++ 之前,否则叠刷会抬高 seq 导致 inFlight 永不清理
+    if (chainLoadInFlight && soft) return;
     const uly = state.underlying;
     const seq = ++chainLoadSeq;
     const btn = document.getElementById("opt-load-chain");
+    const hadChain = chainHasExpiries(state.chain) && state.chain.underlying === uly;
+    chainLoadInFlight = true;
     if (btn && !soft) btn.disabled = true;
-    if (!soft) {
+    // 已有链时不先清空,避免刷新白屏
+    if (!soft && !hadChain) {
       setExpirySelectStatus("加载到期日中…");
       const tbody = document.getElementById("opt-strike-tbody");
       if (tbody) {
@@ -1254,7 +1261,9 @@
     try {
       let d = null;
       let lastMsg = "";
-      for (let attempt = 0; attempt < 3; attempt++) {
+      // soft 只试 1 次,避免与 15s 轮询叠加重试打爆 OKX
+      const maxAttempts = soft ? 1 : 3;
+      for (let attempt = 0; attempt < maxAttempts; attempt++) {
         if (seq !== chainLoadSeq) return;
         d = await apiJson("/api/options/chain?underlying=" + encodeURIComponent(uly));
         if (seq !== chainLoadSeq) return;
@@ -1264,8 +1273,8 @@
           !!(d && d.rate_limited) ||
           /50011|Too Many Requests|过于频繁/i.test(String(lastMsg || ""));
         d = null;
-        if (attempt < 2) {
-          if (!soft) {
+        if (attempt < maxAttempts - 1) {
+          if (!soft && !hadChain) {
             setExpirySelectStatus(
               rateLimited ? "OKX 限频,稍后重试…" : "重试加载到期日…"
             );
@@ -1339,7 +1348,10 @@
           "</td></tr>";
       }
     } finally {
-      if (seq === chainLoadSeq && btn) btn.disabled = false;
+      if (seq === chainLoadSeq) {
+        chainLoadInFlight = false;
+        if (btn) btn.disabled = false;
+      }
     }
   }