Fold chain/account/PnL hints into rules; hide dust sell-coin.

Move the three noisy help lines into 规则说明, and show 手动卖回币 only when trading-coin balance meets the exchange min size.

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

lib/common/static/hedge_plan.js

@@ -1097,7 +1097,7 @@
       "</div></div>" +
       "</div>" +
       '<div class="hp-live-combo">' +
-      '<span class="muted">组合净盈亏(扣开平手续费·永续盘口均价)</span>' +
+      '<span class="muted" title="扣开平手续费·永续盘口均价(详见左侧规则说明)">组合净盈亏</span>' +
       '<strong class="' +
       comboCls +
       '">' +
@@ -1577,18 +1577,55 @@
   function setSellCoinMsg(text, kind) {
     const el = $("hp-sell-coin-msg");
     if (!el) return;
+    const show = !!(text || "").trim();
+    el.hidden = !show;
     el.textContent = text || "";
     el.classList.toggle("is-err", kind === "err");
     el.classList.toggle("is-ok", kind === "ok");
     el.classList.toggle("muted", !kind);
   }
 
+  function setSellCoinVisible(visible, meta) {
+    const btn = $("hp-sell-coin-btn");
+    if (!btn) return;
+    const on = !!visible;
+    btn.hidden = !on;
+    btn.disabled = !on;
+    if (on && meta) {
+      const uly = String(meta.underlying || state.underlying || "ETH").toUpperCase();
+      const avail = meta.available != null ? Number(meta.available) : null;
+      const minSz = meta.min_sz != null ? Number(meta.min_sz) : null;
+      let tip = "市价卖出交易账户全部可用 " + uly + " 换回 USDT";
+      if (avail != null && !Number.isNaN(avail)) tip += " · 可用 " + avail;
+      if (minSz != null && !Number.isNaN(minSz)) tip += " · 最小 " + minSz;
+      btn.title = tip;
+    }
+    if (!on) setSellCoinMsg("", null);
+  }
+
+  async function refreshSellCoinVisibility() {
+    const uly = String(state.underlying || "ETH").toUpperCase();
+    try {
+      const d = await apiJson(
+        "/api/hedge-plan/sell-coin-status?underlying=" + encodeURIComponent(uly)
+      );
+      if (!d || !d.ok) {
+        setSellCoinVisible(false);
+        return;
+      }
+      setSellCoinVisible(!!d.sellable, d);
+    } catch (_) {
+      setSellCoinVisible(false);
+    }
+  }
+
   async function submitSellCoin() {
     const uly = String(state.underlying || "ETH").toUpperCase();
+    const btn = $("hp-sell-coin-btn");
+    if (!btn || btn.hidden) return;
     if (!window.confirm("确认市价卖出交易账户全部可用 " + uly + " 换回 USDT？")) return;
     setSellCoinMsg("卖回中…", null);
-    const btn = $("hp-sell-coin-btn");
-    if (btn) btn.disabled = true;
+    btn.disabled = true;
     try {
       const d = await apiJson("/api/hedge-plan/sell-coin", {
         method: "POST",
@@ -1597,6 +1634,7 @@
       });
       if (!d.ok) {
         setSellCoinMsg(d.msg || "卖回失败", "err");
+        await refreshSellCoinVisibility();
         return;
       }
       const sold =
@@ -1606,10 +1644,10 @@
       setSellCoinMsg(sold, "ok");
       await loadChain();
       void loadLivePositions();
+      await refreshSellCoinVisibility();
     } catch (e) {
       setSellCoinMsg(e.message || "卖回失败", "err");
-    } finally {
-      if (btn) btn.disabled = false;
+      await refreshSellCoinVisibility();
     }
   }
 
@@ -2059,6 +2097,7 @@
         $("hp-profit-rr").value = "2";
       }
     }
+    void refreshSellCoinVisibility();
   }
 
   function currentExp(selectId) {
@@ -2186,14 +2225,6 @@
       }
       tbody.appendChild(tr);
     });
-    if (isOptionPrimary() && !state.poStrikeExpandAll && state.moneyFilter === "all") {
-      const hintTr = document.createElement("tr");
-      hintTr.innerHTML =
-        '<td colspan="' +
-        cols +
-        '" class="muted opt-strike-hint">默认显示约 5 档(平值 + 实值2 + 虚值2) · 勾选「展开全部」查看该到期更多行权价</td>';
-      tbody.appendChild(hintTr);
-    }
     tbody.querySelectorAll(".hp-pick").forEach(function (btn) {
       btn.addEventListener("click", function () {
         const inst = btn.getAttribute("data-inst");