fix: 全仓模式预估风险/盈利按杠杆与可用保证金计算

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

static/manual_order_rr_preview.js

@@ -1,5 +1,7 @@
 /**
  * 实盘下单：填完币种与止盈止损后，在表单下方显示预估风险 / 预估盈利 / 预估盈亏比。
+ * 以损定仓：风险 = 当前交易基数 × risk%。
+ * 全仓杠杆：风险 = 可用保证金×缓冲 × 杠杆 × |SL-入场|/入场（与开仓 calc_risk_amount_from_plan 一致）。
  */
 (function (global) {
   "use strict";
@@ -36,6 +38,29 @@
     el.innerHTML = label + "：<strong>" + valueText + "</strong>";
   }
 
+  function sizingMode() {
+    return (document.body && document.body.getAttribute("data-position-sizing-mode")) || "risk";
+  }
+
+  function isFullMarginMode() {
+    return sizingMode() === "full_margin";
+  }
+
+  function fullMarginBuffer() {
+    const n = Number(document.body && document.body.getAttribute("data-full-margin-buffer"));
+    return Number.isFinite(n) && n > 0 ? n : 0.9;
+  }
+
+  function leverageForSymbol(sym) {
+    const u = (sym || "").trim().toUpperCase();
+    const btc = Number(document.body && document.body.getAttribute("data-btc-leverage"));
+    const alt = Number(document.body && document.body.getAttribute("data-alt-leverage"));
+    if (u.startsWith("BTC") || u.startsWith("ETH")) {
+      return Number.isFinite(btc) && btc > 0 ? btc : 10;
+    }
+    return Number.isFinite(alt) && alt > 0 ? alt : 5;
+  }
+
   function riskPercent() {
     const form = $("add-order-form");
     const raw =
@@ -46,6 +71,20 @@
     return Number.isFinite(n) && n > 0 ? n : 1;
   }
 
+  function calcRiskFraction(direction, entry, sl) {
+    const e = num(entry);
+    const s = num(sl);
+    if (e === null || s === null || e <= 0 || s <= 0) return null;
+    let risk = 0;
+    if (direction === "short") {
+      risk = s - e;
+    } else {
+      risk = e - s;
+    }
+    if (risk <= 0) return null;
+    return risk / e;
+  }
+
   function calcRr(direction, entry, sl, tp) {
     const e = num(entry);
     const s = num(sl);
@@ -79,6 +118,16 @@
     return e + (e - s) * r;
   }
 
+  function resolveSlPrice(mode, direction, entry) {
+    if (mode === "pct") {
+      const slPct = num($("order-sl-pct") && $("order-sl-pct").value);
+      if (slPct === null || slPct <= 0) return null;
+      if (direction === "short") return entry * (1 + slPct / 100);
+      return entry * (1 - slPct / 100);
+    }
+    return num($("order-sl") && $("order-sl").value);
+  }
+
   function currentMode() {
     return ($("sltp-mode") && $("sltp-mode").value) || "fixed_rr";
   }
@@ -140,13 +189,26 @@
     }
   }
 
-  function plannedRiskU(capital) {
+  function plannedRiskFromRiskMode(capital) {
     const cap = num(capital);
     if (cap === null || cap <= 0) return null;
     return Math.round((cap * riskPercent()) / 100 * 100) / 100;
   }
 
-  function resolvePreviewRr(m, dir, entry, data) {
+  function plannedRiskFromFullMargin(availableUsdt, symbol, direction, entry, sl) {
+    const avail = num(availableUsdt);
+    if (avail === null || avail <= 0) return null;
+    const slPx = num(sl);
+    const entryPx = num(entry);
+    if (slPx === null || entryPx === null) return null;
+    const rf = calcRiskFraction(direction, entryPx, slPx);
+    if (rf === null) return null;
+    const margin = Math.round(avail * fullMarginBuffer() * 100) / 100;
+    const lev = leverageForSymbol(symbol);
+    return Math.round(margin * lev * rf * 100) / 100;
+  }
+
+  function resolvePreviewRr(m, dir, entry) {
     if (m === "pct") {
       return calcRrFromPct(
         $("order-sl-pct") && $("order-sl-pct").value,
@@ -204,13 +266,22 @@
           paintFail("fetch_fail");
           return;
         }
-        const rr = resolvePreviewRr(m, dir, entry, data);
+        const rr = resolvePreviewRr(m, dir, entry);
         if (rr === null) {
           paintFail("invalid");
           return;
         }
-        const capital = num(account.current_capital);
-        const riskU = plannedRiskU(capital);
+        let riskU = null;
+        if (isFullMarginMode()) {
+          const slPx = resolveSlPrice(m, dir, entry);
+          const avail =
+            data.available_trading_usdt != null
+              ? data.available_trading_usdt
+              : account.available_trading_usdt;
+          riskU = plannedRiskFromFullMargin(avail, sym, dir, entry, slPx);
+        } else {
+          riskU = plannedRiskFromRiskMode(account.current_capital);
+        }
         if (riskU === null) {
           paintFail("fetch_fail");
           return;
@@ -263,6 +334,7 @@
     refresh: refreshNow,
     calcRr: calcRr,
     calcRrFromPct: calcRrFromPct,
+    calcRiskFraction: calcRiskFraction,
     formatRr: formatRr,
   };
 })(typeof window !== "undefined" ? window : globalThis);