Fix 期期 sheets bias: split total 2n from same-sheets, not n.

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

lib/common/static/hedge_plan.js

@@ -364,9 +364,11 @@
     if (!(ratio > 0) || !(ratio < 1)) ratio = 0.7;
     const splitBy = state.ooBiasSplitBy === "sheets" ? "sheets" : "budget";
     const pair = costA + costB;
-    let nSame = pair > 0 ? Math.floor(budget / pair + 1e-12) : 0;
-    nSame = capByDepth(nSame, state.legA && state.legA.ask_sz);
-    nSame = capByDepth(nSame, state.legB && state.legB.ask_sz);
+    const nPair = pair > 0 ? Math.floor(budget / pair + 1e-12) : 0;
+    const nSame = Math.min(
+      capByDepth(nPair, state.legA && state.legA.ask_sz),
+      capByDepth(nPair, state.legB && state.legB.ask_sz)
+    );
 
     let nA = 0;
     let nB = 0;
@@ -381,12 +383,14 @@
       let nCall = 0;
       let nPut = 0;
       if (splitBy === "sheets") {
-        if (nSame < 2) {
-          return { sheetsA: 0, sheetsB: 0, premium: 0, ok: false, msg: "同张数规模不足 2,无法按比例拆分" };
+        // 总张数 = 同张数两侧合计(每腿 n → 共 2n),再按比例拆
+        const total = nSame * 2;
+        if (total < 2) {
+          return { sheetsA: 0, sheetsB: 0, premium: 0, ok: false, msg: "同张数总规模不足 2,无法按比例拆分" };
         }
-        let majorN = Math.round(nSame * ratio);
-        majorN = Math.max(1, Math.min(majorN, nSame - 1));
-        const minorN = nSame - majorN;
+        let majorN = Math.round(total * ratio);
+        majorN = Math.max(1, Math.min(majorN, total - 1));
+        const minorN = total - majorN;
         nCall = majorIsCall ? majorN : minorN;
         nPut = majorIsCall ? minorN : majorN;
       } else {

lib/env/env_ui_manifest.py

@@ -149,7 +149,7 @@ _HEDGE_PLAN_SECTION: dict[str, Any] = {
         (
             "HEDGE_PLAN_OO_BIAS_SPLIT_BY",
             "期期做多做空拆分口径",
-            "默认预算金额;budget=按权利金预算按比例分两腿;sheets=先算同张数 n 再按比例拆张数",
+            "默认预算金额;budget=按权利金预算按比例分两腿;sheets=先算同张数总张数(2n)再按比例拆",
         ),
         (
             "HEDGE_PLAN_OO_BIAS_RATIO",

lib/hedge_plan/hedge_plan_calc_lib.py

@@ -243,9 +243,12 @@ def suggest_oo_sheets(
         return _fail("缺少有效卖一价,无法建议张数")
 
     pair = cost_a + cost_b
-    n_same = int(math.floor(budget / pair + 1e-12)) if pair > 0 else 0
-    n_same = _cap_sheets_by_ask_depth(n_same, ask_sz_a)
-    n_same = _cap_sheets_by_ask_depth(n_same, ask_sz_b)
+    n_pair = int(math.floor(budget / pair + 1e-12)) if pair > 0 else 0
+    # 与同张数一致:先按预算得 n,再各自深度封顶后取 min
+    n_same = min(
+        _cap_sheets_by_ask_depth(n_pair, ask_sz_a),
+        _cap_sheets_by_ask_depth(n_pair, ask_sz_b),
+    )
 
     if m == "same_sheets":
         n_a = n_same
@@ -262,11 +265,13 @@ def suggest_oo_sheets(
             return _fail(err)
         major_is_call = m == "long_bias"
         if split_by == "sheets":
-            if n_same < 2:
-                return _fail("同张数规模不足 2,无法按比例拆分")
-            major_n = int(round(n_same * ratio))
-            major_n = max(1, min(major_n, n_same - 1))
-            minor_n = n_same - major_n
+            # 总张数 = 同张数两侧合计(每腿 n → 共 2n),再按比例拆到 Call/Put
+            total = int(n_same) * 2
+            if total < 2:
+                return _fail("同张数总规模不足 2,无法按比例拆分")
+            major_n = int(round(total * ratio))
+            major_n = max(1, min(major_n, total - 1))
+            minor_n = total - major_n
             n_call = major_n if major_is_call else minor_n
             n_put = minor_n if major_is_call else major_n
         else:

lib/hedge_plan/templates/hedge_plan_panel.html

@@ -301,4 +301,4 @@
     </div>
   </div>
 </div>
-<script src="/static/hedge_plan.js?v=23"></script>
+<script src="/static/hedge_plan.js?v=24"></script>