Allow entering sheet counts for each options-options hedge leg.

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

lib/hedge_plan/templates/hedge_plan_panel.html

@@ -124,7 +124,22 @@
         </div>
         <div id="hp-oo-index" class="muted hp-quote-line"></div>
         <div id="hp-oo-bal-line" class="muted hp-quote-line"></div>
-        <div id="hp-oo-legs" class="muted" style="margin-top:8px;line-height:1.6">尚未选用两腿</div>
+        <p class="muted hp-unit-hint">单位说明:目标价=指数价(USD) · 张数=<strong>期权张</strong>(整张) · 权利金结算币=USDC</p>
+        <div id="hp-oo-legs" class="hp-oo-legs">
+          <div class="hp-oo-leg-row" data-leg="a">
+            <div class="muted" id="hp-oo-leg-a-info">腿A: 尚未选用</div>
+            <label>张数 <span class="hp-unit">期权张</span>
+              <input type="number" step="1" min="1" id="hp-oo-sheets-a" value="1" disabled />
+            </label>
+          </div>
+          <div class="hp-oo-leg-row" data-leg="b">
+            <div class="muted" id="hp-oo-leg-b-info">腿B: 尚未选用</div>
+            <label>张数 <span class="hp-unit">期权张</span>
+              <input type="number" step="1" min="1" id="hp-oo-sheets-b" value="1" disabled />
+            </label>
+          </div>
+          <p class="muted" id="hp-oo-prem-line"></p>
+        </div>
       </div>
       <div class="card">
         <h2>期权 T 型报价</h2>
@@ -195,4 +210,4 @@
     </div>
   </div>
 </div>
-<script src="/static/hedge_plan.js?v=7"></script>
+<script src="/static/hedge_plan.js?v=8"></script>