孕期首页过渡：过预产期询问避让首页引导、弹窗、底部弹层

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

index.html

@@ -2050,7 +2050,7 @@
 <!-- 2026-10-05 首页头图：宝宝时不时动一动小手小脚（独立文件，删掉这一行即下线） -->
 <script src="js/baby-limbs.js?v=26101201"></script>
 <script src="js/coach.js?v=26101211"></script>
-<script src="js/birth-flow.js?v=26102101"></script>
+<script src="js/birth-flow.js?v=26102102"></script>
 
 <!-- 禁止下拉回弹（2026-10-11 统一规则，与孕期体重同一段）：竖向拖动时从手指下往上找还能朝该方向滚的容器，找不到才拦；横滑、双指、可滚列表不受影响 -->
 <script>

js/birth-flow.js

@@ -214,8 +214,14 @@
     if (over < 1) return;
     var today = iso(new Date());
     try { if (!DEMO && localStorage.getItem(ASK_KEY) === today) return; localStorage.setItem(ASK_KEY, today); } catch (e) {}
-    /* 等首页先渲染、开屏引导之类的弹层先走，再问 */
-    setTimeout(function () { if (!ov.classList.contains('on')) askSheet(over); }, 2500);
+    /* 等首页先渲染；首页使用引导、弹窗、底部弹层开着就再等等，别叠在一起 */
+    var tries = 0;
+    function wait() {
+      var busy = $('.mb-coach.show') || $('.modal.show') || $('#sheet.show') || document.hidden;
+      if (busy && ++tries < 90) return setTimeout(wait, 2000);
+      if (!ov.classList.contains('on')) askSheet(over);
+    }
+    setTimeout(wait, 2500);
   }
 
   function apply(pg, pf) {