Fix iOS scrolling issue when create supply modal is open

supply.html

@@ -461,6 +461,8 @@
             flex-direction: column;
             z-index: 1000;
             overflow: hidden;
+            /* 防止iOS滚动穿透 */
+            touch-action: none;
         }
         
         .modal.active {
@@ -478,15 +480,29 @@
             box-shadow: none;
             display: flex;
             flex-direction: column;
+            /* 启用iOS原生滚动 */
             -webkit-overflow-scrolling: touch;
             overscroll-behavior: contain;
+            /* 允许触摸操作 */
+            touch-action: auto;
         }
         
         .modal-body {
             flex: 1;
             overflow-y: auto;
+            /* 启用iOS原生滚动 */
             -webkit-overflow-scrolling: touch;
             overscroll-behavior: contain;
+            /* 允许触摸操作 */
+            touch-action: auto;
+        }
+        
+        /* iOS滚动穿透修复 */
+        body.modal-open {
+            position: fixed;
+            width: 100%;
+            height: 100%;
+            overflow: hidden;
         }
         
         .modal-header {
@@ -5816,10 +5832,13 @@
                 }, { passive: true });
                 
                 modalContent.addEventListener('touchmove', function(e) {
-                    if ((this.allowUp && e.touches[0].pageY < e.changedTouches[0].pageY) || 
+                    // 检查滚动位置，只在需要时阻止滚动
-                        (this.allowDown && e.touches[0].pageY > e.changedTouches[0].pageY)) {
+                    const isAtTop = (this.scrollTop === 0);
-                        e.stopPropagation();
+                    const isAtBottom = (this.scrollTop === this.scrollHeight - this.clientHeight);
-                    } else {
+                    
+                    // 如果在顶部且尝试向上滚动，或在底部且尝试向下滚动，阻止滚动
+                    if ((isAtTop && e.touches[0].pageY > e.changedTouches[0].pageY) || 
+                        (isAtBottom && e.touches[0].pageY < e.changedTouches[0].pageY)) {
                         e.preventDefault();
                     }
                 }, { passive: false });
@@ -5976,12 +5995,25 @@
             
             // 定义触摸事件监听器
             touchMoveListener = function(e) {
-                // 只阻止页面滚动，不阻止模态框内的滚动
+                // 获取触摸目标
                 const target = e.target;
                 const createSupplyModal = document.getElementById('createSupplyModal');
                 
-                // 如果触摸目标在模态框内，允许滚动
+                // 如果触摸目标在模态框内，检查是否需要阻止滚动
                 if (createSupplyModal && createSupplyModal.contains(target)) {
+                    // 获取模态框内容元素
+                    const modalContent = document.querySelector('#createSupplyModal .modal-content');
+                    if (modalContent) {
+                        // 检查滚动位置，只在需要时阻止滚动
+                        const isAtTop = (modalContent.scrollTop === 0);
+                        const isAtBottom = (modalContent.scrollTop === modalContent.scrollHeight - modalContent.clientHeight);
+                        
+                        // 如果在顶部且尝试向上滚动，或在底部且尝试向下滚动，阻止滚动
+                        if ((isAtTop && e.touches[0].pageY > e.changedTouches[0].pageY) || 
+                            (isAtBottom && e.touches[0].pageY < e.changedTouches[0].pageY)) {
+                            e.preventDefault();
+                        }
+                    }
                     return;
                 }
                 
@@ -6014,6 +6046,7 @@
             document.body.style.position = '';
             document.body.style.width = '';
             document.body.style.height = '';
+            document.body.style.touchAction = '';
             
             // 恢复iOS页面滚动
             restoreiOSScrolling();