fix(组件样式): 调整PopupWrapper高度计算和UploadMediaPopup位置及高度

修复PopupWrapper组件中高度计算错误，将固定像素值改为响应式单位
修改UploadMediaPopup弹出位置从右侧改为底部，并设置固定高度为80%

@@ -129,7 +129,7 @@ const contentStyle = computed(() => {
     const style = {};
 
     if (props.showHeader) {
-        style.height = 'calc(100% - 60px)';
+        style.height = 'calc(100% - 130rpx)';
     } else {
         style.height = '100%';
     }

 <!--
  * @Date: 2025-09-22 10:10:44
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-22 11:00:26
+ * @LastEditTime: 2025-09-23 11:17:11
  * @FilePath: /lls_program/src/components/UploadMediaPopup.vue
  * @Description: 文件描述
 -->
 <template>
   <PopupWrapper
     v-model:visible="popupVisible"
-    position="right"
+    position="bottom"
     title="拍照留念"
-    :fullscreen="true"
+    height="80%"
     :close-on-click-overlay="false"
     @close="handleClose"
   >