feat: 优化UI组件样式和交互逻辑

- 为对话框添加背景图片并调整布局
- 修改视频监控组件的小视频切换逻辑
- 调整天气卡片样式增加内边距和背景
- 修复视频监控组件展开/收起状态判断
- 为安全监控页面添加顶部间距

src/assets/styles/dialog.scss

@@ -117,6 +117,13 @@
         color: rgba(227, 39, 39, 1) !important;
     }
 
+    .back {
+        background-image: url("/assets/dialog2.png");
+        background-size: 455px;
+        background-repeat: no-repeat;
+        background-position: 780px -65px;
+    }
+
     .alarm-alert-content {
         background: linear-gradient(180deg, rgba(255, 87, 51, 0.23) 0%, rgba(255, 219, 219, 0) 100%);
         padding-left: 50px;
@@ -130,6 +137,7 @@
             padding: 50px 0;
             padding-bottom: 20px;
 
+
             .info {
                 display: flex;
                 flex-direction: column;