feat: 在播放控制器中优化日期选择器，增加自定义样式和类型处理，提升用户体验

src/components/PlaybackController.vue

@@ -210,8 +210,9 @@ const handleTimelineClick = (event: MouseEvent) => {
         <a-date-picker
           :value="selectedDate"
           placeholder="请选择回放日期"
-          @change="handleDateChange"
+          @change="handleDateChange as any"
           style="margin-right: 8px"
+          dropdownClassName="playback-datepicker-theme"
         />
         <a-select :value="selectedHour" style="width: 150px" :options="hourOptions" @change="handleHourChange" />
       </a-col>
@@ -340,3 +341,22 @@ body[data-theme='dark'] {
   }
 }
 </style>
+
+<style lang="scss">
+.playback-datepicker-theme {
+  .ant-picker-cell-in-view.ant-picker-cell-today .ant-picker-cell-inner::before {
+    border-color: #0dbb8a !important; /* Today indicator */
+  }
+  .ant-picker-cell-in-view.ant-picker-cell-selected .ant-picker-cell-inner {
+    background-color: #0dbb8a !important; /* Selected date background */
+  }
+  .ant-picker-cell-in-view.ant-picker-cell-selected .ant-picker-cell-inner .ant-picker-calendar-date-value {
+    color: white !important; /* Text color for selected date */
+  }
+
+  .ant-picker-today-btn {
+    color: #0dbb8a !important; /* "Today" button text color */
+  }
+}
+</style>
+