添加部分钩子函数，便于代码维护

src/views/home/rainstorm/RainstormView.vue

@@ -20,20 +20,16 @@
 </template>
 
 <script setup lang="ts">
-  // 1. 只导入子组件
   import BasicComponent from '@/component/rain-earthquake/BasicComponent.vue';
   import DisasterChainPointComponent from '@/component/rain-earthquake/DisasterChainPointComponent.vue';
   import LegendComponent from '@/component/rain-earthquake/LegendComponent.vue';
   import { useRainDisasterChain } from '@/hooks/rainstorm/useRainDisasterChain';
   import { useRainLegend } from '@/hooks/rainstorm/useRainLegend';
-
-  // 2. 只导入核心类型/枚举
   import { DisasterType } from '@/types/common/DisasterType';
   import { useRoute } from 'vue-router';
 
   const route = useRoute();
 
-  // 4. 执行钩子，拿到所有需要的数据
   const {
     selectOptions,
     tableDatas,