refactor: 整理组件目录结构

- TransactionDetail, CategoryBillPopup 移入 Transaction/
- BudgetTypeTabs 移入 Budget/
- GlassBottomNav, ModernEmpty 移入 Global/
- Icon, IconSelector, ClassifySelector 等 8 个通用组件移入 Common/
- 更新所有相关引用路径

Web/src/views/calendarV2/Index.vue

@@ -75,7 +75,7 @@
 import { ref, onMounted, onBeforeUnmount, onActivated, onDeactivated } from 'vue'
 import { useRouter } from 'vue-router'
 import { showToast } from 'vant'
-import CalendarHeader from '@/components/DateSelectHeader.vue'
+import CalendarHeader from '@/components/Common/DateSelectHeader.vue'
 import CalendarModule from './modules/Calendar.vue'
 import StatsModule from './modules/Stats.vue'
 import TransactionListModule from './modules/TransactionList.vue'