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/components/Bill/BillForm.vue

@@ -132,7 +132,7 @@
 import { ref, onMounted, watch, nextTick } from 'vue'
 import { showToast } from 'vant'
 import dayjs from 'dayjs'
-import ClassifySelector from '@/components/ClassifySelector.vue'
+import ClassifySelector from '@/components/Common/ClassifySelector.vue'
 
 const props = defineProps({
   initialData: {