feat: remove V1 calendar/budget/stats modules

- 删除 V1 前端页面 (CalendarView, BudgetView, statisticsV1)
- 移除 V1 路由配置 (/calendar, /budget, /)
- 清理路由守卫中的 V1 版本切换逻辑
- 移除设置页面中的版本切换功能
- 更新底部导航和登录重定向到 V2 路由
- 移除 App.vue 中 V1 页面的缓存配置
- 删除后端 TransactionRecordController.GetDailyStatisticsAsync (Obsolete)
- 删除 TransactionStatisticsController.GetBalanceStatisticsAsync
- 保留 V2 仍在使用的共享 API (GetUncoveredCategories, GetArchiveSummary, GetDailyStatistics)
- 保留 V2 使用的全局事件监听机制
- 所有测试通过 (210/210)

Breaking Change: V1 API 端点和路由将不可用

Web/src/views/SettingView.vue

@@ -115,12 +115,6 @@
           is-link
           @click="handleScheduledTasks"
         />
-        <van-cell
-          title="切换版本"
-          is-link
-          :value="versionStore.currentVersion.toUpperCase()"
-          @click="handleVersionSwitch"
-        />
       </van-cell-group>
 
       <div
@@ -145,16 +139,14 @@
 <script setup>
 import { ref, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
-import { showLoadingToast, showSuccessToast, showToast, closeToast, showConfirmDialog, showDialog } from 'vant'
+import { showLoadingToast, showSuccessToast, showToast, closeToast, showConfirmDialog } from 'vant'
 import { uploadBillFile } from '@/api/billImport'
 import { useAuthStore } from '@/stores/auth'
-import { useVersionStore } from '@/stores/version'
 import { getVapidPublicKey, subscribe, testNotification } from '@/api/notification'
 import { updateServiceWorker } from '@/registerServiceWorker'
 
 const router = useRouter()
 const authStore = useAuthStore()
-const versionStore = useVersionStore()
 
 const fileInputRef = ref(null)
 const currentType = ref('')
@@ -390,64 +382,6 @@ const handleReloadFromNetwork = async () => {
 const handleScheduledTasks = () => {
   router.push({ name: 'scheduled-tasks' })
 }
-
-/**
- * 处理版本切换
- */
-const handleVersionSwitch = async () => {
-  try {
-    await showDialog({
-      title: '选择版本',
-      message: '请选择要使用的版本',
-      showCancelButton: true,
-      confirmButtonText: 'V2',
-      cancelButtonText: 'V1'
-    }).then(() => {
-      // 选择 V2
-      versionStore.setVersion('v2')
-      showSuccessToast('已切换到 V2')
-      // 尝试跳转到当前路由的 V2 版本
-      redirectToVersionRoute()
-    }).catch(() => {
-      // 选择 V1
-      versionStore.setVersion('v1')
-      showSuccessToast('已切换到 V1')
-      // 尝试跳转到当前路由的 V1 版本
-      redirectToVersionRoute()
-    })
-  } catch (error) {
-    console.error('版本切换失败:', error)
-  }
-}
-
-/**
- * 根据当前版本重定向路由
- */
-const redirectToVersionRoute = () => {
-  const currentRoute = router.currentRoute.value
-  const currentRouteName = currentRoute.name
-
-  if (versionStore.isV2()) {
-    // 尝试跳转到 V2 路由
-    const v2RouteName = `${currentRouteName}-v2`
-    const v2Route = router.getRoutes().find(route => route.name === v2RouteName)
-
-    if (v2Route) {
-      router.push({ name: v2RouteName })
-    }
-    // 如果没有 V2 路由，保持当前路由
-  } else {
-    // V1 版本：如果当前在 V2 路由，跳转到 V1
-    if (currentRouteName && currentRouteName.toString().endsWith('-v2')) {
-      const v1RouteName = currentRouteName.toString().replace(/-v2$/, '')
-      const v1Route = router.getRoutes().find(route => route.name === v1RouteName)
-
-      if (v1Route) {
-        router.push({ name: v1RouteName })
-      }
-    }
-  }
-}
 </script>
 
 <style scoped>