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/router/index.js

@@ -1,6 +1,5 @@
 import { createRouter, createWebHistory } from 'vue-router'
 import { useAuthStore } from '@/stores/auth'
-import { useVersionStore } from '@/stores/version'
 
 const router = createRouter({
   history: createWebHistory(import.meta.env.BASE_URL),
@@ -29,12 +28,6 @@ const router = createRouter({
       component: () => import('../views/SettingView.vue'),
       meta: { requiresAuth: true }
     },
-    {
-      path: '/calendar',
-      name: 'calendar',
-      component: () => import('../views/CalendarView.vue'),
-      meta: { requiresAuth: true }
-    },
     {
       path: '/calendar-v2',
       name: 'calendar-v2',
@@ -65,12 +58,6 @@ const router = createRouter({
       component: () => import('../views/ClassificationNLP.vue'),
       meta: { requiresAuth: true }
     },
-    {
-      path: '/',
-      name: 'statistics',
-      component: () => import('../views/statisticsV1/Index.vue'),
-      meta: { requiresAuth: true }
-    },
     {
       path: '/statistics-v2',
       name: 'statistics-v2',
@@ -101,12 +88,6 @@ const router = createRouter({
       component: () => import('../views/LogView.vue'),
       meta: { requiresAuth: true }
     },
-    {
-      path: '/budget',
-      name: 'budget',
-      component: () => import('../views/BudgetView.vue'),
-      meta: { requiresAuth: true }
-    },
     {
       path: '/budget-v2',
       name: 'budget-v2',
@@ -132,7 +113,6 @@ const router = createRouter({
 // 路由守卫
 router.beforeEach((to, from, next) => {
   const authStore = useAuthStore()
-  const versionStore = useVersionStore()
   const requiresAuth = to.meta.requiresAuth !== false // 默认需要认证
 
   if (requiresAuth && !authStore.isAuthenticated) {
@@ -140,35 +120,8 @@ router.beforeEach((to, from, next) => {
     next({ name: 'login', query: { redirect: to.fullPath } })
   } else if (to.name === 'login' && authStore.isAuthenticated) {
     // 已登录用户访问登录页，跳转到首页
-    next({ name: 'transactions' })
+    next({ name: 'statistics-v2' })
   } else {
-    // 版本路由处理
-    if (versionStore.isV2()) {
-      // 如果当前选择 V2，尝试跳转到 V2 路由
-      const routeName = to.name?.toString()
-      if (routeName && !routeName.endsWith('-v2')) {
-        const v2RouteName = `${routeName}-v2`
-        const v2Route = router.getRoutes().find(route => route.name === v2RouteName)
-
-        if (v2Route) {
-          next({ name: v2RouteName, query: to.query, params: to.params })
-          return
-        }
-      }
-    } else {
-      // 如果当前选择 V1，且访问的是 V2 路由，跳转到 V1
-      const routeName = to.name?.toString()
-      if (routeName && routeName.endsWith('-v2')) {
-        const v1RouteName = routeName.replace(/-v2$/, '')
-        const v1Route = router.getRoutes().find(route => route.name === v1RouteName)
-
-        if (v1Route) {
-          next({ name: v1RouteName, query: to.query, params: to.params })
-          return
-        }
-      }
-    }
-
     next()
   }
 })