refactor: 改用router.push并清除路由守卫缓存替代window.location.href

- 添加resetInstallCheck()清除安装状态缓存
- 安装完成后调用resetInstallCheck再router.push跳转
- 保持SPA无刷新体验

frontend/src/pages/install/index.vue

@@ -4,6 +4,8 @@ import { computed, onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { toast } from 'vue-sonner'
 
+import { resetInstallCheck } from '@/router/guard/index'
+
 const router = useRouter()
 
 const loading = ref(false)
@@ -42,7 +44,8 @@ async function checkInstallStatus() {
     const data = await res.json()
     installStatus.value = data?.data
     if (data?.data?.installed) {
-      window.location.href = '/login'
+      resetInstallCheck()
+      router.push('/login')
     }
   }
   catch (error) {
@@ -162,7 +165,8 @@ function goNext() {
 }
 
 function goLogin() {
-  window.location.href = '/login'
+  resetInstallCheck()
+  router.push('/login')
 }
 
 onMounted(() => {

frontend/src/router/guard/index.ts

@@ -3,6 +3,11 @@ import type { Router } from 'vue-router'
 let installChecked = false
 let isInstalled = false
 
+export function resetInstallCheck() {
+  installChecked = false
+  isInstalled = false
+}
+
 async function checkInstallStatus(): Promise<boolean> {
   if (installChecked) return isInstalled
   try {