fix: 修复部署后切换页面 JS chunk 404 白屏问题

- main.ts 监听 vite:preloadError，chunk 加载失败时自动刷新一次
- 新增 ChunkErrorBoundary 组件，捕获 Vue 渲染层 chunk 加载异常
- App.vue 包裹 ChunkErrorBoundary
- docker/nginx.conf 修复缓存策略：index.html 不缓存，/assets/ 长缓存 immutable

src/App.vue

@@ -1,7 +1,9 @@
 <template>
-  <ElConfigProvider size="default" :locale="locales[language]" :z-index="3000">
-    <RouterView></RouterView>
-  </ElConfigProvider>
+  <ChunkErrorBoundary>
+    <ElConfigProvider size="default" :locale="locales[language]" :z-index="3000">
+      <RouterView></RouterView>
+    </ElConfigProvider>
+  </ChunkErrorBoundary>
 </template>
 
 <script setup lang="ts">
@@ -13,6 +15,7 @@
   import { ApiStatus } from './utils/http/status'
   import { setThemeTransitionClass } from '@/utils'
   import { checkStorageCompatibility } from '@/utils'
+  import ChunkErrorBoundary from '@/components/core/others/ChunkErrorBoundary.vue'
 
   const userStore = useUserStore()
   const { language } = storeToRefs(userStore)