refactor: 前端构建按需化与 Mock 懒加载

移除全量 Element Plus 与全局 VChart 注册，改为按需引入样式与组件内局部图表；Mock 适配器改为按 VITE_ENABLE_MOCK 环境变量懒加载，生产默认不拦截请求；ECharts 精简为看板所需图表，各视图与 stores 同步适配。

frontend/src/views/fine-tune/FineTuneListView.vue

@@ -1,9 +1,10 @@
 <script setup lang="ts">
-import { ref, computed, onMounted, onUnmounted } from 'vue'
+import { ref, computed, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { ElMessage } from 'element-plus'
 import DataTablePage from '@/components/DataTablePage.vue'
 import ModelStatusTag from '@/components/ModelStatusTag.vue'
+import { usePolling } from '@/composables/usePolling'
 import { useModelsStore } from '@/stores/models'
 import {
   getFineTuneList,
@@ -44,14 +45,10 @@ const filteredList = computed(() => {
   })
 })
 
-let progressTimer: ReturnType<typeof setInterval> | null = null
-
 async function loadData() {
   loading.value = true
   try {
     dataList.value = (await getFineTuneList()) || []
-    // 列表加载完成后，立即获取一次运行中任务的进度
-    refreshProgress()
   } catch {
     // 拦截器已提示
   } finally {
@@ -101,14 +98,13 @@ function formatDateTime(value?: string) {
   return new Date(value).toLocaleString('zh-CN', { hour12: false })
 }
 
-onMounted(() => {
-  modelsStore.load()
-  loadData()
-  progressTimer = setInterval(refreshProgress, 5000)
-})
+const { start: startProgressPolling } = usePolling(refreshProgress, 5000, { immediate: false })
 
-onUnmounted(() => {
-  if (progressTimer) clearInterval(progressTimer)
+onMounted(async () => {
+  void modelsStore.load()
+  await loadData()
+  await refreshProgress()
+  startProgressPolling()
 })
 </script>