fix(intelligent-eval): P0 UI/UX refresh defects (audit)

UI/UX 全面盘点（.scratch/ui-ux-audit.md）P0 功能缺陷修复：
- DecisionProcess/ConfigSnapshots：useState(()=>load()) 一次性加载改为
  useEffect 依赖 evalId（切评估重拉）+ 头部补 ReloadOutlined 刷新按钮
- useRunSession：自写 setInterval(3000) 轮询改 usePolling（pauseWhenHidden
  默认开启：后台标签页暂停、回前台立即刷新）；selectedIdRef 守卫保留防串；
  删除 pollRef/clearPolling
- useFiles：接入 useOnTabActive('/files')，keep-alive 跳回自动刷新
tsc 0 错误 vitest 19 passed

frontend/web/src/components/intelligent_eval/ConfigSnapshots.tsx

@@ -1,9 +1,9 @@
-import { useState } from 'react'
+import { useEffect, useState } from 'react'
 import {
   Button, Card, Descriptions, Empty, Space, Table, Tag, message,
 } from 'antd'
 import type { ColumnsType } from 'antd/es/table'
-import { ArrowLeftOutlined, DiffOutlined } from '@ant-design/icons'
+import { ArrowLeftOutlined, DiffOutlined, ReloadOutlined } from '@ant-design/icons'
 import { intelligentEvalsApi, type ConfigSnapshot, type ConfigSnapshotComparison } from '../../api'
 import { colors } from '../../tokens'
 import { formatDateTime } from '../../utils/date'
@@ -40,9 +40,10 @@ export default function ConfigSnapshots({ evalId, onBack }: ConfigSnapshotsProps
     }
   }
 
-  useState(() => {
-    void loadSnapshots()
-  })
+  useEffect(() => {
+    if (evalId) void loadSnapshots()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [evalId])
 
   const handleViewDetail = async (snapshot: ConfigSnapshot) => {
     try {
@@ -244,6 +245,7 @@ export default function ConfigSnapshots({ evalId, onBack }: ConfigSnapshotsProps
         {onBack && <Button icon={<ArrowLeftOutlined />} onClick={onBack}>返回</Button>}
         <span style={{ fontSize: 16, fontWeight: 600 }}>配置历史</span>
         <div style={{ flex: 1 }} />
+        <Button icon={<ReloadOutlined />} onClick={() => void loadSnapshots()}>刷新</Button>
         <Button
           icon={<DiffOutlined />}
           disabled={selectedForCompare.length !== 2}

frontend/web/src/components/intelligent_eval/DecisionProcess.tsx

@@ -1,9 +1,9 @@
-import { useState } from 'react'
+import { useEffect, useState } from 'react'
 import {
   Button, Card, Empty, Select, Table, Tag, Timeline, message,
 } from 'antd'
 import type { ColumnsType } from 'antd/es/table'
-import { ArrowLeftOutlined, DownloadOutlined } from '@ant-design/icons'
+import { ArrowLeftOutlined, DownloadOutlined, ReloadOutlined } from '@ant-design/icons'
 import { intelligentEvalsApi, type DecisionLog } from '../../api'
 import { colors } from '../../tokens'
 import { formatDateTime } from '../../utils/date'
@@ -38,9 +38,10 @@ export default function DecisionProcess({ evalId, onBack }: DecisionProcessProps
     }
   }
 
-  useState(() => {
-    void loadLogs()
-  })
+  useEffect(() => {
+    if (evalId) void loadLogs()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [evalId])
 
   const handleExport = () => {
     if (!logs) return
@@ -120,6 +121,7 @@ export default function DecisionProcess({ evalId, onBack }: DecisionProcessProps
             { label: '开始分析', value: 'start_analysis' },
           ]}
         />
+        <Button icon={<ReloadOutlined />} onClick={() => void loadLogs()}>刷新</Button>
         <Button icon={<DownloadOutlined />} onClick={handleExport}>导出</Button>
       </div>
 

frontend/web/src/hooks/useFiles.ts

@@ -6,13 +6,14 @@ import {
   type FileUploadConfig,
 } from '../api'
 import { categoryContains, findCategory } from '../utils/fileTree'
+import { useOnTabActive } from './useOnTabActive'
 
 const DEFAULT_CONFIG: FileUploadConfig = {
   allowed_extensions: [],
   max_upload_size_mb: 50,
 }
 
-export function useFiles() {
+export function useFiles(tabPath?: string) {
   const [categories, setCategories] = useState<FileCategory[]>([])
   const [files, setFiles] = useState<FileRecord[]>([])
   const [config, setConfig] = useState<FileUploadConfig>(DEFAULT_CONFIG)
@@ -46,6 +47,11 @@ export function useFiles() {
     void Promise.allSettled([loadCategories(), loadFiles(), loadConfig()])
   }, [loadCategories, loadConfig, loadFiles])
 
+  // keep-alive 下 tab 重新激活时刷新（跳走再回来数据不过期）
+  useOnTabActive(tabPath ?? '', () => {
+    if (tabPath) void refresh()
+  })
+
   const selectCategory = useCallback((categoryId: string | null) => {
     setSelectedCategoryId(categoryId)
     void loadFiles(categoryId)

frontend/web/src/hooks/useRunSession.ts

@@ -5,6 +5,7 @@ import {
   sessionReducer,
   type WsEvent,
 } from './sessionReducer'
+import { usePolling } from './usePolling'
 
 // WebSocket reconnect config
 const WS_MAX_RETRIES = 5
@@ -81,18 +82,10 @@ export function useRunSession(): RunSession {
   const [state, dispatch] = useReducer(sessionReducer, initialSessionState)
 
   const wsRef = useRef<WebSocket | null>(null)
-  const pollRef = useRef<number | null>(null)
   const selectedIdRef = useRef<string | null>(null)
   const reconnectTimerRef = useRef<number | null>(null)
   const reconnectCountRef = useRef<number>(0)
 
-  const clearPolling = () => {
-    if (pollRef.current) {
-      window.clearInterval(pollRef.current)
-      pollRef.current = null
-    }
-  }
-
   const clearReconnect = () => {
     if (reconnectTimerRef.current) {
       window.clearTimeout(reconnectTimerRef.current)
@@ -174,7 +167,6 @@ export function useRunSession(): RunSession {
 
   const select = useCallback((r: Run | null, opts?: { live?: boolean }) => {
     closeWs()
-    clearPolling()
     dispatch({ type: 'RESET' })
     setRun(r)
     selectedIdRef.current = r?.id ?? null
@@ -250,21 +242,17 @@ export function useRunSession(): RunSession {
     } catch { /* noop */ }
   }, [run])
 
-  // Poll during live runs to keep the Run object fresh (status/summary/completed_at)
-  useEffect(() => {
-    if (!state.isLive || !run) {
-      clearPolling()
-      return
-    }
-    pollRef.current = window.setInterval(() => {
+  // Poll during live runs to keep the Run object fresh (status/summary/completed_at).
+  // usePolling 统一轮询：pauseWhenHidden 默认开启，后台标签页暂停、回到前台立即刷新。
+  usePolling(() => {
+    if (run && selectedIdRef.current === run.id) {
       runsApi.get(run.id).then((res) => {
         if (selectedIdRef.current === run.id) setRun(res.data)
       }).catch(() => { /* noop */ })
-    }, 3000)
-    return () => clearPolling()
-  }, [state.isLive, run?.id])
+    }
+  }, 3000, state.isLive && run != null)
 
-  useEffect(() => () => { closeWs(); clearPolling(); clearReconnect() }, [])
+  useEffect(() => () => { closeWs(); clearReconnect() }, [])
 
   return {
     run,

frontend/web/src/pages/Files.tsx

@@ -37,7 +37,7 @@ export default function FilesPage() {
     uploadFiles,
     deleteFile,
     downloadFile,
-  } = useFiles()
+  } = useFiles('/files')
   const [uploadOpen, setUploadOpen] = useState(false)
   const [categoryDialog, setCategoryDialog] = useState<CategoryDialogState>(CLOSED_CATEGORY_DIALOG)
   const [categorySaving, setCategorySaving] = useState(false)