refactor(frontend): extract useCampaignReport hook from Campaigns.tsx

将活动报告抽屉的数据获取逻辑从 Campaigns.tsx 抽离到 useCampaignReport hook。
消除 5 个独立状态变量（report/reportRuns/reportTimeline/analysis/comparison）
和 fetchReport 函数的 25 行样板代码。hook 封装 5 个并行 API 调用和状态管理，
组件只负责渲染和交互。

- 新增 useCampaignReport(campaignId) hook
- 返回 {report, runs, timeline, analysis, comparison, loading, refetch, setAnalysis, setComparison}
- Campaigns.tsx 从 1122 行缩减状态管理复杂度
- TypeScript 类型检查通过，后端测试全绿

frontend/web/src/hooks/useCampaignReport.ts

@@ -0,0 +1,77 @@
+import { useState, useCallback, type Dispatch, type SetStateAction } from 'react'
+import { campaignsApi, runsApi, type CampaignReport, type Run, type CampaignTimelineEntry, type CampaignAnalysis, type CampaignComparison } from '../api'
+
+interface CampaignReportData {
+  report: CampaignReport | null
+  runs: Run[]
+  timeline: CampaignTimelineEntry[]
+  analysis: CampaignAnalysis | null
+  comparison: CampaignComparison | null
+  loading: boolean
+}
+
+interface UseCampaignReportResult extends CampaignReportData {
+  refetch: (silent?: boolean) => Promise<void>
+  setAnalysis: Dispatch<SetStateAction<CampaignAnalysis | null>>
+  setComparison: Dispatch<SetStateAction<CampaignComparison | null>>
+}
+
+export function useCampaignReport(campaignId: string | null): UseCampaignReportResult {
+  const [data, setData] = useState<CampaignReportData>({
+    report: null,
+    runs: [],
+    timeline: [],
+    analysis: null,
+    comparison: null,
+    loading: false,
+  })
+
+  const refetch = useCallback(async (silent = false) => {
+    if (!campaignId) return
+    if (!silent) {
+      setData({
+        report: null,
+        runs: [],
+        timeline: [],
+        analysis: null,
+        comparison: null,
+        loading: true,
+      })
+    }
+    try {
+      const [rep, runs, tl, ana, cmp] = await Promise.all([
+        campaignsApi.report(campaignId),
+        runsApi.list(),
+        campaignsApi.timeline(campaignId),
+        campaignsApi.getAnalysis(campaignId),
+        campaignsApi.getComparison(campaignId),
+      ])
+      setData({
+        report: rep.data,
+        runs: runs.data.filter((r) => r.campaign_id === campaignId),
+        timeline: tl.data.entries,
+        analysis: ana.data,
+        comparison: cmp.data,
+        loading: false,
+      })
+    } catch {
+      setData((prev) => ({ ...prev, loading: false }))
+    }
+  }, [campaignId])
+
+  const setAnalysis: Dispatch<SetStateAction<CampaignAnalysis | null>> = (value) => {
+    setData((prev) => ({
+      ...prev,
+      analysis: typeof value === 'function' ? value(prev.analysis) : value,
+    }))
+  }
+
+  const setComparison: Dispatch<SetStateAction<CampaignComparison | null>> = (value) => {
+    setData((prev) => ({
+      ...prev,
+      comparison: typeof value === 'function' ? value(prev.comparison) : value,
+    }))
+  }
+
+  return { ...data, refetch, setAnalysis, setComparison }
+}

frontend/web/src/pages/Campaigns.tsx

@@ -14,10 +14,9 @@ import { Line, Bar } from '@ant-design/charts'
 import PageWrapper from '../components/PageWrapper'
 import StatCard from '../components/StatCard'
 import {
-  campaignsApi, targetsApi, scenariosApi, runsApi, modelConfigsApi,
-  type CampaignListItem, type CampaignReport, type Target, type Scenario, type Run,
-  type CampaignTimelineEntry, type ModelConfig, type CampaignAnalysis,
-  type CampaignComparison,
+  campaignsApi, targetsApi, scenariosApi, modelConfigsApi,
+  type CampaignListItem, type Target, type Scenario, type Run,
+  type CampaignTimelineEntry, type ModelConfig,
 } from '../api'
 import { passRateColor } from '../utils/colors'
 import { shortDateTime, toDate } from '../utils/date'
@@ -28,6 +27,7 @@ import PeriodComparisonSection from '../components/PeriodComparisonSection'
 import ExplorationSection from '../components/ExplorationSection'
 import { useResource } from '../hooks/useResource'
 import { usePolling } from '../hooks/usePolling'
+import { useCampaignReport } from '../hooks/useCampaignReport'
 import { useTabStore } from '../stores/tabStore'
 import { colors, statusColors, statusLabels, triggerColors, triggerLabels } from '../tokens'
 
@@ -154,13 +154,8 @@ export default function CampaignsPage() {
   const derivedScale = scaleFor(!!wRealtime, wWindow, wTargetValue, wTargetUnit)
 
   const [reportOpen, setReportOpen] = useState(false)
-  const [reportLoading, setReportLoading] = useState(false)
-  const [report, setReport] = useState<CampaignReport | null>(null)
-  const [reportRuns, setReportRuns] = useState<Run[]>([])
-  const [reportTimeline, setReportTimeline] = useState<CampaignTimelineEntry[]>([])
-  const [analysis, setAnalysis] = useState<CampaignAnalysis | null>(null)
+  const [reportCampaignId, setReportCampaignId] = useState<string | null>(null)
   const [analysisBusy, setAnalysisBusy] = useState(false)
-  const [comparison, setComparison] = useState<CampaignComparison | null>(null)
 
   const [expandedIds, setExpandedIds] = useState<string[]>([])
   const [timelines, setTimelines] = useState<Record<string, CampaignTimelineEntry[]>>({})
@@ -183,6 +178,11 @@ export default function CampaignsPage() {
   const analysisDefault = chatConfigs.find((m) => m.is_analysis_default)
   const scenarioNames = Object.fromEntries(scenarios.map((s) => [s.id, s.name]))
 
+  const {
+    report, runs: reportRuns, timeline: reportTimeline, analysis, comparison, loading: reportLoading,
+    refetch: fetchReport, setAnalysis, setComparison,
+  } = useCampaignReport(reportOpen ? reportCampaignId : null)
+
   const wPlan = (Form.useWatch('plan', form) as PlanFormEntry[] | undefined) ?? []
   const planMarkers: TimelineMarker[] = wPlan
     .map((e, i) => ({ e, i }))
@@ -277,55 +277,27 @@ export default function CampaignsPage() {
     if (expanded) void fetchTimeline(record.id)
   }
 
-  const fetchReport = async (campaignId: string, silent = false) => {
-    if (!silent) {
-      setReportLoading(true)
-      setReport(null)
-      setReportRuns([])
-      setReportTimeline([])
-      setAnalysis(null)
-      setComparison(null)
-    }
-    try {
-      const [rep, runs, tl, ana, cmp] = await Promise.all([
-        campaignsApi.report(campaignId),
-        runsApi.list(),
-        campaignsApi.timeline(campaignId),
-        campaignsApi.getAnalysis(campaignId),
-        campaignsApi.getComparison(campaignId),
-      ])
-      setReport(rep.data)
-      setReportRuns(runs.data.filter((r) => r.campaign_id === campaignId))
-      setReportTimeline(tl.data.entries)
-      setAnalysis(ana.data)
-      setComparison(cmp.data)
-    } finally {
-      if (!silent) setReportLoading(false)
-    }
-  }
-
   const openReport = (campaign: CampaignListItem) => {
     setReportOpen(true)
-    fetchReport(campaign.id)
+    setReportCampaignId(campaign.id)
   }
 
   // Keep the open report drawer live while its campaign is still running.
-  const reportId = report?.campaign_id ?? null
   const reportCampaignActive = campaigns.some(
-    (c) => c.id === reportId && isActiveStatus(c.status),
+    (c) => c.id === reportCampaignId && isActiveStatus(c.status),
   )
   usePolling(
-    () => { if (reportId) void fetchReport(reportId, true) },
+    () => { if (reportCampaignId) void fetchReport(true) },
     POLL_INTERVAL_MS,
-    activeKey === '/campaigns' && reportOpen && !!reportId && reportCampaignActive,
+    activeKey === '/campaigns' && reportOpen && !!reportCampaignId && reportCampaignActive,
   )
 
   const generateAnalysis = async () => {
-    if (!reportId) return
+    if (!reportCampaignId) return
     setAnalysisBusy(true)
     try {
-      await campaignsApi.generateAnalysis(reportId)
-      const res = await campaignsApi.getAnalysis(reportId)
+      await campaignsApi.generateAnalysis(reportCampaignId)
+      const res = await campaignsApi.getAnalysis(reportCampaignId)
       setAnalysis(res.data)
     } finally {
       setAnalysisBusy(false)
@@ -335,28 +307,28 @@ export default function CampaignsPage() {
   // 分析后台任务进行时轮询，直到进入 completed/failed 终态。
   usePolling(
     () => {
-      if (!reportId) return
-      void campaignsApi.getAnalysis(reportId).then((res) => setAnalysis(res.data))
+      if (!reportCampaignId) return
+      void campaignsApi.getAnalysis(reportCampaignId).then((res) => setAnalysis(res.data))
     },
     POLL_INTERVAL_MS,
-    activeKey === '/campaigns' && reportOpen && !!reportId && analysis?.status === 'generating',
+    activeKey === '/campaigns' && reportOpen && !!reportCampaignId && analysis?.status === 'generating',
   )
 
   const generateComparison = async (baselineCampaignId?: string) => {
-    if (!reportId) return
-    await campaignsApi.generateComparison(reportId, baselineCampaignId)
-    const res = await campaignsApi.getComparison(reportId)
+    if (!reportCampaignId) return
+    await campaignsApi.generateComparison(reportCampaignId, baselineCampaignId)
+    const res = await campaignsApi.getComparison(reportCampaignId)
     setComparison(res.data)
   }
 
   // 对比生成中同样轮询，直到 completed/failed。
   usePolling(
     () => {
-      if (!reportId) return
-      void campaignsApi.getComparison(reportId).then((res) => setComparison(res.data))
+      if (!reportCampaignId) return
+      void campaignsApi.getComparison(reportCampaignId).then((res) => setComparison(res.data))
     },
     POLL_INTERVAL_MS,
-    activeKey === '/campaigns' && reportOpen && !!reportId && comparison?.status === 'generating',
+    activeKey === '/campaigns' && reportOpen && !!reportCampaignId && comparison?.status === 'generating',
   )
 
   // Grow the expanded timeline of any still-running campaign as new child Runs
@@ -564,7 +536,7 @@ export default function CampaignsPage() {
   }
 
   // ── 智能分析区块 ─────────────────────────────────────────────────────
-  const reportCampaign = campaigns.find((c) => c.id === reportId)
+  const reportCampaign = campaigns.find((c) => c.id === reportCampaignId)
   const analysisTerminal = !!report && !isActiveStatus(report.status)
   const analysisModelMissing = !reportCampaign?.analysis_model_config_id && !analysisDefault
   const analysisModelName = analysis?.model_config_id