feat(performance): 前端合并报告页面 ProjectReport.vue + 项目详情页查看合并报告入口

- 新增 ProjectReport.vue 合并报告页面（聚合指标卡片 4×16 + 分位数表 + 状态码分布 + 各任务明细表）
- 注册合并报告路由 /performance/project-report
- ProjectDetail.vue 批量执行完成后显示查看合并报告按钮 + 历史报告入口
Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/router/index.ts

@@ -193,6 +193,12 @@ const routes: RouteRecordRaw[] = [
         component: () => import('@/views/performance/ReportPanel.vue'),
         meta: { title: '报告查看' }
       },
+      {
+        path: 'project-report',
+        name: 'PerfProjectReport',
+        component: () => import('@/views/performance/ProjectReport.vue'),
+        meta: { title: '合并报告' }
+      },
       {
         path: 'presets',
         name: 'PerfPresets',

frontend/src/views/performance/ProjectDetail.vue

@@ -26,6 +26,12 @@
         <el-button v-if="selectedIds.length > 0" type="warning" :loading="runningBatch" @click="handleBatchRun">
           <el-icon><VideoPlay /></el-icon>批量执行（{{ selectedIds.length }}）
         </el-button>
+        <el-button v-if="lastReportId" type="success" @click="viewMergedReport(lastReportId)">
+          <el-icon><Document /></el-icon>查看合并报告
+        </el-button>
+        <el-button @click="viewHistoryReports">
+          <el-icon><List /></el-icon>历史报告
+        </el-button>
         <el-button @click="loadTasks">
           <el-icon><Refresh /></el-icon>刷新
         </el-button>
@@ -182,7 +188,7 @@
 import { ref, onMounted, onUnmounted, computed } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { ArrowLeft, VideoPlay, Refresh } from '@element-plus/icons-vue'
+import { ArrowLeft, VideoPlay, Refresh, Document, List } from '@element-plus/icons-vue'
 import { getProject, listTasks, runTask, stopTask, deleteTask, runProjectAll, batchRunTasks } from '@/api/performance'
 import type { PerformanceProject, PerformanceTaskListItem } from '@/types/performance'
 
@@ -214,6 +220,7 @@ const batchTotalCount = ref(0)
 const batchCurrentTaskName = ref('')
 const batchSuccessCount = ref(0)
 const batchFailCount = ref(0)
+const lastReportId = ref<string | null>(null) // 最近一次批量执行生成的合并报告 ID
 const batchProgressPercent = computed(() => {
   if (batchTotalCount.value === 0) return 0
   return Math.round((batchCurrentIndex.value / batchTotalCount.value) * 100)
@@ -312,10 +319,14 @@ async function handleRunAll() {
   if (confirmed === null) return
 
   runningAll.value = true
+  lastReportId.value = null
   showBatchProgress(tasks.value.length)
   try {
     const res = await runProjectAll(projectId.value)
     ElMessage.success(res.message || '项目已开始执行')
+    if (res.reportId) {
+      lastReportId.value = res.reportId
+    }
   } catch (e: any) {
     ElMessage.error('执行失败: ' + (e.response?.data?.detail || e.message || ''))
   } finally {
@@ -338,10 +349,14 @@ async function handleBatchRun() {
   if (confirmed === null) return
 
   runningBatch.value = true
+  lastReportId.value = null
   showBatchProgress(selectedIds.value.length)
   try {
     const res = await batchRunTasks({ taskIds: selectedIds.value, projectId: projectId.value })
     ElMessage.success(res.message || '批量执行完成')
+    if (res.reportId) {
+      lastReportId.value = res.reportId
+    }
     selectedIds.value = []
     tableRef.value?.clearSelection()
     await loadTasks()
@@ -415,6 +430,16 @@ function modeLabel(mode: string) {
   return map[mode] || mode
 }
 
+/** 跳转合并报告 */
+function viewMergedReport(reportId: string) {
+  router.push(`/performance/project-report?reportId=${reportId}&projectId=${projectId.value}`)
+}
+
+/** 跳转历史报告列表 */
+function viewHistoryReports() {
+  router.push(`/performance/project-report?projectId=${projectId.value}`)
+}
+
 /** 格式化时间 */
 function formatTime(t: string) {
   return t?.replace('T', ' ').substring(0, 19) || ''