fix: 批量日志补全操作列 — 新增停止按钮

- 表头补全"操作"列（此前数据行有对应单元格但表头缺失导致列不显示）
- 运行中/待启动的任务显示停止按钮（StopCircleIcon），点击后调用
  cancelJob 并刷新日志列表，停止中显示 CircularProgress
- 同步更新当前追踪的 batchJob 状态
- colSpan 更新为 9（含新操作列）
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/pages/MatchingPage.tsx

@@ -2,7 +2,7 @@ import { useState, useEffect, useCallback } from 'react'
 import {
   Box, Typography, Card, CardContent, CardHeader, Grid,
   FormControl, InputLabel, Select, MenuItem, Stack,
-  Tabs, Tab, Alert, Divider, LinearProgress, Chip, Button,
+  Tabs, Tab, Alert, Divider, LinearProgress, Chip, Button, CircularProgress,
   Table, TableBody, TableCell, TableHead, TableRow,
   Collapse, IconButton, Tooltip, TablePagination,
 } from '@mui/material'
@@ -14,6 +14,7 @@ import { PermissionButton } from '../components/auth/PermissionButton'
 import PsychologyIcon from '@mui/icons-material/Psychology'
 import BatchPredictionIcon from '@mui/icons-material/BatchPrediction'
 import StopIcon from '@mui/icons-material/Stop'
+import StopCircleIcon from '@mui/icons-material/StopCircle'
 import { MatchingStepper } from '../components/matching/MatchingStepper'
 import { MatchingResultCard } from '../components/matching/MatchingResultCard'
 import { ReasoningTimeline } from '../components/matching/ReasoningTimeline'
@@ -74,6 +75,7 @@ export function MatchingPage() {
   const [logTotal, setLogTotal] = useState(0)
   const [logPage, setLogPage] = useState(0)
   const [expandedErrorId, setExpandedErrorId] = useState<string | null>(null)
+  const [cancellingJobId, setCancellingJobId] = useState<string | null>(null)
 
   const loadJobHistory = useCallback(async (page = 0) => {
     // fetch PAGE_SIZE+1 to detect if a next page exists
@@ -163,6 +165,21 @@ export function MatchingPage() {
     }
   }
 
+  const handleCancelFromLog = async (job: BatchJob) => {
+    setCancellingJobId(job.id)
+    try {
+      const updated = await batchMatchingService.cancelJob(job.id)
+      // 如果是当前追踪的 job，同步状态
+      if (batchJob?.id === job.id) setBatchJob(updated)
+      loadJobHistory(logPage)
+    } catch (e: unknown) {
+      const msg = e instanceof Error ? e.message : '停止失败'
+      setBatchError(msg)
+    } finally {
+      setCancellingJobId(null)
+    }
+  }
+
   const handleLogPageChange = (_: unknown, newPage: number) => {
     setLogPage(newPage)
     loadJobHistory(newPage)
@@ -322,6 +339,7 @@ export function MatchingPage() {
                       <TableCell>触发时间</TableCell>
                       <TableCell>完成时间</TableCell>
                       <TableCell>耗时</TableCell>
+                      <TableCell align="center">操作</TableCell>
                     </TableRow>
                   </TableHead>
                   <TableBody>
@@ -387,10 +405,28 @@ export function MatchingPage() {
                                 {formatDuration(job.created_at, job.completed_at)}
                               </Typography>
                             </TableCell>
+                            <TableCell align="center">
+                              {(job.status === 'running' || job.status === 'pending') && (
+                                <Tooltip title={job.cancel_requested ? '停止中...' : '停止该任务'}>
+                                  <span>
+                                    <IconButton
+                                      size="small"
+                                      color="error"
+                                      disabled={!!job.cancel_requested || cancellingJobId === job.id}
+                                      onClick={() => handleCancelFromLog(job)}
+                                    >
+                                      {cancellingJobId === job.id
+                                        ? <CircularProgress size={14} color="error" />
+                                        : <StopCircleIcon fontSize="small" />}
+                                    </IconButton>
+                                  </span>
+                                </Tooltip>
+                              )}
+                            </TableCell>
                           </TableRow>
                           {hasError && (
                             <TableRow key={`${job.id}-err`}>
-                              <TableCell colSpan={8} sx={{ py: 0 }}>
+                              <TableCell colSpan={9} sx={{ py: 0 }}>
                                 <Collapse in={isExpanded}>
                                   <Box sx={{ p: 1.5, bgcolor: 'grey.50', borderRadius: 1, my: 0.5 }}>
                                     <Typography